China GB 3087 standard seamless boiler alloy steel pipe Low pressure Medium pressure Manufacturer and Supplier | Gold Sanon
  • Page-banner2
  • Page-Banniere

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

Brève description:

GB T3087-2008

basse pression moyenne tube de chaudière à pression tuyau de vapeur surchauffée haute qualité tuyau d'acier au carbone sans soudure

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.
  • Détail du produit

    FAQ

    Mots clés du produit

    Aperçu

    Standard: GB / T3087-2008

    Groupe Grade: 10 # 20 #

    Epaisseur: 1 - 100 mm

    Diamètre extérieur (rond): 10 - 1000 mm

    Longueur: Longueur fixe ou aléatoire longueur

    Section Forme: Rond

    Lieu d'origine: la Chine

    Certification: ISO9001: 2008

     

    Alliage ou non: acier au carbone sans soudure

    Application: Tuyau de chaudière

    Traitement de surface: Comme exigence du client

    Technique: laminés à chaud / froid dessiné

    Traitement thermique: Normaliser

    Tuyau spécial: paroi épaisse tuyau

    Utilisation: Construction, transport des fluides, chaudières et échangeurs de chaleur

    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

    principale catégorie

    Qualité de l'acier structurel carbone de haute qualité: 10 # 20 #

     

    Composant chimique

    la norme Classe Composition chimique(%)
    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

    Propriété mécanique

    la norme Tuyaux en acier épaisseur du mur Résistance à la traction rendement Force Élongation
    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 épaisseur du mur Permissible deviation
    Cold drawn (rolled) steel tube ≤ 3 15 - 10 % S or ± 0.15, take the greater number
    > 3 + 12.5% S
    - 10% S

    Exigence d'essai

    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.

     

    Détail du produit


  • Précédent:
  • Next:

  • Écrivez votre message ici et nous l'envoyer