Plumbing Steel Pipes

Our factory specializes in the production of various steel pipes and fittings (such as elbows, tees, flanges, etc.), offering custom sizes, materials, and workmanship. Made from high-quality materials such as carbon steel and stainless steel, our products are highly resistant to high pressures and offer excellent sealing properties. They are widely used in the petroleum, chemical, water supply, and construction piping systems, ensuring reliable quality.

◉ Product Details


  • Production Overview
Production Name: Polyurethane thermal insulation steel pipe
Materials: Stainless Steel/ Carbon Steel + PUR Form + PEH/HDPE/Galvanized/Aluminum etc
    Wall thickness: 0.5mm-16mm
    Length: 1m-12m or customized
    Outer Diameter:  0.405-80 inch or 10.3mm – 2032mm
    Insulation: PUR Foam
    Operating temperature: Up to 140℃
    Standard & Grades:
    • API 5L PSL1/ PSL2
    • ASTM A53,ASTM A252
    • GB/T9711.1
    • GB/T3091
    • SY/T 5037-2012
    • DIN1626
    • EN10219,EN10217
    Ends: 30~35°  beveled ends
    Quality control:  100% X-Ray inspection
                                100% Hydraulic Pressure test
                                100% Ultrasonic inspection
    Lining: Epoxy , cement motar,  and according to customers requirement
    Operating pressure: <1.6Mpa

    Laid way: Buried, overhead, trench
    Insulation material:
    • Fluoride-Free water foamed rigid polyurethane foam material (foam density: 60kg/m3-80kg/m³)
    Inner surface tension of the high density polyethylene pipe: ≥50dy/cm

    A pre-insulated pipe narmally consists of three parts:
    • Part 1: Carrier pipe (inside): stainless steel or carbon steel
    • Part 2: Insulating layer (Medium): Polyurethane foam (PUR Form)
    • Part 3: Protective jacket (outside casing): Plastic or Steel [Polyethylene (PEH), High Density Polythylene (HDPE), Galvanized, Aluminum etc] 
    Descriptionpolyurethane thermal insulation steel pipe
    Wall thickness0.5mm-16mm
    Length1m-12m or customized
    Outer Diameter0.405-80 inch or 10.3mm – 2032mm
    InsulationPUR Foam
    Operating temperatureUp to 140℃
    Standard & Grades

    ASTM A53,ASTM A252,GB/T9711.1,GB/T3091,SY/T 5037-2012,DIN1626,EN10219,EN10217

    Ends

    1) Beveled end

    2) Plain end

    Quality control

    100% X-Ray inspection100% Hydraulic Pressure test100% Ultrasonic inspection

    Pre-insulated pipe consists of three parts

    Part 1:  Carrier pipe (Inside): Stainless steel or Carbon steel

    Part 2:  Insulating layer (Medium): Polyurethane foam (PUR Form)

    Part 3:  Protective jacket (Outside casing): Plastic or steel (Polyethylene (PEH), High Density Polyethylene (HDPE), Galvanized, Aluminum etc)

    Lining

    Epoxy , cement motar,  and according to customers requirement

    Operating pressure<1.6Mpa
    Laid way

    Buried, overhead, trench

    Insulation materials

    Fluoride-Free water foamed rigid polyurethane foam material (foam density: 60kg/m3-80kg/m³)

    Inner surface tension of the

    high density polyethylene pipe

    		≥50dy/cm
    Advantagesimpact-proof, watertight, resistant to salt and chemicals, hygienic and non-corrosive
    Customized

    Carrier pipe, foam type and foam thickness, as well as the material for the jacket, can be customized according to the customer requirements

    Materials of Thermal Pre-insulated steel pipe with HDPE Jacket
    ItemMaterialNotes
    Service pipe/Carrier pipeSteel pipe

    API 5L PSL-1: GR.B X42, X46, X52, X60, X70

    API 5L PLS-2: ISO3183-L245, L290, L320, L360, L415, L485
    InsulationPolyurethane foam (PUR)  Nominal Density of 60⁺¹⁵̱₅ kg/m³Compressive Strength: ≥ 0.300 Mpa
    Thermal Conductivity: ≤ 0.029 W/m·K@50℃
    Closed Cell Content: ≥90%
    Water Absorption: <5%
    Insulation JacketHigh density polyethylene (HDPE)As technical parameter
    Main Indexes of Polyurethane insulation layer


    IndexesPreference standardUnitStandard requirement
    DensityCJ/T114-4.3.2kg/m³≥60
    AverageCJ/T114-4.3.1mm≤0.5
    Percentage of close areaCJ/T114-4.3.1%≥ 88
    Compressive strengthCJ/T114-4.3.3MPa≥ 0.3
    Water absorptionCJ/T114-4.3.5%Immersion in boiling water 90 minute,bubble water absorption should be not more than 10%
    CavityCJ/T114-4.3.1
    		≤ 0.033

    ◉ Product Show

    Specification of pre-insulated pipe
    SpecificationsSteel pipe OD*Thickness (mm)Outer protection tube diameter * wall thickness (mm)Insulation Thickness (mm)Unit weight (kgs/m)
    32/9032*2.890*2.526.53
    45/11045*2.8110*2.5304
    57/12057*3.0120*2.5296
    60/12560*3.5125*3.029.57
    76/14076*4.0140*3.0299
    89/16089*4.0160*3.032.511
    108/180108*4.0180*3.03313
    133/200133*4.5200*3.230.317
    159/250159*4.5250*3.941.622
    219/315219*6.0315*4.943.139
    273/365273*6.0365*5.640.449
    325/420325*7.0420*7.040.567
    377/500377*7.0500*7.853.781
    426/560426*7.0560*8.858.294
    478/600478*7.0600*8.852.2104
    529/630529*7.0630*9.840.7114
    529/655529*7.0655*9.853.2117
    630/760630*8.0760*11.553.5158
    720/850720*8.0850*12.053181
    820/960820*10.0960*14.056252
    920/1055920*10.01055*14.053.5281
    1020/11551020*10.01155*14.053.5312
    1220/13801220*12.01380*16.064444
    1420/16021420*14.01602*16.075590
    Advantage of the pre-insulated pipe
    1) Good insulation properties
    2) Low heat loss
    3) Heat loss is 25% of the traditional pipe
    4) Energy saving
    5) About 30 years move the service life, low cost
    6) Has a strong waterproof and corrosive resistance and high mechanical strength
    7) no attached trench, can be directly buried under ground or water


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