• GBT 3087 Seamless steel tube for low and medium pressure boiler

GB/T 3087 specifies the manufacture of the seamless steel tubes for various structures low and medium pressure boilers, such as superheated steam tubes for low and medium pressure boilers, boiling-water tubes and superheated steam tubes for locomotive boilers, big smoke tubes, small smoke tubes and arch brick tubes.

Specifications

Standard GB/T 3087
Steel Grade/Material 10, 20
Outer Diameter(OD) 1.5”-28”(38mm-720mm)
Wall Thickness(WT) 0.102”-2.362”(2.6mm-60mm)
Length 5.8-16m or OEM
Packing Plastic cap or bundling
Surface Treatmengt Black paint,3LPE,3LPP,FBE or OEM
Section Shape Round
Technique Seamless hot rolled
Application Superheated steam tubes for low and medium pressure boilers, boiling-water tubes and superheated steam tubes for locomotive boilers, big smoke tubes, small smoke tubes and arch brick tubes.
Place of Origin China
MOQ 25 ton
Transportation 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port
→America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea,
Australia…(shipping)

2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”)
Khorgos port(Пограничный пункт “Хоргос”)
→East Asia, Uzbekistan,Kazakhstan,Kyrgyzstan…(Train)
Erlianhot port→Mongolia(Train and Truck)
Manchuria port→Russia(Train and Truck)
Grade Chemical Components (%)
C Si Mn P S Cr Ni Cu
≤
10 0.07~0.13 0.17~0.37 0.35~0.65 0.035 0.035 0.10 0.30 0.25
20 0.17~0.23 0.17~0.37 0.35~0.65 0.035 0.035 0.15 0.30 0.25
Mechanical Properties
Grade Tensile strength(Rm/MPa) Lower yield strength(Rel/MPa) Elongation
(%)
Wall thickness/mm
≤16 ＞16
Not less than Not less than
10 335~475 205 195 24
20 410~550 245 235 20

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