| Production | steel pipe | 
| Brand | HAIHAO | 
| Specification | OD21.3-273.9mm | 
| Standard | GB AISI DIN JIS.etc | 
| Grade | ASTM A106/A53 ASTM A192 API5L | 
| DIN17175 DIN1629 ST35.8/ST37/ST45/ST52 | |
| ASTMA210, ASTMA179 | |
| Length | As customers requirements | 
| Technique | Hot rolled | 
| Use of field | Low and middle pressure fluid transportation pipeline | 
| Petroleunm and natural gas industry | |
| Chemistry industry | |
| Electric industry | |
| Delivery time | 20-30days | 
| Supply | seamless steel pipe | 
| ERW steel pipe | |
| hot-galvanized steel pipe | |
| Certification | BV ISO9001 ISO9002 | 

astm a312 304 seam welded carbon steel pipe

