Air & Gas Hoses - How They Work

Figure 1: NBR hose suitable for air and gas

Air and gas hoses transport air and gas between different points, providing a reliable and efficient method of conveying these fluids over long distances. These hoses play a vital role in multiple industries, from powering pneumatic tools to delivering natural gas for heating and cooking. They are available in various materials, sizes, and designs to suit different applications and can offer flexibility, durability, and resistance to heat, chemicals, and abrasion. This article explores the materials used for their construction, their main features, and their applications.

Table of contents

Air and gas hose types

Air and gas hoses are differentiated by low and high pressure.

• Low-pressure hoses: Low-pressure hoses are designed for applications that require relatively low pressures, typically up to 300 PSI (20 bar). These hoses are often made of PVC (Poly Vinyl Chloride) or other lightweight materials and are flexible and easy to handle. Low-pressure hoses are used for gasses like acetylene, oxygen, butane/propane mix, natural gas, or neutral gas. They are commonly used in applications such as inflating tires, operating pneumatic tools, and supplying air to paint spray guns.
• High-pressure hoses: High-pressure hoses are designed to withstand higher pressures, typically up to several thousand PSI. These hoses are made of rubber, steel, or synthetic materials that are highly durable and resistant to abrasion and damage. High-pressure hoses are used in various applications, including hydraulic systems, gas transmission and distribution, and high-pressure pneumatic applications.

Media type

Knowing and understanding the media type is important when selecting the hose material and ensuring proper function.

Air hose

Air hoses should possess exceptional strength to withstand high pressure levels to prevent leakage and damage. To ensure the equipment operates smoothly, oil-based lubricants are occasionally introduced into the compressed air; hence, air hose materials should be resistant to oil.

Gas hose

The gasses transported in industrial facilities may be toxic and/or flammable. The gas hoses must be leak-proof and resistant to breaking. Failure to properly select the appropriate hose materials, pressure requirements, and fittings can be extremely hazardous in these facilities.

Materials

Various materials are available when selecting air and/or gas hoses suitable for an application.

Rubber hose

Rubber is a commonly used material for air and gas hoses as it is affordable compared to other materials. These hoses are known for their strength, flexibility, durability, and ability to withstand different levels of heat and temperature. Rubber compounds, such as EPDM (Ethylene Propylene Diene Monomer) and NBR (Nitrile Butadiene Rubber), are popular for air and gas hoses.

• EPDM rubber offers excellent resistance to heat, temperature, and ozone. However, rubber is unsuitable for applications requiring high purity as it cannot provide zero permeability. High-purity gasses are of better quality as they contain other gasses in considerably low proportion, and permeable materials may compromise the quality of such gasses by picking up contaminants.
• NBR is resistant to oil and chemicals. But, the material has a relatively lower resistance to heat and may not be suitable for applications that require high temperature resistance.

PVC hose

PVC is a widely used material for general-purpose air and gas hose applications. PVC hoses are inexpensive, durable, and lightweight. These hoses are a practical solution to use outdoors or at greater heights. However, they can curl or crack at colder temperatures.

PTFE hose

PTFE (Polytetrafluoroethylene) hoses are suitable for high-pressure industrial applications. They are durable, flexible, and economical. To achieve high purity in certain applications, PTFE can be subjected to a controlled temperature and pressure (a process known as 'post-sintering') to increase the number of molecular bonds, strengthen the hose, and thicken its walls. The outcome is a reduced likelihood of diffusion, which happens when gas molecules can escape through the hose's pores due to their small molecular weight.

All metal corrugated hoses

All metal corrugated hoses are generally used with gasses like hydrogen and helium that possess the risk of diffusion. These hoses have a metal corrugated inner core. They have zero permeability, so they are not exposed to gaseous diffusion. However, they are costly and much less flexible than other hoses.

Silicone hose

Silicone hoses are known for their flexibility and strength. They can operate in a wide temperature range, making them ideal for heating, cooling, and charged-air applications.

Table 1: Common gasses and their recommended hose materials

Gas (Application) Recommended hose material Air PVC, Rubber, Polyurethane Natural gas Stainless steel, PTFE Propane Rubber, Thermoplastic Oxygen PTFE, Stainless steel Acetylene Rubber, Thermoplastic Nitrogen PVC, Rubber, Polyurethane Carbon dioxide PVC, Rubber, Polyurethane

Figure 2: Silicone hose

Hose requirements

Different hose materials exhibit unique properties, so it's essential to understand the material properties for the specific application and media.

Gas diffusion

Hose materials like rubber and PTFE are permeable to some degree, allowing gas molecules to enter or escape through the pores of the hose. This outward gas diffusion results in a pressure drop, leading to excessive energy consumption and poor system performance. In applications involving flammable gasses, gas diffusion can be particularly hazardous. In addition, other gasses may enter the hoses, leading to contamination. To eliminate the risk of gas diffusion, use an all-corrugated metal hose. Post-sintered PTFE hoses are an excellent alternative to metal hoses.

Chemical stability

Air and gas hoses must withstand the chemical properties of any gasses they are exposed to. Selecting the appropriate hose material directly from your application requirements is essential, as a hose material may work for certain media but not others.

Environmental stability

Hose materials like rubber and PVC are not resistant to environmental factors like UV rays and extreme weather. When selecting a hose for your application, it's important to consider the external environment. For applications prone to UV rays and extreme temperatures, better options include EPDM, silicone, ETFE, and PTFE.

Applications

Air and gas hoses are used in various industrial applications. Scuba divers use these hoses attached to the oxygen tank for breathing purposes. Labs and industries also use these hoses for carrying different types of gasses or for applications like welding. Some of the more common applications are discussed below:

Welding

Gas hoses are used for various welding applications like assembly, brazing, cutting, fabrication, pre-heating, post-heating, soldering, etc. Rubber hoses are generally used for their strength and flexibility. Gasses used for welding applications generally include acetylene, hydrogen, helium, natural gas, propane, propylene, oxygen, etc.

Breathing air

Air hoses are used in medical and recreational applications to provide breathing air. A standard rubber hose cannot be used for such application as toxic hydrocarbons may enter the respiratory system. Generally, a food-grade polymer is used to avoid such potential health hazards.

Figure 3: Breathing air hose

Medical applications

Medical air hoses are specialized for use in medical environments, typically in hospitals or clinics. These hoses supply clean, dry, and compressed air to medical devices, such as ventilators, anesthesia machines, and other respiratory support equipment. These hoses are typically made of non-toxic, medical-grade materials and are designed to resist kinking, crushing, and puncturing.

Additional hose components

In addition to the hose itself, several components can be added to improve its performance and functionality. These components can be added during manufacturing or retrofitted onto an existing hose as needed. The specifications, like the pressure of the hose, material type, and diameter of the hose, play an important role in selecting these additional components.

Hose reels

Hose reels protect the hoses. Modern hose reels are retractable and provide complete encasing to the hose. These hose reels also help eliminate loose uncoiled hoses on the shop floor and reduce the risk of accidental damage to the hose.

Figure 4: Automatic hose reel for compressed air

Pressure gauge

An air pressure gauge or gas pressure gauge allows the user to monitor the system's pressure. This is important to ensure the pressure doesn't exceed the application requirements or other product specifications.

Fittings for gas and air hoses

To operate smoothly and safely, the fittings used must be capable of withstanding the required pressure. Typically, fittings made from brass, type 304/316 stainless steel, or zinc-plated steel are utilized due to their strength and durability. Additionally, it is important to ensure that the material used for the fittings is resistant to the corrosive effects of the gas to prevent any potential hazards.

Figure 5: Hose connection fitting

Standards

Air and gas hoses are utilized for various purposes, including industrial and medical applications. To ensure safety and adherence to applicable domestic and international regulations, it is crucial to meet the relevant standards. Reviewing the local standards to ensure compliance with air and gas hoses for their intended use is essential.

• EN 1762:2018 : Requirement for rubber hoses and assemblies for use with liquefied petroleum gas (LPG) in a liquid or gaseous state and for natural gas transfer.
• ISO 2398:2016 : Specification for textile-reinforced rubber hose for compressed air.
• ISO 3821:2019 : Requirement for rubber hoses for welding, cutting, and braising processes.
• 29 CFR 1910.134 Compliance in OSHA : Emphasizes respiratory protection and lists the air hoses safe for breathing purposes approved by The National Institute for Occupational Safety and Health (NIOSH).
• EN 559: 2003 : Specification for rubber hoses for welding and cutting.
• EN 14593-1:2018 : Overview of breathing air hose standards

FAQs

What is a pneumatic air hose?

An air compressor hose is designed to transport compressed air from one point to another. They are used in various applications, from filling tires to supplying breathing air for medical/recreational purposes. They are typically made from Rubber, PVC, Silicone, EPDM, or Metal.

Can you use a natural gas hose for propane?

No, a natural gas hose cannot be used for propane because natural gas and propane have different chemical properties and require various hoses. Natural gas hoses are designed to withstand lower pressure than propane hoses and have different fitting sizes and shapes.

Can you use an air hose for the fuel line?

No, air hoses are not designed to handle the chemical properties of the fuel, and using them for fuel lines can result in leakage or damage to the hose.

What type of hose is used for propane?

Propane gas hoses are usually made of rubber, thermoplastic, or PVC (polyvinyl chloride) materials, specifically designed for use with propane gas. The hose must be rated for the pressure of the propane gas, typically 350 psi or higher.

What are the differences between rubber hoses and PVC hoses?

Rubber hose is more durable and can withstand high temperatures and pressure, while PVC hose is more affordable and suitable for lighter-duty applications. Rubber hose also has better chemical resistance, while PVC hose is more flexible and easier to handle.

Gas Hose

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LP Gas Hose

UL21, CGA Type I

Series 7132

Series 7132 is a flexible, lightweight liquefied petroleum gas (LPG)/propane delivery and transfer hose. The hose meets all Underwriters Laboratories (UL21) and Canadian Gas Association (CGA Type I) requirements. The construction incorporates multiple textile plies of reinforcement for flexibility and kink resistance. The perforated cover is resistant to mild chemicals, oil and ozone. Series 7132 is available in long lengths on reels, long cut lengths and factory-tested assemblies from stock in popular configurations.

Series 7132 and DOT:LPG hose assemblies installed on on-road vehicles must meet Department of Transportation (DOT) requirements. Factory assemblies (3/4" and larger) are pressure tested, one of the fittings is etched with a unique DOT certification number, and a document incorporating the identical certification number accompanies each assembly. Metal DOT identification bands are also available/attached for an additional charge at customer request.

Series 7132 and Natural Gas: The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences. Series 7132 may be used for natural gas service, but ONLY under.

ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series 7132 is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, non-permeable tubing or hose with barrier constructions to convey natural gas whenever possible.

Series 7132 and Compressed Natural Gas (CNG): Series 7132 is not for use in any CNG application, including fuel dispensing, on-board vehicle fuel lines, or fuel transfer. Series 7132 and Anhydrous Ammonia (NH3): Series 7132 is not for use with anhydrous ammonia.

Tube: Black nitrile
Reinforcement:Multiple textile plies
Cover:Black chloroprene; perforated smooth finish
Temp. Range: -40°F to +180°F (-40°C to +82°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C)
Brand Method: Impression
Brand Example: PARKER SERIES 7132 (ID) CSA® CAN 1-8.1 CGA TYPE I CAUTION – LP GAS HOSE MH6737 C U ® US ISSUE NO. XXXXXX 350 PSI MAX WP MADE IN USA (DATE CODE)
Design Factor: 5:1
Industry Standards: UL21; CAN/CGA–8.1–M86 Type I; optional DOT factory hose assembly testing and marking also available for sizes smaller than 3/4". Contact Parker.
Applications:

• LP gas/propane
• Cookers, grills, heaters, weed burners; delivery, transfer
• Agriculture, commercial and residential heating, construction, general industrial

Vacuum: Not recommended
Compare to: Boston Blackline (LPG); Gates LP350; Thermoid Type 75
Packaging: Cartons, coils, reels (“E” suffix in part number indicates UPS-shippable reel under 80 pounds)

Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Min Bend Rad (in)

Min Bend Rad(mm)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

7132-19352

3/16

4.8

2

0.510

13.0

0.11

0.05

2.0

50.8

350

24.1

*

800

N

7132-25354

1/4

6.4

4

0.610

15.5

0.15

0.07

2.5

63.5

350

24.1

7661

750

Y

7132-25354E

1/4

6.4

4

0.610

15.5

0.15

0.07

2.5

63.5

350

24.1

7661

350

Y

7132-38354

3/8

9.5

4

0.760

19.1

0.22

0.10

3.5

88.9

350

24.1

HY

600

Y

7132-38354E

3/8

9.5

4

0.760

19.1

0.22

0.10

3.5

88.9

350

24.1

HY

300

Y

7132-50354

1/2

12.7

4

0.937

23.8

0.32

0.15

4.5

114.3

350

24.1

7661

500

Y

7132-75354

3/4

19.1

4

1.250

31.8

0.50

0.23

6.5

165.1

350

24.1

HY

350

Y

7132-75354100

3/4

19.1

4

1.250

31.8

0.50

0.23

6.5

165.1

350

24.1

HY

2 x 100

Y

7132-75354125

3/4

19.1

4

1.250

31.8

0.50

0.23

6.5

165.1

350

24.1

HY

1 x 125

Y

7132-75354150

3/4

19.1

4

1.250

31.8

0.50

0.23

6.5

165.1

350

24.1

HY

1 x 150

Y

7132-75354200

3/4

19.1

4

1.250

31.8

0.50

0.23

6.5

165.1

350

24.1

HY

1 x 200

Y

7132-100354

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

300

Y

7132-100354100

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

100

Y

7132-100354125

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

1 x 125

Y

7132-100354150

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

1 x 150

Y

7132-100354200

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

200

Y

LP Gas Hose –1 Factory Assemblies

UL21 / CGA Type I

Series 7132

Crimped-on Carbon Steel Couplings, Rigid Male NPT Thread x Rigid Male NPT Thread Cartons

Factory assemblies (3/4” and larger) are Department of Transportation (DOT) pressure-tested, one of the fittings is etched with a unique DOT certification number, and a document incorporating the identical certification number accompanies each assembly. Metal DOT identification bands are also available/attached at an additional charge per customer request.

Part Number

ID (in)

ID (mm)

Length (ft)

Length (mtrs)

Approx Wt (lbs/ea)

Approx Wt (kg/ea)

Std Pack Qty (ea)

Stock Status **

7132TY08MP-72

1/2

12.7

6

1.83

2.53

1.15

1

Y

7132TY08MP-96

1/2

12.7

8

2.44

3.17

1.44

10

Y

7132TY08MP-120

1/2

12.7

10

3.05

3.82

1.73

10

Y

7132TY08MP-144

1/2

12.7

12

3.66

4.46

2.02

10

Y

7132TY08MP-180

1/2

12.7

15

4.57

5.42

2.46

10

Y

7132TY08MP-216

1/2

12.7

18

5.49

6.39

2.90

10

Y

7132TY08MP-240

1/2

12.7

20

6.10

7.03

3.19

10

Y

7132TY08MP-300

1/2

12.7

25

7.62

8.64

3.92

10

Y

7132TY08MP-600

1/2

12.7

50

15.24

16.68

7.57

10

Y

7132TY08MP-1200

1/2

12.7

100

30.48

32.75

14.86

1

Y

7132HY12MP-12

3/4

19.1

1

0.30

1.31

0.59

1

Y

7132HY12MP-36

3/4

19.1

3

0.91

2.34

1.06

8

Y

7132HY12MP-120

3/4

19.1

10

3.05

5.92

2.69

8

Y

7132HY12MP-144

3/4

19.1

12

3.66

6.95

3.15

10

Y

7132HY12MP-180

3/4

19.1

15

4.57

8.48

3.85

10

Y

7132HY12MP-216

3/4

19.1

18

5.49

10.02

4.55

1

Y

7132HY12MP-300

3/4

19.1

25

7.62

13.61

6.17

1

Y

7132HY12MP-1200

3/4

19.1

100

30.48

52.03

23.60

1

N

7132HY12MP-1500

3/4

19.1

125

38.10

64.84

29.41

1

N

7132HY12MP-1800

3/4

19.1

150

45.70

77.65

35.22

1

Y

7132LAR16MP-1200

1

25.4

100

30.48

65.06

29.51

1

Y

7132LAR16MP-1500

1

25.4

125

38.10

80.98

36.73

1

Y

7132LAR16MP-1800

1

25.4

150

45.70

96.90

43.95

1

Y

7132LAR16MP-2100

1

25.4

175

53.34

112.81

51.17

1

N

 

 

 

 

 

 

 

 

 

X-TREME™

Low Temperature LP Gas Hose

UL21, CGA Type I

Series 7132XTC

Series 7132XTC is a flexible, lightweight, low temperature liquefied petroleum gas (LPG)/propane delivery and transfer hose. The hose meets all Underwriters Laboratories (UL21) and Canadian Gas Association (CGA Type I) requirements. The construction stays flexible to -65°F (-53°C) and incorporates multiple textile plies of reinforcement for flexibility and kink resistance. The perforated cover is resistant to mild chemicals, oil and ozone. Series 7132XTC is available in long lengths on reels, long cut lengths and factory-tested assemblies from stock in popular configurations.
Series 7132XTC and DOT: LPG hose assemblies installed on on-road vehicles must meet Department of Transportation (DOT) requirements. Factory assemblies (3/4" and larger) are pressure tested, one of the fittings is etched with a unique DOT certification number, and a document incorporating the identical certification number accompanies each shipment. Metal DOT identification bands are also attached at an additional charge per customer request.
Series 7132XTC and Natural Gas: The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences. Series 7132XTC may be used for natural gas service, but ONLY under
ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series 7132XTC is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, non-permeable tubing or hose with barrier constructions to convey natural gas whenever possible.

Series 7132XTC and Compressed Natural Gas (CNG): Series 7132XTC is not for use in any CNG application, including fuel dispensing, on-board vehicle fuel lines, or fuel transfer. Series 7132XTC and Anhydrous Ammonia (NH3): Series 7132XTC is not for use with anhydrous ammonia.
Tube:Black nitrile
Reinforcement: Multiple textile plies
Cover: Black chloroprene; perforated smooth finish
Temp. Range:-65°F to +180°F (-53°C to +82°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C)
Brand Method:Impression
Brand Example:PARKER SERIES 7132XTC X-TREME CGA TYPE I CAUTION – LP GAS HOSE (–65°F) MH6737 C U ® US ISSUE NO. XXXXX 350 PSI MAX WP MADE IN USA B2 (DATE CODE)
Design Factor:5:1
Industry Standards: UL21; CAN/CGA–8.1–M86 Type I; optional DOT factory hose assembly testing and marking also available for sizes smaller than 3/4”. Contact Parker.
Applications:

• LP gas/propane
• Low temperature delivery, transfer
• Agriculture, commercial and residential heating, construction, general industrial

Vacuum:Not recommended
Compare to:Thermoid Polarflex
Packaging: Cartons, coils, reels

Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Min Bend Rad (in)

Min Bend Rad(mm)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

7132XTC-25354

1/4

6.4

4

0.610

15.5

0.14

0.06

2.5

63.5

350

24.1

7661

750

Y

7132XTC-38354

3/8

9.5

4

0.760

19.3

0.21

0.10

3.5

88.9

350

24.1

HY

650

N

7132XTC-50354

1/2

12.7

4

0.937

23.8

0.30

0.14

4.5

114.3

350

24.1

7661

500

N

7132XTC-75354

3/4

19.1

4

1.250

31.8

0.48

0.22

6.5

165.1

350

24.1

HY

350

Y

7132XTC-1000

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

250

Y

7132XTC-1000100

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

1 x 100

Y

7132XTC-1000125

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

1 x 125

Y

7132XTC-1000150

1

25.4

4

1.500

38.1

0.63

0.29

7.5

190.5

350

24.1

7661

1 x 150

Y

* Couplings: Refer to CrimpSource at www.safehose.com for coupling recommendations and crimp specifications.
** Stock: “Y” indicates stocked item; “N” indicates non-stocked item. Stock status subject to change. Contact Parker Customer Service.

LP Gas Hose – Factory Assemblies

UL21 / CGA Type I – Low Temperature

Series 7132XTC

Crimped-on Carbon Steel Couplings, Rigid Male NPT Thread x Rigid Male NPT Thread Cartons

Factory assemblies (3/4" and larger) are Department of Transportation (DOT) pressure-tested, one of the fittings is etched with a unique DOT certification number, and a document incorporating the identical certification number accompanies each assembly. Metal DOT identification bands are also available/attached at an additional charge per customer request. Contact Parker.

Part Number

ID (in)

ID (mm)

Length (ft)

length (mtrs)

Approx Wt (lbs/ea)

Approx Wt (kg/ea)

Std Pack Qty (ea)

Stock Status **

7132XTCLAR16MP-1200

1

25.4

100

30.48

61.65

27.96

1

Y

7132XTCLAR16MP-1500

1

25.4

125

38.10

76.71

34.80

1

Y

7132XTCLAR16MP-1800

1

25.4

150

45.70

91.78

41.63

1

Y

LP Gas Hose

UL21, CGA Type I

Series 7232

Series 7232 is a large diameter, flexible liquefied petroleum gas (LPG)/propane transfer hose for large volume bulk loading/unloading and vibration-resistant onboard vehicle connections. The hose meets all Underwriters Laboratories (UL21) and Canadian Gas Association (CGA Type I) requirements. The construction incorporates multiple braids of textile reinforcement for kink resistance and superior coupling retention. The perforated cover is resistant to mild chemicals, oil and ozone. Series 7232 is available in long lengths and factory-tested assemblies in popular configurations.

Series 7232 and DOT: LPG hose assemblies installed on on-road vehicles must meet Department of Transportation (DOT) requirements. Factory assemblies (all sizes) are pressure tested, one of the fittings is etched with a unique DOT certification number, and a document incorporating the identical certification number accompanies each assembly. Metal DOT identification bands are also available/attached for an additional charge at customer request. Contact Parker.

Series 7232 and Natural Gas:The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences. Series 7232 may be used for natural gas service, but ONLY under ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series 7232 is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, non-permeable tubing or hose with barrier constructions to convey natural gas whenever possible.

Series 7232 and Compressed Natural Gas (CNG): Series 7232 is not to be used for any CNG application, including fuel dispensing, on-board vehicle fuel lines, or fuel transfer. Series 7232 and Anhydrous Ammonia (NH3): Series 7232 is not for use with anhydrous ammonia.
Tube: Black nitrile
Reinforcement:Multiple textile braids
Cover: Black chloroprene; perforated wrapped finish
Temp. Range:-40°F to +180°F (-40°C to +82°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C)
Brand Method: Side one:Embossed
Side two:Black text on yellow stripe Brand Example: Side one (Embossed):PARKER SERIES 7232 CGA TYPE I CAUTION – LP GAS HOSE MH6737 C UR ® US ISSUE NO. XXXX 350 PSI MAX WP MADE IN USA (DATE CODE) Side two (Stripe): PARKER LP GAS HOSE
Design Factor:5:1
Industry Standards: UL21; CAN/CGA–8.1–M86 Type I; optional DOT factory hose assembly testing and marking available. Contact Parker.
Applications:

• LP gas/propane
• Bulk loading/unloading, in-plant tank transfer, transport
• Agriculture, commercial and residential heating, construction, general industrial

Vacuum:Not recommended
Compare to:Boston Blackline (LPG); Gates LP350; Thermoid Type 65
Packaging: Cartons, reels

Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Min Bend Rad (in)

Min Bend Rad(mm)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

7232-1252

1-1/4

31.8

2

1.815

46.1

0.85

0.39

12.0

304.8

350

24.1

HY

300

Y

7232-1252100

1-1/4

31.8

2

1.815

46.1

0.85

0.39

12.0

304.8

350

24.1

HY

100

Y

7232-1503K

1-1/2

38.1

2

2.156

54.8

1.12

0.51

14.0

355.6

350

24.1

43

150

Y

7232-2003K

2

50.8

3

2.750

69.9

1.90

0.90

16.0

406.4

350

24.1

7661

150

Y

LP Gas Hose – Factory Assemblies

UL21 / CGA Type I

Series 7232

Crimped-on Carbon Steel Couplings, Rigid Male NPT Thread x Rigid Male NPT Thread Cartons
Factory assemblies (all sizes) are Department of Transportation (DOT) pressure-tested, one of the fittings is etched with a unique DOT certification number, and a document incorporating the identical certification number accompanies each assembly. Metal DOT identification bands are also available/attached at an additional charge per customer request. Contact Parker.

Part Number

ID (in)

ID (mm)

Length (ft)

length (mtrs)

Approx Wt (lbs/ea)

Approx Wt (kg/ea)

Std Pack Qty (ea)

Stock Status **

7232HY20MP-180

1-1/4

31.8

15

4.57

14.95

6.78

1

Y

7232LA32NP-144

2

50.8

12

3.66

27.84

12.63

1

Y

7232LA32NP-180

2

50.8

15

4.57

33.15

15.04

1

Y

7232LA32NP-228

2

50.8

19

5.79

40.23

18.25

1

Y

LP Gas Hose

Stainless Steel Reinforced

UL21, CGA Type I

Series 7231

Series 7231 is a large diameter, extremely durable liquefied petroleum gas (LPG)/propane transfer hose for bulk loading/unloading and vibration-resistant onboard vehicle connections. The hose meets all Underwriters Laboratories (UL21) requirements and Canadian Gas Association (CGA Type I) requirements. The construction incorporates high tensile corrosion resistant stainless steel braided reinforcement for superior strength, durability and kink resistance. The perforated cover is resistant to mild chemicals, oil and ozone. Series 7231 is available in long lengths and factory-tested assemblies in popular configurations.

Series 7231 and DOT: LPG hose assemblies installed on on-road vehicles must meet Department of Transportation (DOT) requirements. Factory assemblies (all sizes) are pressure tested, one of the fittings is etched with a unique DOT certification number, and a document incorporating the identical certification number accompanies each assembly. Metal DOT identification bands are also available/attached for an additional charge at customer request. Contact Parker.

Series 7231 and Natural Gas: The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences. Series 7231 may be used for natural gas service, but ONLY under ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series 7231 is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, non-permeable tubing or hose with barrier constructions to convey natural gas whenever possible.

Series 7231 and Compressed Natural Gas (CNG): Series 7231 is not to be used for any CNG application, including fuel dispensing, on-board vehicle fuel lines, or fuel transfer. Series 7231 and Anhydrous Ammonia (NH3): Series 7231 is not for use with anhydrous ammonia. Tube: Black nitrile
Reinforcement: One or multiple stainless steel braids
Cover: Black chloroprene; perforated wrapped finish
Temp. Range: -40°F to +180°F (-40°C to +82°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C)
Brand Method: Black text on blue stripe
Brand Example: PARKER SERIES 7231 CGA TYPE I CAUTION – LP GAS HOSE MH6737 C U ® US ISSUE NO.XXXX 350 PSI MAX WP MADE IN USA (DATE CODE)
Design Factor: 5:1
Industry Standards:UL21; CAN/CGA–8.1–M86 Type I; optional DOT factory hose assembly testing and marking available. Contact Parker.
Applications:

• LP gas/propane
• Bulk loading/unloading; in-plant tank transfer
• Petrochemical refineries

Vacuum:Not recommended
Packaging: Cartons

Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Min Bend Rad (in)

Min Bend Rad(mm)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

7231-1001

1

25.4

1

1.500

38.1

0.77

0.35

12.0

304.8

350

24.1

43

200

Y

7231-1251

1-1/4

31.8

1

1.750

44.5

0.97

0.44

16.5

419.1

350

24.1

43

100

Y

7231-1501K

1-1/2

38.1

1

2.000

50.8

1.12

0.51

20.0

508.0

350

24.1

43, 71

150

Y

7231-2002K

2

50.8

2

2.625

66.7

1.87

0.85

25.5

635.0

350

24.1

WC, 43, 71, 7661

150

Y

LP Gas Hose

Static Wire

ISO 2928-1986 (E)

Series SS106

Series SS106 is a large diameter, heavy duty liquefied petroleum gas (LPG)/propane transfer hose for large volume bulk loading/unloading. The hose construction incorporates multiple plies of textile reinforcement for flexibility and kink resistance, and the perforated cover is resistant to abrasion, oil and ozone. The hose meets ISO 2928-1986 (E) requirements.
NOTES:

• Not for applications requiring Underwriters Laboratories (UL) or Canadian Gas Association (CGA) performance or listing.
• Refer to the Safety and Technical section of this catalog for safety, handling and use information.

Series SS106 and Natural Gas: The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences.

Series SS106 may be used for natural gas service, but ONLY under ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series SS106 is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, nonpermeable tubing or hose with barrier constructions to convey natural gas whenever possible.

Series SS106 and Compressed Natural Gas (CNG): Series SS106 is not to be used for any CNG application, including fuel dispensing, on-board vehicle fuel lines, or fuel transfer. Series SS106 and Anhydrous Ammonia (NH3): Series SS106 is not for use with anhydrous ammonia.
Tube: Black nitrile
Reinforcement: Multiple textile plies with static wire
Cover: Black nitrile; perforated wrapped finish
Temp. Range:-40°F to +180°F (-40°C to +82°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C) Brand Method:Embossed
Brand Example:PARKER SERIES SS106 (ID) LPG HOSE ISO 2928-1986 (E) 20 BAR 350 PSI WP (DATE CODE) MADE IN USA
Design Factor:5:1
Industry Standards: ISO 2928-1986 (E)
Applications:

• LP gas/propane
• Bulk loading/unloading; in-plant tank transfer

Vacuum: Not recommended
Packaging:Coils

Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

SS106-1250

1-1/4

31.8

4

1.990

50.6

0.82

0.37

350

24.1

*

100

N

SS106-1500

1-1/2

38.1

4

2.240

56.9

0.98

0.44

350

24.1

*

100

N

SS106-2000

2

50.8

4

2.740

69.6

1.31

0.59

350

24.1

*

100

Y

SS106-2500

2-1/2

63.5

4

3.240

82.3

1.87

0.85

350

24.1

*

100

N

SS106-3000

3

76.2

4

3.740

95.0

2.53

1.15

350

24.1

*

100

N

SS106-4000

4

101.6

6

5.000

127.0

4.47

2.03

350

24.1

*

100

N

LP Gas Hose

Stainless Steel Reinforced – Rubber Cover UL21

Series 7233

Series 7233 is a rubber covered, small diameter, extremely durable liquefied petroleum gas (LPG)/propane transfer hose for applications such as fuel line hose on forklifts and utility equipment. The hose meets all Underwriter Laboratories (UL21) requirements. The construction incorporates high tensile stainless steel braided reinforcement for superior strength, durability and kink resistance. The perforated rubber cover is resistant to mild chemicals, oil and ozone. Series 7233 is qualified with Parker crimp couplings and is compatible with Parker Series 20 reattachable fittings.

Series 7233 and Natural Gas: The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences. Series 7233 may be used for natural gas service, but ONLY under ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series 7233 is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, nonpermeable tubing or hose with barrier constructions to convey natural gas whenever possible.

Series 7233 and Compressed Natural Gas (CNG): Series 7233 is not to be used for any CNG application, including fuel dispensing, on-board vehicle fuel lines, or fuel transfer. Tube: Black nitrile
Reinforcement:One stainless steel braid
Cover: Black chloroprene; perforated wrapped finish
Temp. Range:-40°F to +180°F (-40°C to +82°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C)
Brand Method: Embossed
Brand Example:PARKER SERIES 7233 SS CAUTION LP GAS HOSE U ® ISSUE NO. XXXX 350 PSI MAX WP 1750 PSI MIN BURST (DATE CODE)
Design Factor: 5:1
Industry Standards: UL21
Applications:

• LP gas/propane
• Fork lifts, utility equipment

Vacuum:Not recommended
Packaging: Reels

Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Min Rec Rad (psi)

Min Rec Rad (bar)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

7233-311

5/16

7.9

1

0.675

17.1

0.19

0.09

4.0

101.6

350

24.1

HY

500

Y

* Permanent Couplings: Refer to CrimpSource at www.safehose.com for coupling recommendations and crimp specifications. Reattachable Couplings: Parker Series 20. ** Stock: “Y” indicates stocked item; “N” indicates non-stocked item. Stock status subject to change. Contact Parker Customer Service.

LP Gas Hose

Stainless Steel Reinforced – Textile Cover UL21

Series 7243

Series 7243 is a textile-covered, small diameter, extremely durable liquefied petroleum gas (LPG)/propane transfer hose in applications such as fuel line hose on forklifts and utility equipment. The hose meets all Underwriter Laboratories (UL21) requirements. The construction incorporates high tensile stainless steel braided reinforcement for superior strength, durability and kink resistance. The textile cover is resistant to abrasion, mild chemicals, and ozone. Series 7243 is qualified with Parker crimp couplings and is compatible with Parker Series 20 field reattachable fittings.

Series 7243 and Natural Gas: The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences. Series 7243 may be used for natural gas service, but ONLY under ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series 7243 is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, non-permeable tubing or hose with barrier constructions to convey natural gas whenever possible.

Series 7243 and Compressed Natural Gas (CNG): Series 7243 is not to be used for any CNG application, including fuel dispensing, on-board vehicle fuel lines, or fuel transfer. Tube: Black nitrile
Reinforcement: One stainless steel braid
Cover: Black chloroprene-impregnated textile braid
Temp. Range: -40°F to +180°F (-40°C to +82°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C)
Brand Method: White ink with white dash/spiral stripe
Brand Example:Side one: PARKER SERIES 7243 SS CAUTION LP GAS HOSE MH6737 U ® ISSUE NO. XXXX 350 PSI MAX WP (DATE CODE)
Side Two: CAUTION FOR LP GAS USE ONLY 1750 PSI MIN BURST
Design Factor: 5:1
Industry Standards: UL21
Applications:

• LP gas/propane
• Fork lifts

Vacuum:Not recommended
Compare to: Gates Stainless Steel LPG
Packaging:Reels

Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Min Rec Rad (psi)

Min Rec Rad (bar)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

7243-251

1/4

6.4

1

0.581

14.8

0.13

0.06

1.7

43.2

350

24.1

HY

500

N

7243-311

5/16

7.9

1

0.675

17.1

0.18

0.08

2.0

50.8

350

24.1

HY

500

Y

7243-401

13/32

10.3

1

0.766

19.5

0.21

0.10

2.3

58.4

350

24.1

*

500

N

7243-501

1/2

12.7

1

0.922

23.4

0.29

0.13

2.8

71.1

350

24.1

*

500

N

LP Gas Hose

UL569, CSA

Series 7170

Series 7170 is a flexible, lightweight hose connector for transfer of liquefied petroleum gas (LPG)/propane in barbecue grills, portable heaters, weed burning apparatus and similar appliances. The hose meets all Underwriters Laboratories (UL569) and Canadian Standards Association (CSA) requirements. The construction incorporates multiple textile plies of reinforcement for flexibility and kink resistance. The perforated cover is resistant to mild chemicals, oil and ozone.

Series 7170 and Natural Gas: The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences. Series 7170 may be used for natural gas service, but ONLY under ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series 7170 is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, nonpermeable tubing or hose with barrier constructions to convey natural gas whenever possible.

Series 7170 and Compressed Natural Gas (CNG): Series 7170 is not for used in any CNG application, including fuel dispensing, on-board vehicle fuel lines, or fuel transfer. Tube:Black nitrile
Reinforcement:Multiple textile plies
Cover:Black chloroprene; perforated smooth finish
Temp. Range: -40°F to +180°F (-40°C to +82°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C)
Brand Method: Impression
Brand Example:PARKER SERIES 7170 (ID) CSA ® CAN 1–8.1 – CAUTION – LP GAS HOSE 5 PSI/350 PSI C U ® US MH11955 MADE IN USA (DATE CODE)
Design Factor: 5:1
Industry Standards:UL569; CAN/CGA-8.1-M86 Type I
Applications:

• LP gas/propane
• Cookers, grills, heaters, weed burners, small appliances
• Consumer, general industrial

Vacuum:Not recommended
Compare to:Thermoid Type 75
Packaging:Reels

* Couplings: Refer to CrimpSource at www.safehose.com for coupling recommendations and crimp specifications.

** Stock: “Y” indicates stocked item; “N” indicates non-stocked item. Stock status subject to change. Contact Parker Customer Service.

Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Min Rec Rad (psi)

Min Rec Rad (bar)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

7170-25354

1/4

6.4

4

0.610

15.5

0.16

0.07

2.5

63.5

350

24.1

7661

750

Y

7170-38354

3/8

9.5

4

0.760

19.3

0.22

0.10

3.5

88.9

350

24.1

HY

600

Y

LP Gas Vapor Hose

Series 7122

Series 7122 is a flexible, lightweight, light duty hose connector for transfer of LP Gas vapor in space heaters for chicken brooders and other light applications. The hose construction incorporates multiple textile plies of reinforcement for flexibility and kink resistance. The perforated cover is resistant to mild chemicals, oil and ozone.

• Do not use to transfer liquid LP gas, in gas grill or other applications requiring Underwriters Laboratories (UL) or Canadian Gas Association (CGA) performance or listing.
• Refer to the Safety and Technical section of this catalog for safety, handling and use information.

Series 7122 and Natural Gas: The molecules of natural gas are small, enhancing their ability to permeate through standard rubber hose constructions. The permeation process is more rapid as the working pressure increases, and natural gas accumulates with potentially dangerous consequences. Series 7122 may be used for natural gas service, but ONLY under ALL of the following conditions:

• The application must be in a well-ventilated environment: Outdoors, or indoors with significant continuous air movement.
• Series 7122 is not to replace fixed/rigid pipe where that material is more appropriate due to reduced permeation and overall strength and durability. Use rigid pipe, nonpermeable tubing or hose with barrier constructions to convey natural gas whenever possible.
Tube: Black nitrile
Reinforcement: Multiple textile plies
Cover: Red chloroprene; perforated smooth finish
Temp. Range: -20°F to +160°F (-29°C to +71°C) (The hose construction is capable of this rating, but LP Gas should NEVER be conveyed over 140°F/60°C)
Brand Method: Black ink
Brand Example:PARKER SERIES 7122 LPG VAPOR HOSE 125 PSI MAX WP MADE IN USA (DATE CODE)
Design Factor:4:1
Industry Standards: None applicable
Applications:
• LP gas ??? vapor ONLY
• Chicken brooders, space heaters
• Agriculture, light industrial
Vacuum: Not recommended
Compare to:Gates LPG Vapor
Packaging:Reels


Part Number

ID (in)

ID (mm)

Reinf Plies

OD(in)

OD (mm)

Approx Wt (lbs/ft)

Approx Wt (kg/ft)

Min Rec Rad (psi)

Min Rec Rad (bar)

Max Rec WP (psi)

Max Rec WP (bar)

Perm Cplg Rec *

Std Pack Qty (ft)

Stock Status **

7122-38200

3/8

9.5

2

0.656

16.7

0.15

0.07

3.8

96.5

125

8.6

HY

700

Y