Spirally double-sided submerged arc welded pipe SSAW Steel Pipe Production Process: Coils stockyard-Strip inspection-Uncoil-Coller leveling-End cutting/end connection-Edge trimming/edge preparation-Cage-type roll forming-Inside welding/outside welding-Ultrasonic testing for weld seam-Cleaning-Inside weld TV visual inspection-Repair/X-ray film inspection/manual ultrasonic check-End cutting and beveling-Hydrostatic testing-Final visual and dimensional inspection/DNT/customer’s inspection/ultrasonic testing for weld seam-Length measuring and weighting-Cleaning and coating-Marking-Stockpiling-Marshalling and delivery Size range: Outside diameter:219.1mm-3000mm Wall thickness:5.0mm-30mm Application : For line pipe in petroleum and natural gas, water and gas, mineral slurry, Also for chemical industry, electric power engineering irrigation, building structure and pile driving etc. Production capacity: The SSAW Pipe Mill can produce welded pipes up to 400,000 tons a year. The company can produce various sizes of longitudinally and spirally welded steel pipes according to the following standards such as API ASTM JIS BS DIN and GB etc. And we can also process all sizes of steel strips according to customers’ requirement. Certificate of the company: API 5 l API 5 CT ASTM ISO9001:2000 CE The company can produce various sizes of longitudinally and spirally welded steel pipes according to the following standards such as API ASTM JIS BS DIN and GB etc. And we can also process all sizes of steel strips according to the requirement of customers.