... Automatuc Pipe Welding Machine Automatic root/fill/cap pass Automatic Small Pipe Welding Station (1"-8"); Automatic Pipe Welder; ... Engineering, Petrol Steel, CNPC, SINOPEC, CNOOC, CNCEC, etc.Automatic small pipe welding station consists of welding manipulator, elbow welding machine ... More than 99% qualified first X-ray test. Automatic Small Pipe Welding Station (1"-8"); Automatic Pipe Welder; Automatuc ...