• Alloy steel pipe
  • Ductile Iron Pipe
  • Carbon Steel Pipe
  • OCTG Steel Pipe
  • Stainless Steel Pipe
contact us

Address:Beijing Road, Yunhe District, Shengji Building #1802 ,Cangzhou City, Hebei




  • JIS G3458 STPA22 Alloy Steel Pipes
E-mail: *
Content: *
Verification Code:

  • JIS G3458 STPA22 Alloy Steel Pipes
    JIS G3458 STPA22 Alloy Steel Pipes mainly used form high temperature service. 
    This Japanese Industrial Standard specifies the alloy steel pipes,mainly used form high temperature service. 

    JIS G3458 STPA22 Alloy Steel Pipes Quick Details
    Type:Seamless; Hot finished,Cold finished
    Wall thickness(WT): 12.7mm——26 mm.
    Outer diameter (OD): 19.05mm——219.1mm
    Length: 6M or specified length as required.
    Ends: Plain End, Beveled End, Treaded
    Additional Info
    Port of Shipment: Tianjin, China
    Payment Terms:T / T, LC
    Delivery: 7-15 days after payment
    Surface: Tubes will be varnished (Outside only) to prevent rust.
    Marking: Standard + Steel Grade + Size + Heat No + Lot No
    Package:Standard export package,suit for all kinds of transport, or as required

     Pipes are manufactured seamlessly and the finishing method is as per Table 1.
    Table 1-manufacturing methods
    Grades Symbol indicating the manufacturing method
    Pipe making method Finishing method Display of symbols representing manufacturing methods
    Chrome molybdenum steel pipe STPA22 No seam: S Hot finish: H
    Cold finish: C
    A note representing the manufacturing method
    The indication of the item is according to Clause 12 b).
    The pipe is subjected to the heat treatment in Table 2. 
    Table 2-Heat treatment

    Grades Heat treatment
    STPA22 Low temperature annealing, isothermal annealing, full annealing, or normalizing and post tempering
    The end of the pipe is plain end unless otherwise specified. 

    Chemical composition of JIS G3458 STPA22
    Table 3-Chemical composition
    Letter symbol of grade Chemical Composition %
    C Si Mn P S Cr Mo
    STPA 22 0.15max. 0.50 max. 0.30~0.60 0.035 max. 0.035 max. 0.80~1.25 0.45~0.65

    Mechanical properties of JIS G3458 STPA22
    Table 4-Tensile strength, yield point or yield strength, and elongation

    Grade Mechanical properties
    Tensile strength Yield point or proofstress Elongation %
     kgf/mm2 {N/mm2}  kgf/mm2 {N/mm2} No. 11 or No.12 test piece No. 5 test piece No.4 test piece
    Longitudinal Transverse Longitudinal Transverse
    STPA 22 42{412}min. 21{206} min. 30 min. 25 min. 24 min. 19 min.

    Note 1N / mm2 = 1 MPa
    Note) For pipes with an outer diameter of less than 40 mm, the elongation values in this table do not apply. However, it must be recorded.

    Dimensional Tolerances
    Table 5 Tolerances on Outside Diameter, Wall Thickness and Deviation in Wall Thickness

    Division Tolerances on outside diameter Tolerances on wall thickness Tolerance on deviation in wall thickness
    Up to 50mm 【 0.5mm ≤Up to 4mm 【 0.5mm
    ≤4mm and over 【 12.5%
    Up to and incl. 20% of wall thickness

    steel pipe
    50mm and over, up to 160mm 【 1%
    160mm and over, up to 200mm 【 1.6mm
    200mm and over 【 0.8 %
    However, for pipes 350mm and over in diameter, the length of circumference may substitute as
    a basis for the tolerances. In this case, the tolerances shall be 【 0.5%.

    steel pipe
    Up to 40mm 【 0.4mm ≤Up to 2mm 【 0.2mm
    ≤2mm and over 【10%
    40mm and over 【 0.8%
    However, for pipes 350mm and over in diameter, the length of circumference may substitute as
    a basis for tolerances. Inthis case, the tolerances shall be 【 0.5%
    a) The pipe should be practically straight and at both ends perpendicular to the pipe axis.
    b) The inner and outer surfaces of the pipe shall be well finished and have no detrimental disadvantages in use.
    c) If surface treatment is to be carried out, it may be by grinder or machining.
    d) The marks of care must follow the shape of the tube smoothly.

    Analysis test
    Tensile test
    Flattening test
    Water pressure test or nondestructive test

    a) type of symbol
    b) a symbol representing a manufacturing method
    The symbols representing the manufacturing method are as follows. However,-may be blank.
    1) Hot finish seamless steel pipe -S-H
    2) Cold finish seamless steel pipe -S-C
    c) Dimensions. The dimensions are nominal diameter × nominal thickness, or outer diameter × thickness.
    Example 50A × Sch40 or 60.5 × 3.9
    d) Manufacturer name or its code
    e) Symbol indicating the designation of special quality regulations: Z (when designated)

    We will submit the inspection documents to the orderer. 


    HOME |  Company |  Product |  News |  KnowLedge |  Equipment |  Contact | 

    Technical Support:CZWLWL.COM  Address:Beijing Road, Yunhe District, Shengji Building #1802 ,Cangzhou City, Hebei

    Phone:86-15003171886   站长流量统计