... .1mm-3040mm Wall Thickness 5-30mm Linda Lee 0086-18602645767 API X42 steel pipe Company Introduction Our company now has 5 ... continuous testing machine etc. We supply steel pipe more than 600,000 tons annual based on international standards.All these steel ... , and oil.piling, etc.ProcessSprial Submerged-Arc Welded TypeSAWStandardAPI 5L,API 5CT,ASTM A53,ASTM A252,EN10217,EN10219,DIN,JIS,BSCertificateAPI ...