1. Standard: API 5L
2. Excellent to earthquake and directionless horizontal force due to circular section.
3. Easy design as the outer diameter and thickness are various and excellent four direction bending
4. Minimized risk for accident due to powerful bearing force and hardness.
5. Strong resistance against left and right refractive power.
6. For manufacture of mechanical structure, fluid tubes, super heaters of boiler, heat exchangers, condenser, catalytic tubes etc.
7. Material: A/B/X42/X46/X52/X56/X60/X65/X70/X80