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 |
