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TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping

    Buy cheap TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping from wholesalers
     
    Buy cheap TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping from wholesalers
    • Buy cheap TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping from wholesalers
    • Buy cheap TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping from wholesalers
    • Buy cheap TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping from wholesalers
    • Buy cheap TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping from wholesalers
    • Buy cheap TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping from wholesalers

    TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping

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    Brand Name : TORICH
    Model Number : GB/18984
    Certification : ISO 9001,ISO 14001,TS 16949
    Price : negotiable
    Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram
    Supply Ability : 50000 tons/year
    Delivery Time : 30 days
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    TORICH GB/T 18984 Seamless Steel Tubes For Low Temperature Service Piping

    TORICH GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping


    Application:For Low-Temperature-Service Piping

    Material:16MnDG,10MnDG,09DG,09Mn2VDG,06Ni3MoDG
    Unit:mm

    Hot Roll(Extrusion,Expansion)Steel TubeCold Drawn(Roll) Steel Tube
    DiamensionToleranceDiamensionTolerance
    Ordinary Level PAHigh Level PCOrdinary Level PAHigh Level PC

    Nominal Outer Diameter
    D

    <76.1±1.25%D±0.60

    Nominal Outer Diameter
    D

    <12.7±0.30±0.10
    76.1~<139.7±0.8012.7~<38.1±0.30±0.15
    139.7~<273.1±1.5%D±1.2038.1~<88.9±0.40±0.30
    88.9~<139.7±0.9%D±0.40
    273.1~<323.9±1.60139.7~<203.2±0.80
    203.2~<219.1±1.10
    ≥323.9±0.6%D219.1~<323.9±1.60
    ≥323.9±0.5%D

    Nominal Wall Thinckness
    S

    All Wall Thickness

    +15%S
    -12.52%S

    ±12.5%S

    Nominal Wall Thinckness
    S

    All Wall Thickness

    +12.5%S
    -10%S

    ±10%S


    Permissible deviation tolerance of OD and WT

    ClassficationSteel sizePermissible tolerance
    W-HOD<351±1.0%D
    ≥351±1.25%D
    WT≤25±12.5%S
    W-COD≤30±0.20
    >30~50±0.30
    >50±0.75%D
    WT≤3

    +12.5%S
    -10%S

    >3±10%S




    Steel grade and chemical composition

    Steel gradeChemical composition/%
    CSiMnPSNiMoV
    16MnDG0.12~0.200.20~0.551.20~1.60≤0.025≤0.025
    10MnDG≤0.130.17~0.37≤1.35≤0.025≤0.025≤0.07
    09DG≤0.120.17~0.37≤0.95≤0.025≤0.025≤0.07
    09Mn2VDG≤0.120.17~0.37≤1.85≤0.025≤0.025≤0.12
    06Ni3MoDG≤0.080.17~0.37≤0.85≤0.025≤0.025≤0.05


    Longitudinal mechanical properties of steel tubes

    Steel grade

    Tensile strength
    /
    MPa

    Lower yield strength Rp0.2/MPaElongation A/
    S≤16mmS>16mmSample 1Sample 2Sample 3
    16MnDG490~665≥325≥315≥30
    10MnDG≥400≥240≥35
    09DG≥385≥210≥30
    09Mn2VDG≥450≥300≥30
    06Ni3MoDG≥455≥250≥30


    Testing items and sampling quantity of steel tubes

    NumberTesting itemsSampling quantity
    1Chemical composition1 sample from each furnace
    2Tensile test1 sample from each of two steel tubes on each batch
    3Hardness test1 sample from each of two steel tubes on each batch
    4Ultrasonic testingALL
    5Hydraulic testALL
































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