| 1. | Carbon steel boiler and heat exchanger tubes
锅炉与热交换器用碳素钢管 |
| 2. | Carbon steel tubes for machine structural purposes
机械结构用碳素钢管 |
| 3. | Carbon steel tubes for general structural purposes
一般结构用碳素钢管 |
| 4. | Carbon steel pipes for high temperature service
高温管路用碳素钢管 |
| 5. | Carbon steel pipes for high pressure service
高压设备用碳素钢管 |
| 6. | Carbon steel tubes for building structure
建筑结构用碳素钢管 |
| 7. | Carbon steel pipes for pressure service
压力设备用碳素钢管 |
| 8. | Carbon steel pipes for ordinary piping
普通管系用碳素钢管 |
| 9. | Arc welded carbon steel pipes
电弧焊碳素钢管 |
| 10. | Seamless carbon steel tube
无缝碳素钢管 |
