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है”ह”ह

IS 15277 (2002): Metallic Tube Connections for Fluid Powerand General Use Test Methods for Threaded Hydraulic FluidPower Connections [PGD 17: Fluid Power Fittings, Hoses andHose Assemblies]

IS 15277:2002ISO 8434-5:1995

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Indian Standard

METALLIC TUBE CONNECTIONS FORFLUID POWER AND GENERAL USE

TEST METHODS FOR THREADED HYDRAULIC FLUID

POWER CONNECTIONS

ICS 23.100.40

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@ BIS 2002

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

December 2002 Price Group 3I

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Fluid Power Fittings, Hoses and Hose Assemblies Sectional Committee, BP 17

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NATIONAL FOREWORD

This Indian Standard which is identical with ISO 8434-5:1995 ‘Metallic tube connections for fluid powerand general use — Part 5: Test methods for threaded hydraulic fluid power connections’ issued by theInternational Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards onthe recommendation of the Fluid Power Fittings, Hoses and Hose Assemblies Sectional Committee andapproval of the Basic and Production Engineering Division Council.

In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under pressurewithin a circuit. In general applications, a fluid maybe conveyed under pressure. Components may beconnected through their ports by connections (fittings), tubes anct hoses. Tubes are rigid conductors,hoses are flexible conductors.

The text of the ISO Standard has been approved as suitable for ~u,blicationas Indian Standard withoutdeviations. Certain conventions are, however, not identical to those used in Indian Standards. Attentionis particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they shouldbe read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practiceis to use a point (.) as the decimal marker. ~

In this adopted standard, reference appears to certain International Standards for which Indian Standardsalso exist. The corresponding Indian Standards which are to be substituted in their place are listed belowalong with their degree of equivalence for the editions indicated:

International Standard

ISO 48:1994 Rubber, vulcanizedor thermoplastic—Determinationof hardness (hardness between10 IRHD and 100 IRHD)

ISO 3448:1992 Industrial liquidlubricants—l SO viscosityclassification

ISO 5598:1985 Fluid powersystems and components—Vocabulary

1s0 6508:1986 Metallicmaterials — Rockwell hardnesstest — Part 1:Test method (ScalesA-B-C-D-E-F-G-H-K-N-T)

Corresponding Indian Standard

IS 3400(Part 2):1995 Methods of test forvulcanized rubbers: Part 2 Hardness(second revision)

IS 9466:1980 Viscosity classification ofindustrial liquid lubricants

IS 10416:1992 Fluid power systems andcomponents — Vocabulary (first revision)

IS 1586:2000 Method for Rockwell hardnesstest for metallic material (Scales A-B-C-D-E-F-G-H-K, 15N, 30N, 45N, 15T, 30T and45 T) (third revision)

Degree ofEquivalence

Technicallyequivalent

do

Identical

Technicallyequivalent

The Technical Committee responsible for the preparation of this standard has reviewed the provisions ofthe following ISO Standards and has decided that they are acceptable for ukie in conjunction with thisstandard:

ISO 3601-3:1987 Fluid systems—Sealing devices—O-rings — Part 3: Quahty acceptance criteria

ISO 6803:1994 Rubber or plastics hoses and hose assemblies— Hydraulic-pressure impulsetest without flexing

For the purpose of deciding whether a particular requirement of this standard is complied with, the finalvalue, observed or calculated, expressing the result of a test or analysis shall be rounded off in accordancewith IS 2:1960 ‘Rules for rounding off numerical values (revised)’. The number of significant placesretained in the rounded off value should be the same as that of the specified value in this standard.

IS 15277:2002ISO 8434-5:1995

Indian Standard

METALLIC TUBE CONNECTIONS FORFLUID POWER AND GENERAL USE

TEST METHODS FOR THREADED HYDRAULIC FLUID

POWER CONNECTIONS

1 Scope

This part of ISO 8434 specifies uniform methods forthe testing and performance evaluation of threadedmetallic tube connections and stud ends of ports forhydraulicfluid power.

Tests outlined in this part of ISO 8434 are indepen-dent of each other and document the method tofollow for each test; see the appropriate componentInternational Standard for the test requirements andperformance criteria.

2 Normative references

The following standards contain provisions which,throuah reference in this text, constitute wovisions of

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this p>rt of ISO 8434. At the” time of publication, theeditions indicated were valid. All standards are subjectto revision, and parties to agreements based on thispart of ISO 8434 are encouraged to investigate thepossibility of applying the most recent editions of thestandards indicated below. Members of IEC and ISOmaintain registers of currently valid InternationalStandards.

ISO 48:1994, Rubber, vulcanized or thermoplastic —Deterrbination of hardness (hardness between10 IRHD and 100 IRHD).

ISO 3448:1975, Industrial liquid lubricants — ISOviscosity classification — First edition.

ISO 3601-3:1987, Fluid systems — Sealing devices —O-rings — Part 3: Quality acceptance criteria.

ISO 5598:1985, Fluid power systems and components— Vocabulary.

ISO 65(M 1966, Mets//ic materia/s — Hardness test —Rockwell test(sceles A-B-C-D-E-F-G-H-K).

ISO 6603:1994, Rubber or plastics hoses and hose

assemblies — Hydraulic-pressure impulse test with-

out f/exing.

3 Definitions

For the purposes of this part of ISO 8434, the defi-nitionsgiven in ISO 5598 apply.

4 General requirements

4.1 Test samples

All components tested shall be tested in the final form(as the customer receives the part), includinganneal-ing as required for brazing.

4.2 Test temperature

Test temperature (ambient and liquid) shall be 15 “C to35 “C, unless otherwise specified in the controllingInternational Standard.

4.3 Testreport

Test results and test conditions shall be reported onthe test data form given in annex A.

CAUTION: Some of the tests described in this part ofISO 8434 are considered hazardous. It is thereforeessential that, in conducting these tests, all appro-

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IS 15277:2002ISO 8434-5:1995

priate safety precautions are strictly adhered to. 5.3.3 Pressure rise rateAttention is drawn to the danger of burst, fine jets(which can penetrate the skin) and energy release of During the proof test, the rate of pressure rise shall

expanding gases. To reduce the hazard of energy re- not exceed 138 MPa/min (1 380 barl J/rein).

lease, bleed air out of test specimens prior to press-ure testing. Tests shall be set up and performed by 5.4 Re-useof componentsproperly trained personnel.

Parts that pass this test may be used for other testsor in’production.

5 Proof pressure test

5.1 Principle 6 tih~ presaura tad (Burst)Testing of three samples to confirm that the specifiedconnection(s) meet(s) or exceed(s) a ratio of 2:1

6.1 Prkiple

between the proof and working pressure for 60s Testing of three samples to confirm that the specifiedminimum at proof pressure without any visual signs ofleakage.

connection(s) is (are) capable of withstanding aminimum of four, times the working pressure withoutfailure.

5.2 Test equipment

5.2.1 Test block 6.2 Testequipment

Test blocks shall be unplated and hardened to45 HRC to 55 HRC in accordance with 1S0 6508. Thedistance between the centrelines of test ports shall bea minimum of 1,5 times the port diameter. Thedistance between the port centreline and the edge ofthe test block shall be a minimum of 1 times the Portdiameter.

5.2.2 Test seals (if applicable)

Unless otherwise specified, seals shall be nitrile (NBR)rubber with a hardness of (90 f 5) IHRD whenmeasured in accordance with ISO 48. Seals shall con-form to their respective dimensional requirements,and O-rings shall meet or exceed the quality require-ments for grade N (general purpose) of ISO 3601-3, ifapplicable.

5.3 Procedure

Use the same equipment as in 5.2.

6.3 Procedures

Use the same procedures as in 5.3, except that therate of pressure rise shall be constant and be chosento reach the final pressure within 30s to 60s.

6.4 Re-useof components

Parts that pass this test shall not be tested further,used or returned to stock.

7 Cyclicendurancetest

7.1 Principle

5.3.1 Thread lubricationTesting of six samples at their respective impulsepressure to confirm that they pass a cyclic endurance

For testing only, threads and contact surfaces shall betest for 1000000 cycles without leakage or com-

Iubricated with hvdraulic oil with a viscosity of VG 32ponent failure.

in accordance w’ith ISO 3448 prior to application oftorque. 7.2 Testequipment

5.3.2 Torque Use the same equipment as in 5.2.

Tube connections and stud ends shall be tested at therequired minimum torques of the respective connec- 7.3 Procedurestor standard, if specified. Otherwise test at the mini-mum torque values supplied by the manufacturer. 7.3.1 Thread lubricationAdjustable stud torques shall be applied after beingbacked out one full turn from finge:-tight position totest correctly the worst possible actual assembly

Use the lubricant specified in 5.3.1.

conditions.7.3.2 Torques

1) 1 bar=O,l MPa = 105 Pa; 1 MPa = 1 N/mmz Apply torque as specified in 5.3.2.

2

7.3.3 Cycle rate

The cycle rate shall be uniform at 0,5 Hz to 1,3 Hz andshall conform to the wave pattern shown in ISO 6803.

7.4 Re-use of components

Parts that pass this test shall not be tested further,used or returned to stock.

8 Vacuum test

8.1 Principle

Testing of two samples to confirm that they arecapable of withstanding a vacuum of 6,5 kPa(0,065 bar) absolute pressure for 5 min withoutleakage.

8.2 Test equipment

Use the same equipment as specified in 5.2.

8.3 Procedure

8.3.1 Thread lubrication

Use the lubricant specified in 5.3.1.

8.3.2 Torque

Apply torque as specified in 5.3.2.

8.4 Re-use of components

Parts that pass this test may be used for other testsor in production.

IS 15277:2002ISO 8434-5:1995

9.2 Test equipment

An unplated threaded steel mandrel hardened to40 HRC to 45 HRC in accordance with 1S0 6508 shallbe used.

9.3 Procedure

9.3.1 Thread lubrication

Use the lubricant specified in 5.3.1,

9.3.2 Wrenching requirements

Connections shall be restrained during the test andthe wrench shall be located at the threaded end of thenut hex.

9.4 Re-use of components

Parts that pass this test shall not be tested further,used or returned to stock.

10 Identificationstatement (Reference tothis part of ISO 8434)

Use the following statement in test reports, cata-Iogues and sales literature when electing to complywith this part of ISO 8434:

“Test methods for metallic tube connections conformto ISO 8434-5:1995, Metallic tube connections for ,.. ----- .,fluid power and general use — Part 5: Test methodsfor threaded hydraulic fluid power connections. ”

9 Ovetiorque test

9.1 Principle

Testing of six samples to confirm that they arecapable of withstanding the overtorque qualificationtest when tested to the overtorque values shown intheir respective standards.

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IS 15277:2002ISO 8434-5: 1995

Annex A(normative)

Test data form

Specificationsfor connectionbeingtested ISO standard ............................... Material type ............................

Manufacturer .................................................................... Test facili~ .......................................................................................

Stud endtype ................................................................... ...................................................................................................Size

Proofpressuretest results min.numberof samplestested= 3

Sample No. Hardness Torque Pressure at failure

1 HRB ................. Nm . .. .... ............. ...............

2 HRB Nm .... .... ............. .. ............

3 HRB Nm . .... ............. .. ............ ..

Failure test (Burst) results min. number of samples tested = 3

Sample No. Hardness Torque Pressure at failure

1 HRB ................. N.m .......................................

2 HRB ....... ......... N.m .......................................

Testpressure ............... MPa

Type of failure

MPa ...............................................

MPa .......................... .... .. .. .... ....

MPa . ........ ..... ............. . . .. .. .. ..

Test pressure,.....,..,..,.. MPa

Type of failure

MPa ...............................................

MPa ...............................................

3 HRB ................. N.m. ....................................... MPa ...............................................

Cyclic endurance test results min. number of samples tested= 6 Test pressure ............... MPa

Sample No. Hardness Torque

1 .......... HRB ................. N.m

2 ..................... HRB ................. N.m

3 ................... . HRB, ................. N:m

4 .. ....... HRB ................. N.m

5 . . . HRB ................. Nm

6 . . ...... HRB ......... . ... . Nm

Vacuumtestresults:min. number of samples tested = 2

Sample No. Hardness Torque

1 . .... .. HRB ....... . ....... N.m

2 HRB . . ....... ..... N.m

Pressure absolute

. . .......... .

. . ........... . ......

Overtorquetestresults:min. number of samples tested = 6

Sample No. Nut hardness Torque at failure

1 ..... HRB ..............................................................

2 . .. .... . HRB ..............................................................

3 ... . HRB ..............................................................

4 HRB ..............................................................

5 . . . .... .... ..... HRB ..............................................................

6 .... . . ............ HRB ..............................................................

kPa

kPa

Nm

N.m

N.m

N.m

N.m

N.m

Test pressure, ......... kPa abs.

Type of failure

........... ...... ... ,.,

Test torque .................. N.m

Type of failure

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IS 15277:2002

ISO 8434-5:1995

ConclusionsPass/fail with reason for failure ............................................................................ ,,,,,,,,,,,,,,.,,.,,,, ,,,,,,,,,,, .,,,,,,,,. .. ....

Name (printed/typed) and dgnature of person certifying report:

...................... . . . . ........................................................................................ Date: ................................................

... ----

IS 15277:20021s0 8434-5:1995

Annex B(informative)

Applicable tests for various fitting and stud end standards

Teatapar ISO8434-5

Fittingand stud end standards) FailureProofpressure

Cyclkpressure endurance Vacuum Overtorque(Burst)

Fittings

ISO 8434-1 J J

ISO 8434-2 J J

1S0 8434-3 J 4 J J J

ISO 84344 J J

Stud ends

ISO 1179-2 J J

1s0 1179-3 J J

1s0 1179-4 J J

ISO 61 49-22) J J

ISO 6149-32) ‘ 4 J

ISO 9974-2 J J

1s0 9974-3 J J

ISO 11926-2 J J

ISO 11926-3 J J

1) See annex C.

2) Preferredfor new designs in hydraulic fluid power applications.

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This Indian Standard has been developed from Dot: No. BP 17 (0052).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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