1 seamless oil casing pipe 2 as per API 5L GrB/5CT J55,K55,N80,L80,P110 2 grade 10#-45# 3 the price is with competitive HEBEI SHENGTIAN(GROUP) SEAMLESS STEEL PIPE CO.,LTD.HEBEI HUIKE STEELPIPECO.,LTD (two both of our own) Professional supplier of Seamless steel pipe 1.Commodity NameSeamless oil casing pipe2.StandardASTM A106 ,ASTM A53 ,API5L B ,ASTM A179, ASTM A210 ,ANSI B36.10, GB 5310,GB6479, ...