... Standard GB/T8162 , GB/T8163 ,ASTM A53 ,ASTM A106 ,DIN1629 , API 5L Steel Grade GB/T8162 , GB/T8163:10#, 20#, 35 ... 162 St 37.0, St 44.0, St 52.0 API 5L A B X42,X46, X52, X60, X65, X70, X80 ASTM ... Size: OD 16mm - OD 426mm OCTG PIPE, OIL PIPELINE: Material:J55,K55,N80,P110,L80/Gr.B X42,X46,X52,X56 ... thickness:2.11mm -59.94mm Length:5-12m,customized Standards:API 5L,API5CT,ASTM A106,ANSI,ISO9001,DIN,EN,JIS. ...