1. material and standards: ASTM/API, API 5L/A106/316/316L/A53/SN1010/SN1020/SN1045/Q235/Q345; 2. SIZE: OD: 114mm-273mm, thickness: 3mm-14mm. 3. Surface treatment: Pickling, polishing, painting, ends protection. 4. Payment: 30% deposit by T/T after signed contract. The balance payment by T/T after got the b/l copy. 5. Productivity: 8000ton/Month.