1,api 5l/astm a106/a53 gr.b;api 5ct. 2, ... . 4,API 5CT-1043, API 5L-0699 Linzhou Fengbao Pipe Industry Co.,Ltd. as a seamless pipe manufacturer in the worldwide marketplace specializes ... ,L320,L360,L390,L415GB/T9711.1GB/T9711.2ISO3183-1ISO3183-2PSL 1:A,B,X42,X46,X52APL Spec 5LBASTM A53ASTM A106Casing and ... get passed. Manufacturing MethodHot rolled seamlessSize (OD)4-1/2”,5”,5-1/2”,6-5/8”,7”,7-5/8”8 ...