• page-banner2
  • page-bannner

GB 3087 standard seamless boiler alloy steel pipe Low pressure Medium pressure

Short Description:

GB T3087-2008

low pressure Medium pressure boiler pipe super heated steam pipe high quality seamless carbon steel pipe

Mainly for India market with IBR certification


  • Payment: 30% deposit, 70% L/C or B/L copy or 100% L/C at sight
  • Min.Order Quantity: 1 PC
  • Supply Ability: Annual 20000 Tons Inventory of Steel Pipe
  • Lead Time: 7-14 days if in stock, 30-45 days to produce
  • Packing: Black Vanishing, bevel and cap for every single pipe; OD below 219mm need to pack in bundle, and each bundle no exceed 2 tons.
  • Product Detail

    FAQ

    Product Tags

    Overview

    Standard: GB/T3087-2008

    Grade Group: 10#,20#

    Thickness: 1 - 100 mm

    Outer Diameter(Round): 10 - 1000 mm

    Length: Fixed length or random length

    Section Shape: Round

    Place of Origin: China

    Certification: ISO9001:2008

     

    Alloy Or Not: seamless carbon steel

    Application: Boiler Pipe

    Surface Treatment: As customer's requirement

    Technique: Hot Rolled/ cold drawn

    Heat treatment: Normalizing

    Special Pipe: Thick Wall Pipe

    Usage: Construction, Fluid Transportation, Boiler and Heat Exchanger

    Test: ET/UT

    Application

    It is mainly used to make high-quality carbon structural steel, low pressure medium pressure boiler pipe, super heated steam seamless carbon steel pipe

    Main Grade

    Grade of high-quality carbon structural steel: 10#,20#

     

    Chemical Component

    Standard Grade Chemical Composition(%)
    C Si Mn P S Cr Cu Ni
    GB3087 10 0.07~0.13 0.17~0.37 0.38~0.65 ≤0.030 ≤0.030 0.3~0.65 ≤0.25 ≤0.30
    20 0.17~0.23 0.17~0.37 0.38~0.65 ≤0.030 ≤0.030 0.3~0.65 ≤0.25 ≤0.30

    Mechanical Property

    Standard Steel pipe Wall thickness Tensile strength Yield Strength Elongation
    GB3087 (mm) (MPa) (MPa) %
    10 / 335~475 195 24
    20 <15 410~550 245 20
    ≥15 225

    Tolerance

    Permissible deviation of outer diameter of steel tubes

    Type of steel tube  Permissible deviation
    Hot rolled (extruded, expanded) steel tube ± 1.0% D or ± 0.50, take the greater number
    Cold drawn (rolled) steel tube ± 1.0% D or ± 0.30, take the greater number

    Permissible deviation of the wall thickness of hot rolled (extrusion, expansion) steel tubes

    Unit: mm

    Type of steel tube Outer diameter of steel tube S / D  Permissible deviation
    hot rolled (extruded) steel tube ≤ 102  – ± 12.5 % S or ± 0.40, take the greater number
    > 102 ≤ 0.05 ± 15% S or ± 0.40, take the greater number
    > 0.05 ~ 0.10  ± 12.5% S or ± 0.40, take the greater number
    > 0.10 + 12.5% S
    - 10% S
    hot expand steel tube + 15% S

    Permissible deviation of the wall thickness of cold drawn (rolled) steel tubes

    Unit: mm

    Type of steel tube Wall thickness Permissible deviation
    Cold drawn (rolled) steel tube ≤ 3 15 - 10 % S or ± 0.15, take the greater number
    > 3 + 12.5% S
    - 10% S

    Test Requirement

    Flattening test

    Steel tubes with an outer diameter greater than 22 mm and up to 400 mm, and wall thickness greater than 10 mm should undergo the flattening test. After the samples are flattened

    Bending test

    Steel tubes with an outer diameter not greater than 22 mm should undergo the bending test. The bending angle is 90o . The bending radius is 6 times the outer diameter of the steel tube.After bending the sample, no fissures or cracks are permitted to appear on the sample.

    Macroscopic examination

    For steel tubes directly made by continuously cast billets or steel ingots, the supplying party should guarantee that there are no white spots, impurities, sub-surface air bubbles, skull patches or layering on the cross-sectional acid pickled macroscopic tissue of the billet or steel tube.

    Non-destructive inspection

    According to the demanding party’s request, which is then negotiated between the supplying and demanding parties and indicated in the agreement, ultrasonic flaw detection may be individually performed for steel tubes. The longitudinal manual defect of the reference sample tube should meet the requirements for post-inspection acceptance grade C8 specified in GB/T 5777-1996.

     

    Product Detail


  • Previous:
  • Next:

  • Write your message here and send it to us