fm approval standard for flexible sprinkler pipes

Approval Standard for

Flexible Sprinkler Hose With Threaded End Fittings

Class Number 1637

February 2010 Copyright © 2010 by FM Approvals LLC. All rights reserved.

Foreword

The FM Approvals certification mark is intended to verify that the products and services described will meet FM Approvals’ stated conditions of performance, safety and quality useful to the ends of property conservation. The purpose of Approval Standards is to present the criteria for FM Approval of various types of products and services, as guidance for FM Approvals personnel, manufacturers, users and authorities having jurisdiction.

Products submitted for certification by FM Approvals shall demonstrate that they meet the intent of the Approval Standard, and that quality control in manufacturing shall ensure a consistently uniform and reliable product. Approval Standards strive to be performance-oriented. They are intended to facilitate technological development.

For examining equipment, materials and services, Approval Standards:

a) must be useful to the ends of property conservation by preventing, limiting or not causing damage under

the conditions stated by the Approval listing; and

b) must be readily identifiable.

Continuance of Approval and listing depends on compliance with the Approval Agreement, satisfactory performance in the field, on successful re-examinations of equipment, materials, and services as appropriate, and on periodic follow-up audits of the manufacturing facility.

FM Approvals LLC reserves the right in its sole judgment to change or revise its standards, criteria, methods, or procedures.

Table of Contents

1. INTRODUCTION ................................................................................................................................................................1 1.1 PURPOSE.........................................................................................................................................................................1 1.2 SCOPE.............................................................................................................................................................................1 1.3 BASIS FOR REQUIREMENTS.............................................................................................................................................1 1.4 BASIS FOR APPROVAL.....................................................................................................................................................2 1.5 BASIS FOR CONTINUED APPROVAL.................................................................................................................................2 1.6 EFFECTIVE DATE ............................................................................................................................................................2 1.7 SYSTEM OF UNITS...........................................................................................................................................................2 1.8 APPLICABLE DOCUMENTS ..............................................................................................................................................3 1.9 DEFINITIONS...................................................................................................................................................................3

2. GENERAL INFORMATION ...............................................................................................................................................5 2.1 PRODUCT INFORMATION.................................................................................................................................................5 2.2 APPROVAL APPLICATION REQUIREMENTS......................................................................................................................5 2.3 REQUIREMENTS FOR SAMPLES FOR EXAMINATION.........................................................................................................5

3. GENERAL REQUIREMENTS ............................................................................................................................................6 3.1 REVIEW OF DOCUMENTATION ........................................................................................................................................6 3.2 PHYSICAL OR STRUCTURAL FEATURES...........................................................................................................................6 3.3 MATERIALS ....................................................................................................................................................................7 3.4 MARKINGS......................................................................................................................................................................7 3.5 MANUFACTURER'S INSTALLATION AND OPERATION INSTRUCTIONS...............................................................................7 3.6 CALIBRATION .................................................................................................................................................................8 3.7 TOLERANCES ..................................................................................................................................................................8

4. PERFORMANCE REQUIREMENTS..................................................................................................................................8 4.1 EXAMINATION ................................................................................................................................................................8 4.2 FATIGUE .........................................................................................................................................................................8 4.3 VIBRATION .....................................................................................................................................................................9 4.4 PRESSURE CYCLING TEST.............................................................................................................................................10 4.5 VACUUM TEST..............................................................................................................................................................11 4.6 FRICTION LOSS (EQUIVALENT LENGTH OF PIPE) ..........................................................................................................11 4.7 HYDROSTATIC STRENGTH ............................................................................................................................................12 4.8 SEAL INTEGRITY...........................................................................................................................................................13 4.9 HIGH PRESSURE FLOW..................................................................................................................................................13 4.10 ELONGATION ................................................................................................................................................................14 4.11 ADDITIONAL TESTS ......................................................................................................................................................14

5. OPERATIONS REQUIREMENTS ....................................................................................................................................14 5.1 DEMONSTRATED QUALITY CONTROL PROGRAM ..........................................................................................................14 5.2 FACILITIES AND PROCEDURES AUDIT (F&PA) .............................................................................................................16 5.3 MANUFACTURER'S RESPONSIBILITIES...........................................................................................................................16 5.4 MANUFACTURING AND PRODUCTION TESTS.................................................................................................................17

5.4.1 TEST REQUIREMENT - PRESSURE TEST......................................................................................................................17 5.4.2 TEST REQUIREMENT - VISUAL INSPECTION...............................................................................................................17

5.5 WELDER TRAINING REQUIREMENTS.............................................................................................................................17 APPENDIX A: UNITS OF MEASUREMENT .................................................................................................................................18 APPENDIX B: FM APPROVALS CERTIFICATION MARKS ..........................................................................................................19 APPENDIX C: FIGURES ............................................................................................................................................................21

FIGURE C-1. TEST APPARATUS FOR FATIGUE TEST.............................................................................................................21 FIGURE C-2. TEST APPARATUS FOR MEASURING SPRINKLER NOMINAL K-FACTORS .........................................................22 FIGURE C-3. TEST APPARATUS WITH FLEXIBLE SPRINKLER HOSE WITH THREADED END FITTINGS FOR MEASURING

FRICTION LOSS (EQUIVALENT LENGTH OF PIPE) WITH ONE OR TWO BENDS ON THE HOSE......................................23

FIGURE C-4. TEST APPARATUS WITH FLEXIBLE SPRINKLER HOSE WITH THREADED END FITTINGS FOR MEASURING FRICTION LOSS (EQUIVALENT LENGTH OF PIPE) WITH THREE OR FOUR BENDS ON THE HOSE.................................24

FIGURE C-5. TEST ARRANGEMENT FOR VIBRATION TEST...................................................................................................25 FIGURE C-6. TEST ARRANGEMENT FOR PRESSURE CYCLING TEST .....................................................................................26

APPENDIX D: SAMPLE LISTING ...............................................................................................................................................27 APPENDIX E: TOLERANCES......................................................................................................................................................28

1637 February 2010

FM APPROVALS 1

1. INTRODUCTION 1.1 Purpose

1.1.1 This standard states Approval criteria for flexible sprinkler hose with threaded end fittings for use in clean rooms, commercial suspended ceilings, and ducts. Other applications shall be evaluated on a case-by-case basis.

1.1.2 Approval criteria may include, but are not limited to, performance requirements, marking requirements,

examination of manufacturing facility(ies), audit of quality assurance procedures, and a follow-up program. 1.2 Scope

1.2.1 This standard encompasses the design and performance requirements for flexible sprinkler hose with threaded end fittings for their intended application of connecting the sprinklers in a clean room, commercial suspended ceiling, or duct to the sprinkler piping.

1.2.2 A commercial suspended ceiling is a type of ceiling used predominately in Light Hazard Occupancies. It is also

used less frequently in Ordinary Hazard Occupancies. A typical commercial suspended ceiling system is a “T-Bar Grid”. In a T-Bar Grid ceiling, a metal component with an inverted “T” cross-section is used to secure and support acoustical lay-in panels.

1.2.3 Rigid furring channel is another type of commercial ceiling system.

1.2.4 Other applications shall be evaluated on a case-by-case basis. In cases where metric sized flexible sprinkler

hose with threaded end fittings are to be examined for Approval, test criteria comparable to the equivalent or nearest nominal inch size shall be used.

1.2.5 Approval Standards are intended to verify that the product described will meet stated conditions of

performance, safety and quality useful to the ends of property conservation. 1.3 Basis for Requirements

1.3.1 The requirements of this standard are based on experience, research and testing, and/or the standards of other organizations. The advice of manufacturers, users, trade associations, jurisdictions and/or loss control specialists was also considered.

1.3.2 The requirements of this standard reflect tests and practices used to examine characteristics of flexible sprinkler

hose with threaded end fittings for the purpose of obtaining Approval. Flexible sprinkler hose with threaded end fittings having characteristics not anticipated by this standard may be FM Approved if performance equal, or superior, to that required by this standard is demonstrated, or if the intent of the standard is met. Alternatively, flexible sprinkler hose with threaded end fittings which meet all of the requirements identified in this standard may not be FM Approved if other conditions which adversely affect performance exist or if the intent of this standard is not met.

1637 February 2010

FM APPROVALS 2

1.4 Basis for Approval

Approval is based upon satisfactory evaluation of the product and the manufacturer in the following major areas:

1.4.1 Examination and tests on production samples shall be performed to evaluate:

• The suitability of the product; • The performance of the product as specified by the manufacturer and required by FM Approvals; and, as

far as practical, • The durability and reliability of the product.

1.4.2 An examination of the manufacturing facility(ies) and an audit of quality control procedures shall be made to

evaluate the manufacturer's ability to produce the product which was examined and tested, and the marking procedures used to identify the product. These examinations and audits are repeated as part of FM Approvals' product follow-up program.

1.5 Basis for Continued Approval

Continued Approval is based upon:

• Production or availability of the product as currently FM Approved; • The continued use of acceptable quality assurance procedures; • Satisfactory field experience; • Compliance with the terms stipulated in the Master Agreement; • Satisfactory re-examination of production samples for continued conformity to requirements; and • Satisfactory Facilities and Procedures Audits (F&PA’s) conducted as part of FM Approvals’ product

follow-up program.

Also, as a condition of retaining Approval, manufacturers shall not change a product or service without prior authorization by FM Approvals.

1.6 Effective Date

The effective date of an Approval Standard mandates that all products tested for Approval after the effective date shall satisfy the requirements of that standard. Products FM Approved under a previous edition shall comply with the new version by the effective date or forfeit Approval.

The effective date of this standard is (January 31, 2011) for compliance with all requirements.

1.7 System of Units

Units of measurement used in this standard are United States (U.S.) customary units. These are followed by their arithmetic equivalents in International System (SI) units, enclosed in parentheses. The first value stated shall be regarded as the requirement. The converted equivalent value may be approximate. Appendix A lists the selected units and conversions to SI units for measures appearing in this standard. Conversion of U.S. customary units is in accordance with the Institute of Electrical and Electronics Engineers (IEEE)/American Society for Testing and Materials (ASTM) SI 10-2002, American National Standard for Use of the International System of Units (SI): The Modern Metric System. Two units (liter and bar), outside of, but accepted by, SI are commonly used in international fire protection and are used in this standard.

1637 February 2010

FM APPROVALS 3

2/1pQK =

1.8 Applicable Documents

The following standards, test methods, and practices are referenced in this standard or are beneficial in understanding this standard:

ANSI/ASME B1.20.1-1983 (R2006), Pipe Threads, General Purpose (Inch) FM Global Property Loss Prevention Data Sheets IEEE/ASTM SI 10-2002, American National Standard for Use of the International System of Units (SI): The

Modern Metric System International Organization for Standardization (ISO) 7369 - 2004, Pipework - Metal Hoses and Hose Assemblies -

Vocabulary ISO 10380 - 2003, Pipework -- Corrugated Metal Hoses and Hose Assemblies ISO 17025 (2005), General Requirements for the Competence of Testing and Calibration Laboratories

1.9 Definitions

For purposes of this standard, the following terms apply:

Accepted This term refers to installations acceptable to the authority enforcing the applicable installation rules (Authority Having Jurisdiction). When the authority is FM Global, such locations are termed “FM Global Accepted.” Acceptance is based upon an overall evaluation of the installation. Factors other than the use of FM Approved equipment impact upon the decision to accept the product. Acceptance is not a characteristic of a product, it is installation specific. A product accepted for one installation may thus not be acceptable elsewhere. (Contrast with FM Approved.)

Attachment

Method of joining end fittings to a flexible metal hose.

Braid Tubular woven stocking of metal wires used to provide pressure strength and/or external protection.

Clean Rooms

A clean room is an enclosed space in which airborne particulates, contaminants, and pollutants are kept within strict limits.

Corrosion Resistant

Flexible sprinkler hose with threaded end fittings shall be termed corrosion resistant if its interior surface exhibits equivalent resistance to aqueous corrosion as steel pipe which is internally coated with zinc.

Corrugated Metal Hose

Pressure-tight hose with corrugations, helicoidally (formed or arranged in a spiral) or annular (formed in a ring) to the axis of the hose. Made by deforming the metal, the corrugations provide flexibility.

Discharge Coefficient (K-Factor)

The coefficient of discharge as expressed in the equation:

Where Q is the flow in gallons per minute (gal/min), and P is the pressure in pounds per square inch (psi). Expressed in SI units: Q is the flow in liters per minute (l/min) and P is the pressure in bar.

1637 February 2010

FM APPROVALS 4

End Connection The fitting/component used to connect components of a pipe system or an individual sprinkler to the flexible sprinkler hose with threaded end fittings.

End Fitting

Permanently attached fitting which allows metal hose to be connected to other components.

Flexibility The capability of a metal hose to be repeatedly bent elastically during operation.

FM Approvals Certification Mark

The FM Approvals Certification Marks are detailed in Appendix B. Their use is mandatory on all units of FM Approved flexible sprinkler hose with threaded end fittings. These registered marks cannot be used except as authorized by FM Approvals via the granting of Approval to a specific product.

FM Approved

This term refers to products FM Approved by FM Approvals. Such products are listed in the Approval Guide, an online resource of FM Approvals. All products so listed have been successfully examined by FM Approvals and their manufacturers have signed and returned a Master Agreement to FM Approvals. This agreement obligates the manufacturer to allow re-examination of the product and audit of facilities and procedures at the discretion of FM Approvals. It further requires the manufacturer not to deviate from the as - FM Approved configuration of the product without review by and agreement of FM Approvals. Approval is product specific.

Light Hazard Occupancy

An occupancy in which the quantity and/or combustibility of contents is low and fires with relatively low rates of heat release are expected. Light Hazard Occupancies include occupancies having conditions similar to: apartments, churches, clubs, eaves and overhangs (if combustible construction with no combustibles beneath), educational facilities, hospitals, institutional facilities, libraries (except large stack rooms), museums, nursing or convalescent homes, office (including data processing), residential facilities, restaurant seating areas, theaters and auditoriums (excluding stages and prosceniums), and unused attics. Refer to the FM Global Property Loss Prevention Data Sheets for more specific information.

Minimum Bend Radius

The minimum radius [expressed in inches (mm)], specified by the manufacturer, at which a hose is designed to operate.

Metal Hose Assembly

Assembly of a metal hose with its end fittings.

Ordinary Hazard Occupancy An occupancy where the quantity and combustibility of contents is greater than that of a Light Hazard Occupancy. Refer to the FM Global Property Loss Prevention Data Sheets for more specific information.

Pendent Sprinkler

An automatic sprinkler designed such that the water exiting its orifice is directed downward against the deflector.

Rated Working Pressure The maximum sustained pressure at which the flexible sprinkler hose with threaded end fittings may operate.

Sidewall Sprinkler

An automatic sprinkler intended for installation near a wall and ceiling interface and designed to discharge water horizontally outward and onto adjacent walls.

Suspended Ceiling

A ceiling in which the main runners and cross furring are suspended below the structural members of the building.

1637 February 2010

FM APPROVALS 5

2. GENERAL INFORMATION 2.1 Product Information

In order to meet the intent of this standard, flexible sprinkler hose with threaded end fittings shall be examined on a model-by-model, type-by-type, manufacturer-by-manufacturer, and plant-by-plant basis. This is predicated on the basis that identical designs, fabricated using identical materials by different manufacturers or, even by different plants of the same manufacturer, have sometimes been shown to perform differently in testing. Sample hoses, selected in conformance to this criterion, shall satisfy all of the requirements of this standard.

2.2 Approval Application Requirements

To apply for an Approval examination, the manufacturer, or their authorized representative, shall submit a request to: Hydraulics Group Manager

FM Approvals Hydraulics Laboratory 743 Reynolds Road

West Glocester, RI 02814 U.S.A.

The manufacturer shall provide the following preliminary information with any request for Approval consideration:

A complete list of all models, types, sizes, and options for the products or services being submitted for Approval consideration

The minimum bend radius of the flexible sprinkler hose The type of application for the flexible sprinkler hose: clean room, commercial suspended ceiling or duct General assembly drawings, one complete set of manufacturing drawings, materials list(s), anticipated marking

format, brochures, sales literature, specification sheets, installation, operation and maintenance procedures All drawings are required to identify the manufacturer's name, document number, title, date of last revision, and

revision level The number and location(s) of manufacturing facilities

All foreign language documents shall be provided with English translation.

2.3 Requirements for Samples for Examination

Following generation and authorization of an Approval examination, the manufacturer shall submit samples for examination and testing. Sample requirements are determined by FM Approvals following review of the preliminary information. Sample requirements may vary depending on design features, results of prior testing, and results of the foregoing tests. It is the manufacturer’s responsibility to submit samples representative of production. Any decision to use data generated utilizing prototypes is at the discretion of FM Approvals. The manufacturer shall provide any special test fixtures which may be required to evaluate the flexible sprinkler hose with threaded end fittings.

1637 February 2010

FM APPROVALS 6

3. GENERAL REQUIREMENTS 3.1 Review of Documentation

During the initial investigation and prior to physical testing, FM Approvals shall review the manufacturer's specifications, technical data sheets, and design details to assess the ease and practicality of installation and use of the flexible sprinkler hose with threaded end fittings. The product shall be capable of being used within the limits of the Approval investigation.

3.2 Physical or Structural Features

3.2.1 Flexible sprinkler hose are for use in wet pipe and dry pipe systems.

3.2.2 Flexible sprinkler hoses with threaded end fittings shall be designed for a minimum rated working pressure of 175 psi (1205 kPa). Other pressures may be considered at the discretion of FM Approvals.

3.2.3 Flexible sprinkler hose with threaded end fittings covered by this standard shall be a nominal 3/4, 1, 1-1/4 or 1-

1/2 in. diameter. The smallest inside diameter allowed for the flexible sprinkler hose is 0.75 inch (19.05 mm).

3.2.4 A flexible sprinkler hose assembly, including end connections, shall have a maximum length of 6 ft (1.8 m). Both ends of the flexible sprinkler hose assembly shall come equipped with end connections.

3.2.5 All flexible sprinkler hoses shall have end connections such that they cannot be interconnected to create longer

lengths.

3.2.6 Flexible sprinkler hoses with threaded end fittings submitted for testing shall be true production samples and shall be free of sharp edges, burrs, or other imperfections which might injure the installer or interfere with proper assembly of the unit.

3.2.7 Threaded end fittings on flexible sprinkler hose shall be fabricated from metal.

3.2.8 Flexible sprinkler hoses with threaded end fittings shall have a stainless steel braided metallic outer jacket with

stainless steel internal bellows.

3.2.9 Non-metallic bellows are permitted but are restricted to Polytetrafluoroethylene (PTFE) convoluted hose, with a minimum thickness of 0.039 in. (1 mm).

3.2.10 Technical data sheets shall be provided by all manufacturers.

3.2.11 All connections shall be suitable for use with fittings having tapered pipe threads which conform to a national

or internationally recognized standard. Sprinklers which are to be sold in the United States shall be threaded to suit fittings manufactured in accordance with ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch), per Table 3.2.11.

Table 3.2.11. Threaded Connections Nominal K-Factor

gal/min/(psi)1/2 U.S. Nominal Pipe Thread

Size (NPT), in. 5.6 1/2 8.0 1/2 or 3/4

11.2 1/2 or 3/4 14.0 3/4 16.8 3/4 19.6 1 22.4 1 25.2 1

1637 February 2010

FM APPROVALS 7

3.2.12 The automatic sprinklers listed in Table 3.2.11 are acceptable for use in flexible sprinkler hose, providing a friction loss determination is conducted on each K-Factor and with a 1/2, 3/4 or 1 inch orifice size (See Section 4.6).

3.3 Materials

All materials used in these hoses shall be suitable for the intended application. Hose parts exposed to water shall be constructed of corrosion resistant materials. When non-standard or unusual materials are used, special tests may be necessary to verify their suitability.

3.4 Markings

3.4.1 Each flexible sprinkler hose with threaded end fittings shall be permanently marked on its external surface with the following information:

• Manufacturer’s name or trademark; • Nominal size; • Rated working pressure; • Model designation; and • The FM Approvals Certification Mark.

3.4.2 Markings shall be cast or forged in raised characters, etched or die stamped on the fitting assembly.

3.4.3 A corrosion resistant metal nameplate or a corrosion resistant aluminum sticker bearing the same information

as stated above shall be considered acceptable if permanently fastened to the flexible hose or fitting assembly.

3.4.4 Other methods of applying permanent markings may be evaluated on a case-by-case basis.

3.4.5 Each required marking listed in Section 3.4.1 shall be legible and durable and applied in any of, or combination of, the above methods.

3.4.6 The model or type identification shall correspond with the manufacturer's catalog designation and shall

uniquely identify the product as FM Approved. The manufacturer shall not place this model or type identification on any other product unless covered by a separate agreement with FM Approvals.

3.4.7 The FM Approvals Certification Marks (see Appendix B) shall be displayed visibly and permanently on the

product. The manufacturer shall not use these marks on any other product unless such product is covered by separate agreement with FM Approvals.

3.5 Manufacturer's Installation and Operation Instructions

Installation instructions, including any special dimension requirements and friction loss data, shall be furnished by the manufacturer. Instructions shall be provided in each shipping container.

1637 February 2010

FM APPROVALS 8

3.6 Calibration

Each piece of equipment used to verify the test parameters shall be calibrated within an interval determined on the basis of its stability, purpose, and usage. A copy of the calibration certificate for each piece of test equipment shall be submitted to FM Approvals for its records. The certificate shall indicate that the calibration was performed against working standards whose calibration is certified as traceable to the National Institute of Standards and Technology (NIST) or traceable to other acceptable reference standards and certified by an ISO 17025 calibration laboratory. The test equipment shall be clearly identified by label or sticker showing the last date of the calibration and the next due date. A copy of the service accreditation certificate as an ISO 17025, "General Requirements for the Competence of Testing and Calibration Laboratories", calibration laboratory is required for FM Approvals records.

The calibration of new equipment is also required. Documentation indicating either the date of purchase or date of shipment, equipment description, and model and serial number is required for identification. The period from the time the equipment was put into service to the date of testing must be within an interval that does not require the equipment to be calibrated as determined on the basis of the parameters mentioned above. The new test equipment shall be clearly identified by label or sticker showing the last date of the calibration and the next due date.

3.7 Tolerances

Tolerances on units of measure shall be as described in Appendix E, unless otherwise specified in this standard. 4. PERFORMANCE REQUIREMENTS 4.1 Examination

4.1.1 Requirement

The flexible sprinkler hose with threaded end fittings shall conform to the manufacturer’s drawings and specifications and to FM Approvals requirements.

4.1.2 Test/Verification

A sample shall be examined by FM Approvals and compared to drawings and specifications. It shall be verified that the sample conforms to the physical and structural requirements described in Section 3, General Requirements.

4.2 Fatigue

4.2.1 Requirement

Flexible sprinkler hose with threaded end fittings shall be subjected to 50,000 cycles of repeated flexing at a rate of 5 cycles/minute to 15 cycles/minute in a direction parallel with the axis of the end fittings while pressured to their rated working pressure. There shall be no deterioration of the flexible sprinkler hose or its performance characteristics. Following the fatigue test, the flexible sprinkler hose with threaded end fittings shall not leak or fail when tested in accordance with the hydrostatic test requirements in Section 4.7 (Hydrostatic Strength).

1637 February 2010

FM APPROVALS 9


Prior to the fatigue test, the test assembly shall be filled with water and subjected to a hydrostatic strength test to four times the rated working pressure, 700 psi (4825 kPa) minimum. The test shall be conducted for a duration of five minutes. No leakage or rupture is allowed.

The fatigue test shall be conducted in a similar fashion to the “U-Bend” test referenced in ISO 10380, Pipework -- Corrugated Metal Hoses and Hose Assemblies. A minimum of two samples of flexible sprinkler hose with fittings, of the longest size submitted for Approval, shall be subjected to 50,000 cycles of repeated flexing at a rate of 5 cycles/minute to 15 cycles/minute in a direction parallel with the axis of the end fittings while pressurized to their rated working pressure, as shown in Figure C-1. The sample hose shall be mounted in a U shape with the end fittings at a horizontal distance from each other of twice the minimum bend radius, r, of the hose, as defined by the manufacturer’s literature. One end of the sample shall be held in a fixed position and the other end shall be flexed in the vertical plane a distance of 4 times the nominal diameter of the sprinkler fittings above and below the position of the fixed end for a total vertical movement of 8 times the nominal diameter.

After completion of 50,000 cycles, the samples shall be subjected to the hydrostatic post-test as detailed in Section 4.7 (Hydrostatic Strength).

4.3 Vibration

4.3.1 Requirements

Flexible sprinkler hose with threaded end fittings and its attachment hardware shall be able to withstand the effects of vibration without deterioration of their performance characteristics. Following the vibration test detailed in Section 4.3.2, there shall be no deterioration of the sprinkler hose, its fittings or its attachment hardware. Following exposure to the vibration test the flexible sprinkler hose with threaded end fittings shall not leak when tested in accordance with Section 4.7 (Hydrostatic Strength).

4.3.2 Tests/Verification

4.3.2.1 A flexible sprinkler hose assembly, depending on intended installation application, shall be secured

to a vibration table with the outlet end fitting in a vertical plane and the hose bent in a 90° angle, at its minimum bend radius, as defined by the manufacturer’s literature. The inlet of the flexible sprinkler hose with threaded end fittings shall be securely fixed in a horizontal plane, as shown in Figure C-5. The flexible hose shall be filled with water and pressurized to 90 psi (620 kPa) while being subjected to the vibration conditions in Table 4.3.2.

Table 4.3.2 Vibration Conditions

Total Table Stroke Frequency Time in. (mm) Hz Hours

0.020 (0.51) 28 5 0.040 (1.04) 28 5 0.150 (3.81) 28 5 0.040 (1.04) 18 to 37 variable 5 0.070 (1.78) 18 to 37 variable 5

4.3.2.2 If the flexible sprinkler hose under examination is for use in ducts, a 12 inch (305 mm) long, 12 inch

(305 mm) diameter duct is secured to the vibration table. The outlet end of the flexible hose is secured to the duct, and is placed in a vertical plane. The inlet end of the hose is bent in a 90° angle at its minimum bend radius, as defined by the manufacturer’s literature, while the inlet is securely fixed in the horizontal plane and vibration tested.

1637 February 2010

FM APPROVALS 10

4.3.2.3 If the flexible sprinkler hose under examination is for use in a cleanroom ceiling grid, a 15 inch (380 mm) long cleanroom ceiling grid under examination is secured to the vibration table. The outlet end of the flexible hose is secured in the ceiling grid. With the outlet end fitting in a vertical plane, the hose is bent in a 90° angle at its minimum bend radius, as defined by the manufacturer’s literature, and vibration tested.

4.3.2.4 If the flexible sprinkler hose under examination is for use in a commercial suspended ceiling

application, a 24 x 24 inch (610 x 610 mm) commercial ceiling frame assembly is secured to the vibration table. The required bracket, screws and clamps for assembly in a commercial suspended ceilings system are required to be submitted for the vibration test. The outlet end of the flexible hose is secured in the ceiling assembly, and with the outlet end fitting in a vertical plane, the hose is bent in a 90° angle at its minimum bend radius, as defined by the manufacturer’s literature, and vibration tested.

4.3.2.5 During the vibration tests, acoustical lay-in ceiling panels are not required to be used in the metal

framing assembly, as the testing determines the integrity of the flexible sprinkler hose connected with the associated hardware (brackets, clamps, screws, washers, lock washers etc), which the manufacturer supplies for their specific application. Acoustical lay-in ceiling panels may be used during the testing if deemed necessary by FM Approvals.

4.3.2.6 Vibration Test Requirements:

• Commercial Suspended Ceiling: A vibration test is conducted on hose assemblies for use in a

commercial suspended ceiling. The required bracket, screws, clamps for assembly in a commercial suspended ceilings system need to be submitted. A 2 x 2 ft (610 x 610 mm) ceiling frame is required to be submitted for test.

• Cleanroom Ceiling: A vibration test is conducted on hose assemblies for use in a cleanrooms. A 12 inch long cleanroom ceiling grid is required to be submitted for each cleanroom ceiling grid submitted, and all screws to attach the grid to the hose assembly need to be submitted for test.

• Duct: A vibration test is conducted on hose assemblies for use in ducts. A 12 inch diameter, 12 inch long duct, mounting block and all associated screws, and hardware is required to be submitted for test.

4.3.2.7 After completion of the vibration test, the hose sample shall not leak or fail when tested in

accordance to the hydrostatic post-test as detailed in Section 4.7 (Hydrostatic Strength). 4.4 Pressure Cycling Test

4.4.1 Requirement

Flexible sprinkler hose with threaded end fittings shall withstand 20,000 cycles of varying pressure while bent 90º with the threaded end fittings restrained and the hose unrestrained on a flat surface. There shall be no deterioration of the flexible sprinkler hose performance characteristics. Following the 20,000 cycles detailed in Section 4.4.2, the flexible sprinkler hose with threaded end fittings shall not leak or fail when tested in accordance with Section 4.7 (Hydrostatic Strength).


4.4.2.1 Prior to cycling, the test assembly shall be filled with water and subjected to a hydrostatic strength

test equal to four times the rated working pressure, 700 psi (4825 kPa) minimum. The test shall be conducted for a duration of five minutes. No leakage or rupture is allowed.

1637 February 2010

FM APPROVALS 11

4.4.2.2 The test sample shall be bent at a 90º angle, with the threaded end fittings restrained and the hose unrestrained on a flat surface, at its minimum bend radius, as specified in the manufacturer’s literature. The hose assembly shall then be subjected to 20,000 cycles of hydrostatic pressure varying from 0 to 175 psi (0 to 1205 kPa) or its rated working pressure, whichever is greater, at a rate of approximately 6 cycles per minute.

4.4.2.3 After completion of 20,000 cycles, the samples shall not leak or fail when subjected to the

hydrostatic post-test as detailed in Section 4.7 (Hydrostatic Strength). 4.5 Vacuum Test

4.5.1 Requirement

Flexible sprinkler hose with threaded end fittings shall withstand a vacuum of 26 in. Hg (0.88 bar) without collapse, leakage or deterioration of the flexible sprinkler hose performance characteristics. Following the vacuum test detailed in Section 4.5.2, there shall be no deterioration of its performance characteristics and the flexible sprinkler hose with threaded end fittings shall not leak or fail when tested in accordance with Section 4.7 (Hydrostatic Strength).


4.5.2.1 One previously untested hose sample shall be subjected to a vacuum of 26 in. Hg (0.88 bar) for a

period of 5 minutes, during which time there shall be no collapse or leakage.

4.5.2.2 After completion of the vacuum test, the sample shall not leak or fail when subjected to the hydrostatic post-test as detailed in Section 4.7 (Hydrostatic Strength).

4.6 Friction Loss (Equivalent Length of Pipe)

4.6.1 Requirements

To determine the effect of the flexible sprinkler hose with threaded end fittings on the hydraulic system, the average friction loss through the flexible sprinkler hose with threaded end fittings shall be equated to the theoretical length of nominal 1 in. diameter schedule 40 sprinkler pipe, with a C-factor of 120, which would produce the same amount of friction loss. The results shall be listed in the Approval Guide, an online resource of FM Approvals.


To determine the friction loss of flexible sprinkler hose, flow measurements shall be taken at 5 gal/min. (18.9 L/min.) increments from 25 gal/min. to 65 gal/min. (94.6 L/min. to 246 L/min.) on each hose length with a sprinkler head threaded into the outlet of the test assembly. The sprinklers used for this test shall have nominal discharge coefficients (K-factors) as listed in Table 4.6.1. Each flexible hose length shall be tested with a requested nominal K-Factor sprinkler listed in Table 4.6.1. The sprinkler shall be attached to the hose, and the hose shall be tested with its maximum number of bends, as shown in Table 4.6.2, but not to exceed the minimum radius (see Figure C-3) as specified by the manufacturer’s literature. A series of flow versus pressure drop (∆P) measurements shall be conducted to obtain the net friction loss across the hose. The average Cv coefficient shall then be calculated using the formula Cv = Q/P1/2 where Q is the flow rate in gpm and ∆P is the net friction loss in psi across the hose.

1637 February 2010

FM APPROVALS 12

Table 4.6.1 Nominal Discharge Coefficients (K-factors) Nominal K-Factor

gal/min/(psi)1/2 Nominal K-Factor dm3/min/(kPa)1/2

U.S. Nominal Thread Size, in.

5.6 8.0 1/2 8.0 11.5 1/2 or 3/4

11.2 16.0 1/2 or 3/4 14.0 20.0 3/4 16.8 24 3/4 19 27 1 22 31.7 1

25.2 36.0 1

The testing of flexible sprinkler hose for Friction Loss determination shall be conducted to produce reproducible and comparable test data. It is important that friction loss testing be standardized and that comparative data between hoses with the same lengths from various manufacturers be available. Table 4.6.2 may be used as a guideline.

Table 4.6.2 Number of Bends

Flexible Sprinkler Hose Lengths (m) Number of Bends

Up to 2 ft (0.61 m)

1

From 2 ft to 3 ft (0.61 m to 0.91 m)

2

From 3 ft to 4 ft (0.91 m to 1.21 m)

3

From 4 ft to 6 ft (1.21 m to 1.81 m)

4

4.7 Hydrostatic Strength

4.7.1 Requirement

Flexible sprinkler hose with threaded end fittings shall withstand a hydrostatic pressure of four times the rated working pressure without rupture, cracking, permanent distortion or deterioration of its performance characteristics.


Flexible sprinkler hose with threaded end fittings of each length shall be subjected to a hydrostatic pressure of 700 psi (4825 kPa) or four times the rated working pressure, whichever is greater, for five minutes. There shall be no visible rupture, cracking, permanent distortion or any deterioration of hose performance as a result of this test.

1637 February 2010

FM APPROVALS 13

4.8 Seal Integrity

4.8.1 Requirement

Flexible sprinkler hose with threaded end fittings that incorporate a sealing mechanism, such as o-rings or gaskets, shall withstand an exposure to temperatures of -40ºF (-40ºC) [low temperature] and 275ºF (135ºC) [high temperature] without cracking, leaking, permanent deformation or deterioration of the performance characteristics of the seal.


4.8.2.1 High Temperature Exposure

One sample of the flexible sprinkler hose with threaded end fittings and sealing mechanism, for each sealing mechanism material under examination, shall be hydrostatically tested to confirm that there is no leakage at the rated working pressure. Then the hose shall be drained and subjected to a high temperature oven-air exposure of 275ºF (135ºC) for 45 days. After exposure, the hose shall be allowed to cool to ambient air temperature. It shall then be pneumatically pressurized to 50 psi (345 kPa) and submerged in water. No leakage shall occur. The sealing mechanism, after removal from the hose, shall not crack when squeezed together from any two diametrically opposite points.

4.8.2.2 Low Temperature Exposure

One sample of the flexible sprinkler hose with threaded end fittings and sealing mechanism, for each sealing mechanism material under examination, shall be hydrostatically tested to confirm that there is no leakage at the rated working pressure. Then the hose shall be drained and subjected to a low temperature exposure of -40ºF (-40ºC) for 4 days. Immediately after exposure, the hose shall be submerged in an antifreeze solution at a temperature of -40ºF (-40ºC) and shall be pneumatically pressurized to 50 psi (345 kPa). No leakage shall occur. The depressurized hose shall then be allowed to warm to ambient temperature and disassembled. The sealing mechanism, after removal from the hose, shall not crack when squeezed together from any two diametrically opposite points.

4.9 High Pressure Flow

4.9.1 Requirement

Flexible sprinkler hose with threaded end fittings attached to commercial suspended ceiling frame assemblies shall be able to withstand the effects of a high pressure flow from an operated automatic sprinkler. Following the high pressure flow test detailed in Section 4.9.2, there shall be no deterioration of the sprinkler hose, its fittings or its attachment hardware.


A flexible sprinkler hose with threaded end fittings shall be fitted with a sprinkler and secured in a commercial ceiling assembly. The sprinkler shall be operated using a suitable heat source and allowed to discharge for a period of one minute. Five tests shall be conducted with pressures ranging from 40 psi to 175 psi (275 kPa to 1205 kPa) in approximately 35 psi (240 kPa) increments.

During and after the high pressure flow tests, the flexible sprinkler hose, fittings and attachment hardware shall be examined for leakage, rupture and movement.

1637 February 2010

FM APPROVALS 14

4.10 Elongation

4.10.1 Requirement

The length of flexible sprinkler hose with threaded end fittings shall not exceed 101 percent of its unstressed length after being subjected to a hydrostatic pressure equal to 1.5 times the rated working pressure.


The length of a flexible sprinkler hose with threaded end fittings of the maximum length submitted for Approval shall be placed in a straight assembly then measured and subjected to a hydrostatic pressure of 1.5 times the rated working pressure and held for 1 minute. After the 1 minute exposure, the test pressure shall be released and the sample length shall be measured again and the length shall not exceed 101 percent of the pre-test hose length.

4.11 Additional Tests

At the discretion of FM Approvals additional tests may be required, depending on design features, test results, or material application, to verify the integrity and reliability of the hoses. Unexplainable failures shall not be permitted. A re-test shall only be acceptable at the discretion of FM Approvals and with adequate technical justification of the conditions and reasons for failure.

5. OPERATIONS REQUIREMENTS A quality control program is required to assure that subsequent flexible sprinkler hose with threaded end fittings produced by the manufacturer at an authorized location shall demonstrate the same quality and reliability as the specific hoses examined. Design quality, conformance to design, and performance are the areas of primary concern. Design quality is determined during the Approval examination and tests, and is covered in the Approval Report. Conformance to design is verified by control of quality and is covered in the Facilities and Procedures Audit (F&PA). Quality of performance is determined by field performance and by periodic re-examination and testing. 5.1 Demonstrated Quality Control Program

5.1.1 The manufacturer shall demonstrate a quality assurance program which specifies controls for at least the following areas:

• Existence of corporate quality assurance guidelines; • Incoming quality assurance, including testing; • In-process quality assurance, including testing; • Welding Procedures and welder training; • Final inspection and tests; • Equipment calibration; • Drawing and change control; • Packaging and shipping; and, • Handling and disposition of discrepant materials.

In order to assure adequate traceability of materials and products, the manufacturer shall maintain records of all quality control tests performed for a minimum period of two years from the date of manufacture of the flexible sprinkler hose with threaded end fittings.

1637 February 2010

FM APPROVALS 15

5.1.2 Documentation/Manual

The manufacturer shall maintain an authoritative collection of quality procedures and policies. Such documentation shall provide an accurate description of the quality management system while serving as a permanent reference for implementation and maintenance of that system. The system should require that sufficient records are maintained to demonstrate achievement of the required quality and to verify operation of the quality system.

5.1.3 Drawing and Change Control

The manufacturer shall establish a system of product configuration control that shall allow no unauthorized changes to the product. Revisions to critical documents, identified in the Approval Report, must be reported to, and authorized by, FM Approvals prior to implementation in production. The manufacturer shall assign an appropriate person or group to be responsible for reporting proposed revisions to FM Approved to FM Approvals. In situations involving significant modifications to an Approved product, the notification shall be in the form of a formal request for an Approval examination. For modifications of a more common nature, the manufacturer shall provide notification to FM Approvals by means of FM Approvals Form 797, FM Approved Product/Specification Tested Revision Request Form. Records of all revisions to all FM Approved products shall be maintained.

5.1.3.1 The table below has been included as a guide to manufacturers of what is considered to be a

significant change to FM Approvals. As mentioned above, modifications that fit this category shall be documented by means of a letter stating the change, and requesting a quotation for an Approval examination.

Modification Description/Example Increase of Pressure Rating The product was originally Approved for 175 psi (1205 kPa),

and now is to be evaluated to 300 psi (2070 kPa). Different application The product was Approved for commercial suspended ceiling,

clean rooms and or ducts, and now is to be evaluated for use in different type of application.

Different clean room grid The product was Approved for use with a particular clean room ceiling grid, and now is to be evaluated for use in a different type of ceiling grid.

Different type of commercial suspended ceiling

The product was Approved for use in a “T-Grid” commercial suspended ceiling, and now is to be evaluated for use in a different type of ceiling system.

Addition of Product Sizes The product was originally Approved for 1 inch NPS, and now Approval of 3/4, 1-1/4 and or 1-1/2 inch NPS is desired.

Addition or Relocation of the Manufacturing Location

The product was originally Approved in location A, and now is desired to be made in locations A and B, or only in location B.Modifications that would depart from the national or international standards that are used in the manufacturing ofthe product as originally Approved. Modifications that would have an effect on the use of the hose with standardized fittings/couplings.

Changes to Critical Material

Modifications that would have an effect on the ability of the product to maintain the same performance as the originally Approved product. An example of this would be a reduction / addition of wire braids.

1637 February 2010

FM APPROVALS 16

5.1.3.2 The table below has been included as a guide to manufacturers of modifications that are commonly submitted on FM Approvals Form 797.

Modification Description/Example Change in Company Contact Information

Name, Title, Phone Number, Fax Number, Email Address, Company Office Address, Company Name

Updating of Drawings The Form 797 is used to notify FM Approvals in the event of: minor dimensional changes to non-critical features, minor changes in notes, location of title block, re-creation of the same drawing on CAD, etc.

Changes in Markings Please describe what changes are to be made and include a drawing of the proposed marking.

Changes in Materials Where new material is either superior, or comparable to material used in original Approval

Updating of Documentation Creation of New or Revisions to Sales literature, Installation Instructions, Grooving Dimensions, Quality Manual, etc.

5.1.3.3 For the instances where the modification is difficult to categorize, manufacturers are encouraged to

contact FM Approvals to discuss the nature of the change, and inquire about how to send the information to FM Approvals. The examples shown in Sections 5.1.3.1 and 5.1.3.2 are based on common examples of modifications as they relate to the manufacture of flexible sprinkler hose.

5.2 Facilities and Procedures Audit (F&PA)

5.2.1 An audit of the manufacturing facility is part of the Approval investigation to verify implementation of the quality control program. Its purpose is to confirm that the manufacturer's equipment, procedures, and quality program are maintained to insure a consistently uniform and reliable product. Initial inspections of facilities already producing similar FM Approved products may be waived at the discretion of FM Approvals.

5.2.2 Unannounced follow-up inspections shall be conducted at least annually by FM Approvals, or its designate, to

determine continued compliance. More frequent audits may be required by FM Approvals.

5.2.3 The manufacturer shall produce the product or service only at the location(s) audited by FM Approvals and as specified in the Approval Report. Manufacture of products bearing the FM Approvals Certification Mark is not permitted at any other locations without prior written authorization by FM Approvals.

5.3 Manufacturer's Responsibilities

The manufacturer shall notify and receive authorization from FM Approvals for changes in product construction, design, components, raw materials, physical characteristics, coatings, component formulation or quality assurance procedures prior to implementation of such changes.

1637 February 2010

FM APPROVALS 17

5.4 Manufacturing and Production Tests

5.4.1 Test Requirement - Pressure Test

The manufacturer shall hydrostatically test 100 percent of production flexible sprinkler hoses with threaded end fittings for leakage at the rated working pressure. The minimum hydrostatic test duration shall be 30 seconds. Alternately the manufacturer can pneumatically test 100 percent of production flexible sprinkler hoses with threaded end fittings for leakage at one third the rated working pressure. The minimum test duration shall be 10 seconds.

5.4.2 Test Requirement - Visual Inspection

The manufacturer shall visually inspect 100 percent of production flexible sprinkler hoses with threaded end fittings. This inspection shall verify that all hoses are free from visual defects (especially damaged hose braid or threads).

5.5 Welder Training Requirements

The manufacturer shall train and maintain certified welders. The training records shall be maintained and available for the auditor to review during the facility and procedure audit.

1637 February 2010

FM APPROVALS 18

APPENDIX A: Units of Measurement

Discharge Coefficient

(K-Factor):

gal/min/(psi)1/2 - "gallons per minute per square root of pounds per square inch"

(L/min/(bar)1/2 - "liters per minute per square root of bar")

L/min/(bar)1/2 = gal/min/(psi)1/2 x 14.414

(dm3/min/(kPa)1/2 - “cubic decimeters per minute per square root of kilopascal”)

dm3/min/(kPa)1/2 = gal/min/(psi)1/2 x 1.4414

Flow: gal/min - “gallons per minute”; (L/min - “liters per minute”)

L/min = gal/min × 3.785

Frequency: Hz - Hertz (Also the SI unit)

Length: in. - “inches”; (mm - “millimeters”)

mm = in. x 25.4

ft - “feet”; (m - “meters”)

m = ft x 0.3048

Pressure: psi - “pounds per square inch”; (kPa - “kilopascals”)

kPa = psi x 6.895

bar - “bar”; (kPa - “kilopascals”)

bar = kPa x 0.01

bar = psi x 0.06895

Temperature: °F-‘‘degrees Fahrenheit’’;(C-‘‘degrees Celsius’’) °C=(°F -32) × 0.556

Vacuum: inHg - “inches of mercury”; (mmHg - “millimeters of mercury”)

mmHg = inHg x 25.4

inHg - “inches of mercury”; (bar - “bar”)

bar = inHg x 0.03386

Velocity: ft/s - “feet per second”; (m/s - “meters/second”)

m/s = ft/s x 0.3048

1637 February 2010

FM APPROVALS 19

APPENDIX B: FM Approvals Certification Marks

FM Approvals certifications marks are to be used only in conjunction with products or services that have been FM Approved by FM Approvals and in adherence with usage guidelines.

FM APPROVED mark: Authorized by FM Approvals as a certification mark for any product that has been FM Approved. There is no minimum size requirement for the mark, but it must be large enough to be readily identifiable. The mark should be produced in black on a light background, or in reverse on a dark background.

FM APPROVED mark with "C" only: Authorized by FM Approvals as a certification mark for any product that has been evaluated by FM Approvals in accordance with Canadian codes and standards. There is no minimum size requirement for the mark, but it must be large enough to be readily identifiable. The mark should be produced in black on a light background, or in reverse on a dark background.

FM APPROVED mark with "C" and "US": Authorized by FM Approvals as a certification mark for any product that has been evaluated by FM Approvals in accordance with US and Canadian codes and standards. There is no minimum size requirement for the mark, but it must be large enough to be readily identifiable. The mark should be produced in black on a light background, or in reverse on a dark background.

Cast-On FM APPROVALS marks: Where reproduction of the FM APPROVED mark described above is impossible because of production restrictions, use these modified versions of the FM APPROVED mark. There is no minimum size requirement for the mark, but it must be large enough to be readily identifiable.

Downloadable art and other FM Approvals resources are available by visiting our Web site at www.fmapprovals.com

1637 February 2010

FM APPROVALS 20

FM Approvals Certification Marks Usage Guidelines

All FM Approvals certification marks are the sole property of FM Approvals LLC (“FM Approvals”) and are registered or the subject of applications for registration in the United States and many other countries. They are for use only according to these guidelines.

FM Approvals certification marks may be used only on FM Approved products and related product packaging, in advertising material, catalogs and news releases. Use of FM Approvals certification marks on such material is not a substitute for use of the complete FM Approvals certification mark on FM Approved products and/or product packaging.

No FM Approvals certification mark or aspect thereof may be incorporated as part of a business name, Internet domain name, or brand name/trademark for products/product lines. This includes both design aspects (the FM Approvals “diamond,” etc.) and word aspects (“FM,” “Approved,” etc.). The use of any FM Approvals certification mark as a trademark is strictly prohibited.

The Approval Standard number or class number may not be incorporated as part of a business name, Internet domain name, or brand name/trademark for products/product lines. For example, a company may not say “ABC Company’s 4100 Fire Door is FM Approved”; the proper terminology is, “ABC Company’s Fire Door is FM Approved per Approval Standard 4100.”

FM Approvals certification marks, except for the FM Approvals Quality System Registration mark, may not be used on business stationery/cards/signage because this could mischaracterize the relationship with FM Approvals. Additionally, these items should not reference any FM Approvals certification mark.

Products or services may not be marketed under any mark or name similar to “FM Global,” “FM Approvals” or any of the FM Approvals certification marks. Further, products or services may not be marketed to imply a relationship beyond the scope of any Approval made by FM Approvals.

When an FM Approvals certification mark is used in advertising material or on product packaging, all material must reflect the specific circumstances under which the product was FM Approved. The material must clearly differentiate between products that are FM Approved and those that are not, and may not, in any way, imply a more substantial relationship with FM Approvals.

A company may not reference the intent to submit a product for Approval or the expectation that a company will have a certain product FM Approved in the future. For example, a company may not state, “Approval by FM Approvals pending” or “Approval by FM Approvals applied for.”

FM Approvals certification marks should not be preceded or followed by a qualifier that indicates a degree of certification or acceptability. For example, “exceeds,” “first” or “only” may not be used to qualify any FM Approvals certification mark.

Only original artwork issued by FM Approvals should be used. The FM Approvals certification marks should not be altered in any way other than to resize the artwork proportionately. Unacceptable uses of the marks include, but are not limited to, adding/deleting wording or artwork, reducing the artwork to an illegible size, animation or distortion.

The text of the FM Approvals certification marks may not be translated into any language other than English.

FM Approvals certification marks must appear in a size and location that is readily identifiable, but less prominent than the name of the owner of the certification or the manufacturer/seller/distributor of the certified products.

1637 February 2010

FM APPROVALS 21

MinimumBend Radius

Plug

To Pump

000000

CounterPulse Meter

Air OperatedPiston

4x Hose Diameter

4x Hose Diameter

BracketBracket

Fixed

APPENDIX C: Figures

Figure C-1. Test Apparatus for Fatigue Test

1637 February 2010

FM APPROVALS 22

Figure C-2. Test Apparatus for Measuring Sprinkler Nominal K-Factors

1/2 in., 3/4 in.or 1 in. NPTTapped Hole

Inlet of Tapped HoleR0.50 in. ± 0.03 in.

Tangent to Hole

Internal Faceof End Cap

Detail BGrooved End Cap

Cross-section

Section A-A

A

A

PiezometerRing

WaterSource Inlet

6 in. NominalPipe

SprinklerButt

GroovedEnd Cap

(See Detail B)

GroovedCoupling(Typical)

12 in. ± 0.5 inMinimum 36 in.

Gauge

CL

CL

CL CL

Note: All dimensions are nominal size unless otherwise indicated.Radius on Inlet may be truncated on internal face.

1.125 in.+0.125

-0.000

1637 February 2010

FM APPROVALS 23

PiezometerRing

PiezometerRing

PiezometerRing

PiezometerRing

Flexible SprinklerHose with Fittings


MinimumBend

Radius

MinimumBend

Radius

MinimumBend

Radius

Note: All dimensions are nominal size

12 in. (0.3 m) Lengthof 1 in. NPS Pipe




Sprinkler

Sprinkler

Two Bends

One Bend

Figure C-3. Test Apparatus with Flexible Sprinkler Hose with Threaded End Fittings for Measuring Friction Loss (Equivalent Length of Pipe) With One or Two Bends on the Hose

1637 February 2010

FM APPROVALS 24

PiezometerRing

PiezometerRing

PiezometerRing

PiezometerRing



MinimumBend

Radius

MinimumBend

Radius

MinimumBend

RadiusMinimum

BendRadius

MinimumBend

Radius

Note: All dimensions are nominal size





Sprinkler

Sprinkler

Four Bends

Three Bends

Figure C-4. Test Apparatus with Flexible Sprinkler Hose with Threaded End Fittings for Measuring Friction Loss (Equivalent Length of Pipe) With Three or Four Bends on the Hose

1637 February 2010

FM APPROVALS 25


MinimumBend Radius

Vibration Table

MountingSupport(Typical)

MountingBracket

RigidSupport

Plug

Rated WorkingPressure

CleanroomCeiling Grid

Figure C-5. Test Arrangement for Vibration Test

1637 February 2010

FM APPROVALS 26

Figure C-6. Test Arrangement for Pressure Cycling Test


MinimumBend Radius

RigidSupport

Plug

Rated WorkingPressure

RigidSupport

1637 February 2010

FM APPROVALS 27

APPENDIX D: Sample Listing Flexible Sprinkler Hose with Threaded End Fittings (1637) * Fire Protection Division

* Automatic Sprinkler Systems * Flexible Sprinkler Hose with Fittings

* For Cleanroom Ceilings Flexible sprinkler hose with threaded end fittings are for use in cleanroom ceilings. The flexible hoses are to be installed according to the manufacturer's directives. Unless indicated, the hoses have a rated working pressure of 175 psi (1205 kPa).

* For Commercial Suspended Ceilings Flexible sprinkler hose with threaded end fittings are for use in commercial suspended ceilings. The flexible hoses are to be installed according to the manufacturer's directives. Unless indicated, the hoses have a rated working pressure of 175 psi (1205 kPa).

* For Ducts Flexible sprinkler hose with threaded end fittings are for use in ducts. The flexible hoses are to be installed according to the manufacturer's directives. All of the models listed below are 1 in. nominal dia. flexible metal sprinkler hose for providing a connection to automatic sprinklers in ducts. Approval is limited for use in ducts only. Unless indicated, the hoses have a rated working pressure of 175 psi (1205 kPa).

PJC Company, 123 Any Street, Your Town, State, USA 01234

Equivalent Length of 1 inch schedule 40 pipe, (C=120)

Model Outlet size, NPT (inch)

Hose assembly length, ft

Maximum Number of 90º bends

Minimum Bend radius,

inch ft (m) PJC13 1/2 3 2 6 15 (4.6) PJC16 1/2 6 4 7 11 (3.3)

PJC987 3/4 4 2 8 19 (5.8) PJC9 3/4 5 3 6 21 (6.4)

1637 February 2010

FM APPROVALS 28

APPENDIX E: Tolerances

Unless otherwise stated, the following tolerances shall apply:

Amps: ± 0.25 percent of value

Angle: ± 2°

Frequency (Hz): ± 5 percent of value

Length: ± 2 percent of value

Pressure: within + 5 (35 kPa)/- 0 psi (0 kPa) of value

Temperature: ± 4°F (2°C)

Time: + 5/-0 seconds + 0.1/-0 minutes + 0.1/-0 hours + 0.25/-0 days

Volume: ± 5 percent of value

Unless stated otherwise, all tests other than operating tests shall be conducted at a room (ambient) temperature of 68 °F ± 9 °F (20 °C ± 5 °C).

Printed in USA