The Oilfield Coil Tubing is used circulating the oil and gas withing sections of the production plants. There are different material grades that are used in these applications. The Oilfield Casing And Tubing Manufacturers produce API specified grades such as 5CT and others. Different applications use different dimensions of Steel Pipe Suppliers Steel Tube Suppliers Steel Pipe API 5L Line Pipe . API 5L is the specification for line pipe . Federal Steel supply offers both seamless and welded API 5L line pipe . This carbon steel pipe is used for pipeline transportation systems. Our API 5L line pipe is only manufactured from premium mills in a variety of grades; B, X42, X52, X60, and X65 in both PSL-1