... 9 / 16.28, ASTM A53/A106, API 5L, ASME ... B36.10M---1996, DIN2605 / 2615 / 2616, JIS P2311/2312MaterialASTM A106,A53GRB,A53-A,A106-A,A192,A226,A315-B,A106-B,A178-C,A210-A ... B/L) Equipment Quality Control: Our products :carbon steel ,alloy steel ,stainless steel pipes and pipe fittingssuch as: long/short radius elbows(EL/ES),straight / reducing tee ... :welding ... Elbow, Tee, Union, Cross, Coupling, Cap ...