1,api 5l/astm a106/a53 gr.b;api 5ct. 2,ISO9001-2008/ISO11960 3 ... API 5CT-1043, API 5L-0699 Linzhou Fengbao Pipe Co.,Ltd. as a seamless pipe manufacturer in the worldwide marketplace ... .cfbpco.comLine pipe Namehigh quality API 5L Spec Gr.B seamless steel pipeApplication pipeline pipe, gas delivery pipe, ... API 5L/ASTM A106/A53 GR.BMaterial20#,Q345,B,X42,x46,x52Weight calculation formula(OD-WT)*WT*0 ...