... A106 GRB, A53 GRB, API 5L,GRB, A106-B Seamless Steel Pipe Company NameShijiazhuang Beihai Pipe CO.,LTDBusiness ... machine part and so on. StandardGradeSpecificationsGB10#,20#,45#,16MnO.D.:1/2"-20"W.T.:SCH10-XXSLength:5-12mBSQ195 ... ,Q235,Q215,Q345ASTMA283-D,A135-A,A53-A,A106-A,A179-C,A214 ... -C,A192,A226,A315-B,A53-B,A178-C,A210-A-1,A210-CDINSt33,St37, ...