flexible hose

FLEXIBLE METAL HOSES


328

STAINLESS STEEL METAL HOSESThe HAM-LET Flexible Metal Hose is designed to carry gases and

liquids at elevated rates of pressure and temperature or high vacuum,

in a vibrating environment or where flexibility is required.

The hose is composed from an inner hydroformed, corrugated thin-

walled tube that is externally braided or unbraided for vacuum service.

The flexible tube can be welded to a variety of fittings and connectors,

allowing compatibility with industry interfaces.

TYPICAL INDUSTRIES Pulp & Paper Mills

Chemical Industries

Pharmaceutical Industries

Semiconductor Industries

Vacuum Applications

TYPICAL APPLICATIONS Temperature Extremes

Chemical Compatibility

Flexibility or Vibration

Permeability Concerns

Fire Safety

Achieving Full Vacuum

MATERIALSTube: 321 Stainless Steel

316L Stainless Steel

316 Stainless Steel

Braid: 304 Stainless Steel

HOW TO SELECTWhen selecting a Flexible Metal Hose,

consider the following 5 variables:

1. Temperature

2. Dynamic pressure-carrying capability

3. Flexibility

4. Chemical compatibility

5. Optional accessories

1. TEMPERATUREAs the temperature increases, hose working pressure decreases.

After you have determined the proper alloy (see “Chemical

Compatibility” below), go to Table #2 “Working pressure de-rating

factor” and match the alloy of the hose and braid with the highest

temperature to which they will be exposed (either internally or

externally) to obtain the proper de-rating factors. Then multiply the

hose’s maximum working pressure by the most limiting temperature

de-rating factor.

2. DYNAMIC PRESSUREPulsating, surge or shock pressures, like those encountered by

quick opening or closing valves, can inflict severe damage on a

hose. If your application entails pulsating pressures, the working

pressure should be de-rated by 1/2. If your application entails shock

pressures, de-rate the stated working pressure to 1/6 of its value.

Example : 1/4” hose - T316L stainless steel hose and T304 stainless

steel braid at 300°F with the shock pressures:

Catalog Maximum Working Pressure = 1800 psi

Temperature De-rating Factor at 300°F = 0.86

Pressure De-rating Factor = 1/6

Maximum Application Working Pressure = 1800 PSI x 0.86 x 1/6 =

258 psi

3. FLEXIBILITYVerify that the minimum bend radius of the hose is less than the bend

radius required. Remember that the hose’s minimum bend radius will

change with pressure. To determine the minimum bend radius refer to

the chart in Table #1 for the type of hose you intend to use. Match the

line for the hose’s I.D. with the pressure requirement of your hose to

find the recommended bend radius for our hoses

4. CHEMICAL COMPATIBILITY The material that you choose for the hose and braid must be

compatible with the media that will flow through the hose, as well

as the environment in which the hose is installed. When determining

chemical compatibility, be sure that you know the temperature and

concentration of the chemical or chemicals. Although there are many

resources to confirm chemical compatibility, two of the industry

standards that you may find useful are the National Association of

Corrosion Engineers (NACE) and the Compass Corrosion Guides.

5. ACCESSORIESOptional accessories include spring guards, protective covers and

insulating covers.

Select the right component for your safety The total design of the system must be taken into consideration when selecting components in order to ensure that your Ham-Let products provide safe, trouble-free operation. It is the responsibility of the system designer and the user to consider the compatibility of the materials, of the components and system, the function of the component, appropriate rating, and to insure proper installation, operation and maintenance.


329

TABLE # 1 : TECHNICAL INFORMATION -

MINIMUM BEND RADIUS (FOR HHF)

To calculate a working pressure de-rated for elevated temperatures, multiply the hose working pressure shown in the catalog by the appropriate de-rating factor shown in Table #2.Note: The working pressure of an assembly at elevated temperatures may be affected by fitting type, material and method of attachment.

TABLE # 2 :

WORKING PRESSURE

DE-RATING FACTOR

TemperatureIn degrees F

321/316/316L 304

70 1.00 1.00

150 0.97 0.96

200 0.94 0.92

250 0.92 0.91

300 0.88 0.86

350 0.86 0.85

400 0.83 0.82

450 0.81 0.80

500 0.78 0.77

600 0.74 0.73

700 0.70 0.69

800 0.66 0.64

900 0.62 0.58

1000 0.60

1100 0.58

1200 0.55

1300 0.50

1400 0.44

1500 0.40

SPECS: All Flexible Metal Hoses are manufactured in compliance with the NAHAD National Association of Hose and Accessories Distributors:Standard ASC 001.01 RevisedFebruary 1996

HOSE PARAMETERS

Products ID TubeMaterial

BraidMaterial

AllowTemp. (ºF)

Max. AllowWork Press.at 70ºF (psi)

Rated Impulse Pressure

(psi)

Min. BurstPressure

(psi)

Min. Dynamic

Bend Radius (in)

Min. Static Bend Radius

(in)

HHF 1/4 1/4 316L 304 1500 1800 900 7233 4.5 1.0

HHF 3/8 3/8 316L 304 1500 1558 779 6230 5.0 1.2

HHF 1/2 1/2 316L 304 1500 1186 593 4743 5.5 1.5

HHFH 1/4 1/4 304 1500 4600 2300 18400 5.0 1.1

HHFH 3/8 3/8 304 1500 3800 1900 15200 5.5 1.4

HHFH 1/2 1/2 304 1500 2600 1300 10400 5.7 1.6

HHV 1/4 1/4 321 N/A 1500 90

HHV 3/8 3/8 321 N/A 1500 70

HHV 1/2 1/2 321 N/A 1500 70

Flexible Metal Hose HHF Series

High Pressure Flexible Metal Hose HHFH Series

Vacuum Flex Hose HHV Series

ORDERING INFORMATION

Hose

HH

Material

P - St.St.

Type

F - Flexible MetalV - Flexible Metal- VacuumFH - Flexible Metal- High Pressure

Options

HLT - Hellium Leak Test

O2 - Oxygen Cleaning

End Connection

LK - LET-LOK®

GF - Female Face SealMP - Male PipeGM - Male Face SealTS - Tube Stub

Size

1/4*3/8*1/2*

Size

1/43/81/2

OverallLength

12*18*24*36*

* Standard Sizes and Lengths. Other Hose Sizes, Materials, End Connections and Lengths are available.

Examples: P - HHF1/4 - LK1/4 - LK1/4 - 18 SS - HHV3/8 - TS1/4 - TS3/8 - 24 P - HHFH1/2 - GF1/2 - GF1/2 - 36 - HLT

HH 5/2002 REV.1.3900145

ALL HOSES ARE 100% FACTORY LEAK TESTED


330

TEFLON® FLEXIBLE HOSESSTAINLESS STEEL BRAIDED

TEFLON® FLEXIBLE HOSES HHT&HHTS SERIES

332

Basic Structure:HHT-Stainless Steel Braided Teflon®.

High Flexibility The highest flexibility available in sizes 1/2”, 3/4” and 1” inside

diameter

Tighter bends are possible - more ‘true’ application use without

damage

Less force-to-bend - hose does not flatten in the bend area, thus is

not susceptible to kink or vacuum collapse.

Full Size Inside Diameter:

Not tube size!

1/4” is 0.250 (1/4”) inside diameter - not 0.187 (3/16”) id and 1/2” is

0.500 (1/2”) not 0.406 (13/32”)

HAM-LET’s hose yields the highest flow rate per size because of its

full size tube so fittings can be machined with a bigger

inside diameter; a diameter that mates identically with connected

tubing.

The result is minimal or no pressure drop due to dimensional differences.

The internal surface of the fitting can be machined with no steps, which

is where corrosion starts, bacterial growth begins, flow is disrupted.

HAM-LET hoses are made of Dupont Teflon® T-62 as its core resin

material. This particular resin has superior flex characteristics, and thus

better kink resistance.

T-62 is validated for high purity service.1. Approved U.S. Pharmacopoeia Class VI

2. Approved Food and Drug Administration (FDA) 21CFR177.1550

3. Exceeds 3A Sanitary Standards

4. U.S.D.A. Approved

TEFLON®FLEXIBLE HOSES

GENERALThe Teflon® hose is the ideal solution for permanent or temporary connections. It makes fabrication easier, and it facilitates connect/disconnect and cleaning. Variable length, high flexibility, high pressures and broad chemical compatibility are among the features that make this hose suitable for any application. HAM-LET Teflon® hoses are available in single stainless-steel braid or double–fiberglass & stainless-steel braid.

TECHNICAL DATAHose diameters available: 1/4, 3/8, 1/2, 3/4, 1” Pressure rating: 1000 through 3200 psi (70 ~ 220 bar)Temperature rating: -100º ~ +450º F (-73º ~ + 232ºC) End connectors available: LET-LOK®, ONE-LOK®, Male & Female Face-Seal, Male NPT, Mini and Standard Sanitary Flange.

TEFLON® is a Registered trademark of Dupont

WHERE CAN A TEFLON® HOSE BE USED? HAM-LET TEFLON® HOSE FEATURES:

Almost anywhere! It can handle high pressures; it withstands hundreds

of thousands of flex cycles; it is unaffected by weather or age; and

it conveys almost any media. Teflon® is non-stick and temperature

resistant. Steam clean/sterilization cycles are practically not limited.

There is no material with a broader range of chemical compatibility

than Teflon®. The only known classes of chemicals that attack Teflon®

are molten alkali metals such as Sodium, Lithium, and Potassium.

Halogenated chemicals such as fluorine gas or chlorine tri-fluoride

are not recommended because certain Halogen compounds such as

Freon can permeate (diffuse) through tubing of Teflon®.

Chemical compatibility:Teflon® has one of the highest levels of chemical compatibility.

Following is the list of materials that require some level of

consideration:

The following materials are not recommended for use with Teflon® hosing:

Elemental Sodium

Elemental Potassium

Elemental Lithium

The materials listed below are only questionable if conveyed in conjunction with high temperature and pressure and/or a combination thereof:

Fluorine (F2)

Chlorine Tri-Fluoride (CIF3)

Borane (B2H6) (Only at 400°F to 500°F)

Iodine Pentafluoride

Oxygen Difluoride

Chlorine Difluoride

80% and over Sodium Hydroxide

Bromine (B2H6) - only at 400°F to 500°F

Aluminum Chloride (at elevated temps)

Ammonia (NH3)

Aluminum (R-NH2) - at elevated Temperature

Imines (R-NH)

70% Nitric Acid

80% Sodium Hydroxide

WALL THICKNESSSize 1/4” 3/8” 1/2” 3/4” 1”

Wall 0.043 0.043 0.050 0.052 0.052

333

TEFLON®FLEXIBLE HOSES

PACKAGINGEach hose is cleaned and packed in a PP bag individually.

WALL THICKNESS

HAM-LETPart No.

InsideDiameter

OutsideDiameter

M.A.W.P.* MinimumBend Redius

WeightPer

in mm in mm psi bar in mm LBS/FT KG/METER

HHT 1/4'' 0.25 6.4 0.45 11.4 3200 220 1.5 38 0.10 0.015

HHT 3/8'' 0.37 9.4 0.71 18.0 2500 172 2.0 51 0.12 0.18

HHT 1/2'' 0.50 12.7 0.89 22.6 1800 138 3.0 76 0.16 0.24

HHT 3/4'' 0.75 19.0 1.12 28.4 1500 103 3.5 89 0.46 0.68

HHT 1'' 1.00 25.4 1.55 39.4 1000 69 5.5 140 1.09 1.62

END CONNECTOR DIMENSIONS

HoseSize

MinimumFlow Diameter

TDiameter

ALength

AnLength

CLength

CnLength

HHex Size

in in in in in in in in

1/4 0.190 1/4 1.48 1.70 1.73 1.70 0.562

3/8 0.280 3/8 1.78 2.00 2.08 2.00 0.687

1/2 0.375 1/2 2.07 2.53 2.48 2.53 0.875

3/4 0.630 3/4 2.50 3.04 2.81 3.04 1.125

1 0.860 1 2.75 3.28 2.96 3.28 1.375

* 1. Proof pressure = 2xM.A.P 2. Burst pressure = 4xM.A.P

ORDERING INFORMATION

Hose

HH

Material

P

Type

T - Braided

2 st. EndConnection

LK - LET-LOK®

HL - ONE-LOK®

TS - Tube AdaptorMP - Male pipe NPTLF - Sanitary FlangeMS - Mini SanitaryHF - Female flare 37°(JIC)

1 st. EndConnection

LK - LET-LOK®

HL - ONE-LOK®

TS - Tube AdaptorMP - Male pipe NPTLF - Sanitary FlangeMS - Mini SanitaryHF - Female flare 37°(JIC)

Size

1/43/81/23/41

Size

1/43/81/23/41

Size

1/43/81/23/41

OverallLenght

OPTIONAL

C - Conductive Hose

flexible hose

Documents