... SSAW,LSAW,Seamless 5)Standard:ASTM,ANSI Type 1" carbon steel sch 80 pipe SizeSeamless Pipe: 1/2”~48”, DN15~DN1200, OD21.3MM~1219 ... so on.StandardsANSI B16.9 / 16.28, ASTM A53/A106, API 5L, ASME B36.10M---1996, DIN2605 / 2615 / 2616, JIS ... with the copy of B/L) Equipment Quality Control: Our products :carbon steel ,alloy steel ,stainless steel pipes and pipe fittingssuch as: long/short radius elbows ...