Polyamide Resin Refrigerant Hose

BESTYIELD Technology (Huizhou) Co., Ltd. is one of the leading manufacturers and suppliers of polyamide resin refrigerant hose in China, also supports customized service. Welcome to wholesale bulk polyamide resin refrigerant hose in stock here and get pricelist from our factory. For price consultation, contact us.

• Tube: PA (Polyamide/Nylon) - excellent gas barrier properties and chemical resistance to modern refrigerants including HFCs and HFOs
• Inside braid: Polyester fiber, Aramid fiber, Stainless steel wire - high-tensile reinforcement options rated for pressures up to 12 MPa, with stainless steel providing superior corrosion resistance in ammonia (R717) and CO2 (R744) systems
• Cover: PU (Polyurethane), smooth finish - exceptional abrasion resistance (3× longer than rubber covers in wear tests), oil and grease compatibility, and UV stability for outdoor condenser line routing
• Color: Black or multiple colors - standard black; custom colors available for high-pressure line identification per ISO 2041
• Temperature range: -40°C to +120°C - suitable for both low-temperature evaporator circuits and high-pressure discharge lines
• Compliance standards: RoHS, REACH, HF - halogen-free options available for low-GWP refrigerant systems
• Flame resistance rating: HB, V1, V2, V0, VW-1, EN45545 - comprehensive flame classification for building and transport applications

The 1202 series is engineered for high-pressure refrigerant circuits where system pressures exceed the capabilities of standard rubber hoses, operating at working pressures from 5.0 to 12.0 MPa depending on size. The PA (polyamide/nylon) tube provides an exceptional gas barrier that minimizes refrigerant permeation - critical for modern low-GWP refrigerants like R32, R1234yf, and R744 (CO2 ).

Stainless steel wire braid (304 or 316L) delivers the highest pressure containment in our refrigeration hose range, with burst pressures reaching 48 MPa for smaller diameters; this exceeds SAE J51 and EN 14380 requirements for refrigerant hose assemblies.

The PU (polyurethane) cover offers 3× the abrasion resistance of standard CR or EPDM covers, making it ideal for installations where hoses contact structural members, vibrate against brackets, or are routed through tight cable trays in commercial refrigeration racks.

Polyester and aramid braid options are available for applications where electrical conductivity of stainless steel is undesirable (e.g., near sensitive electronics or in areas with strict EMI requirements).

This series supports the industry transition to high-pressure natural refrigerants (CO2 transcritical systems operating at 8-12 MPa) and is compatible with POE, PAG, and mineral oils used with HFC, HFO, and natural refrigerants.

• CO2 transcritical refrigeration systems in supermarkets: the 1202 series handles discharge pressures of 8-12 MPa from booster compressors, connecting high-pressure racks to gas cooler/evaporator circuits; stainless steel braid resists CO2 permeation and hydrogen embrittlement that degrades copper and carbon steel lines.
• Industrial process refrigeration: ammonia (R717) systems in food processing plants, cold storage warehouses, and ice rinks; PA tube resists ammonia attack while stainless steel braid prevents stress corrosion cracking that affects brass and copper fittings in NH3 environments.
• Heat pump systems: high-temperature heat pumps for district heating and industrial process heat, where discharge temperatures of 90-120°C and pressures of 4-6 MPa require hoses that maintain integrity under combined thermal and pressure stress.
• Transport refrigeration: truck trailer and container reefers using CO2 or R452A refrigerants, where vibration from road travel and thermal cycling during defrost cycles demand hoses with excellent fatigue resistance; PU cover withstands road debris impact and salt spray exposure.
• Marine refrigeration: shipboard container reefer connections and fish processing plant ammonia systems, where EN45545 marine certification and stainless steel corrosion resistance are mandatory.

• 304 vs 316L stainless steel selection: 304 for general refrigerant service, 316L required for ammonia (R717) systems and marine/coastal environments where chloride exposure accelerates corrosion.
• Wire diameter and braid angle optimization: 0.15-0.25mm wire at 54° braid angle provides optimal balance of hoop strength (burst pressure) and axial flexibility (bend radius); higher braid angles increase flexibility but reduce pressure capacity.
• Fatigue life: stainless steel braid withstands >500,000 pressure cycles at 1.33× working pressure per SAE J1273, compared to <200,000 cycles for polyester braid in equivalent service.
• Electrical conductivity consideration: stainless steel braid provides EMI shielding (beneficial in industrial environments) but requires isolation from sensitive electronics; use polyester or aramid braid when electrical isolation is needed.
• Termination methods: stainless steel braid requires specialized crimping with stainless steel ferrules; we provide factory-assembled fittings with 100% crimp force verification and pull-test certification.

• Pressure rating selection: for CO2 transcritical systems (operating 8-12 MPa), specify 1202-01 to 1202-03 (12/10/8 MPa rated); for HFC subcritical systems (operating 2-4 MPa), 1202-04 to 1202-09 (5-6 MPa rated) provides adequate margin.
• Hose sizing for velocity control: maintain refrigerant velocity below 6 m/s in suction lines and 3.5 m/s in liquid lines to minimize pressure drop and noise; undersized hoses increase velocity and reduce system efficiency.
• Thermal expansion compensation: PA hoses expand 0.15mm per meter per °C temperature rise; in long runs (>2m) with large ΔT (>60°C), incorporate pre-formed S-bends or expansion loops to absorb growth without stressing fittings.
• Quick-disconnect compatibility: 1202 series compatible with Parker Hannifin 6000-series and Eaton Aeroquip FD-series quick couplers for CO2 service; specify EPDM O-rings for R134a/R410A and FKM O-rings for R32/R1234yf.
• Installation torque specification: stainless steel flare fittings torque to 25-35 N·m depending on size; use calibrated torque wrench and apply anti-seize compound to prevent galling.

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