... API 5L/ISO9001 manufacture of Seamless cold-drawn or cold-rolled precision seamless steel pipe API 5CT/API 5L/ISO9001 ... A53 Gr.B,ASTM A179-C,A214-C,A192,A226,A315-B,A178-C,A210-A-13>STFA410, ... DIN1626 ST37,5>10#,20#,37Mn5,36Mn2V Other steel grade is available as per clients requirements. Ordinary ... are interested in our products.ContactGraceTianjin Jingtong Seamless Steel pipe Co.,Ltd.Address: 31#,2nd RD, ...