Petroleum (LPG) Industrial Hoses | Parker | LP Gas Hose Stainless Steel Reinforced | 7231 Series


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) 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.

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 consquences. Series 7231 may be used for natural gas service, but ONLY under all 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 for use in 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

Black chloroprene; perforated wrapped finish

TEMPERATURE RANGE -40°F to 180°F (-40°C to 82°C) (Note: The hose construction is capable of this rating, but LP gas should NEVER be conveyed over 140°F/60°C)
INDUSTRY STANDARDS UL21; CAN/CGA-8.1-M86 Type I; optional DOT factory hose assembly testing and marking also available
  • LP gas, propane
  • Bulk loading/unloading, in-plant tank transfer
  • Petrochemical refineries
VACUUM Not recommended


Part #

ID (in) Reinf Braids
OD (in) Min Bend Rad (in) Max Rec WP (psi) Perm Cplg Rec*
7231-1001 1 1 1.500 12.0 350 43
7231-1251 1-1/4 1 1.750 16.5 350 43
7231-1501K 1-1/2 1 2.000 20.0 350 43, 71
7231-2002K 2 2 2.625 25.5 350 WC, 43, 71, 7661

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



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