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”) |
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 |