Line pipe is a kind of pipe that is made of high strength carbon steel. It is usually manufactured according to metallurgical specifications set by the American Petroleum Institute (API). There are two grade API 5L PSL1 and PSL2. The technical requests of PSL2 are higher than PSL1, some pipelines used for special conditions need to adopt PSL2. Line pipes are mainly used for the transportation of oil, natural gas and other fuels. Common line pipes are seamless pipe and welded pipe, and their pipe ends have flat ends, threaded ends and socket ends. The line pipes have different of diameters, ranging from 2 inches to 48 inches. For example, in most cases, the main pipeline carrying natural gas will require lines about 16 to 48 inches in diameter. Smaller lines that carry gas to and from main lines can be made up of pipes 6 to 16 inches in diameter. Product name: Line line, Seamless steel pipe API 5L; Standard: API 5L PSL2; Grades: B, X42, X52, X56, X60, X65, X70 and S (S for sour service, for example X70QS or NS); Size: 1/2 inch to 12 inch, 14 inch, 16 inch, 18 inch, 20 inch, and 24 inch for seamless; Wall thickness: SCH 10, SCH 20, SCH 30, SCH 40, STD, XS, SCH 60, SCH 80, SCH 100, SCH120, SCH160, XXS; Length Range: 20 FT (6 meter), 40FT (12 meter)or customized; Ends Type: Beveled ends, Plain ends; End Protection: plastic Caps or iron Caps; Surface Coatings: Natural, Varnished, Black painting, 3PP, FBE and 3PE, Cladding and Lined etc.