China GB 3087 standard seamless boiler alloy steel pipe Low pressure Medium pressure Manufacturer and Supplier | Gold Sanon
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GB 3087 standard seamless boiler alloy steel pipe Low pressure Medium pressure

Kurze Beschreibung:

GB T3087-2008

Niederdruck-Mitteldruck-Kessel Rohr überhitztem Dampf Rohr hohe Qualität nahtloses Kohlenstoffstahlrohr

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.
  • Produktdetail

    FAQ

    Produkt Tags

    Überblick

    Standard: GB / T3087-2008

    Grade Gruppen: 10 #, 20 #

    Dicke: 1 - 100 mm

    Aussendurchmesser (rund): 10 - 1000 mm

    Länge: Feste Länge oder in Bahnen

    Abschnitt Form: Rund

    Place of Origin: China

    Zertifizierung: ISO9001: 2008

     

    Legierung oder nicht: nahtloser Kohlenstoffstahl

    Anwendung: Kesselrohr

    Oberflächenbehandlung: Als Anforderung des Kunden

    Technik: Warmgewalzte / kaltgezogen

    Wärmebehandlung: Normalisieren

    Special Pipe: Dickwandige Rohr

    Verwendung: Bau, Fluidtransport, Boiler und Wärmetauscher

    Test: ET / UT

    Anwendung

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

    Haupt Grade

    Grade von hochwertigen Kohlenstoffbaustahl: # 10, # 20

     

    chemische Komponenten

    Standard Klasse Chemische Zusammensetzung(%)
    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

    mechanische Immobilien

    Standard Stahlrohr Wandstärke Zugfestigkeit Streckgrenze Verlängerung
    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 Wandstärke Permissible deviation
    Cold drawn (rolled) steel tube ≤ 3 15 - 10 % S or ± 0.15, take the greater number
    > 3 + 12.5% S
    - 10% S

    Testanforderung

    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.

     

    Produktdetail


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