... GRB, A53 GRB, API 5L,GRB, Spiral welded Carbon steel pipe Company NameShijiazhuang Beihai Pipe CO., ... LTDBusiness TypeMANUFACTURE AND EXPORTERProductspiral welded carbon steel pipe Alloy steel pipe Welded steel pipe stainless steel ... StandardGradeSpecificationsGB10#,20#,45#,16MnO.D.:1/2"-20"W.T.:SCH10-XXSLength:5-12mBSQ195,Q235,Q215,Q345ASTMA283 ... K-55,N-80OD:4.5"-13.375"W.T.:0.205"-0.514"Length:R1, ...