... ) Professional supplier of Seamless steel pipe 1.Commodity NameSeamless oil casing pipe2.StandardASTM A106 ,ASTM A53 ,API5L B , ... ,X56,X60,X65,X70, etc11.Usagefor petroleum/ natural gas pipeline , for conveying water,drainage,coal gas, mineral slurry and ... , liquid service, petroleum cracking, chemical fertilizer equipment, drawing-oil-equipment and structure purposes. About our company: Established in ...