... -508 mm 3Grade:J55,K55,N80,L80 4Standard:API 5CT 5Thread:BTC,STC,LTC Oil casing pipeHuadong Industrial ... Large Diameter Pipe ,Coupling and all kinds of material Seamless Steel Pipe.Annual output near 200,000 Ton ... B36.10M-1996,API,ANSI,GB,MSS,JIS,DIN.Material:ASTM A106/A53 GRB/API 5L/ API 5CT/Q345/A335/ST37/ ... B36.10M-1996,API,ANSI,GB,MSS,JIS,DIN.Material:ASTM A106/A53 GRB/API 5L/ API 5CT/Q345/A335/ST37 ...