... machines to guarantee the quality of our product including: X-RAY testing machine; 2000T hydrostatic testing machine; Automatic UT ... and oil.piling, etc.ProcessSprial Submerged-Arc Welded TypeSAWStandardAPI 5L,API 5CT,ASTM A53,ASTM A252,EN10217,EN10219,DIN,JIS,BSCertificateAPI ... Blow Test,Impact Test),Exterior Size Inspection,Hydrostatic Test.,X-ray testMill Test Certificate:EN 10204/3.1BContactsLinda ...