Product Content Description:API 5CT covers steel pipes (casing, tubing and pup joints), coupling stock, coupling material and accessory material and establishes requirements for three Product Specification Levels (PSL-1. PSL-2. PSL-3). Grades: H40, J55, K55, M65, N80, L80, P110, Q125, L80-9CR, L80-13CR API 5CT Casing - pipe run from the surface and intended to line the walls of a drilled well. Casing Size: 4-1/2" ~ 20" Connections: Short Thread Coupled (STC) Long Thread Coupled (LTC) Buttress Thread Coupled (BTC) etc. Lengths: Range 1, Range 2 & Range 3 API 5CT Tubing - pipe placed in a well to produce or inject fluids. Tubing Size: 1.660”~ 4-1/2” Connections: NUE (non-upset tubing), EUE (external upset tubing) etc. Lengths: Range 1, Range 2 & Range 3 API 5CT Pup Joint: casing or tubing of length shorter than Range 1. API 5CT Coupling: internally threaded cylinder for joining two lengths of threaded pipe. API 5L covers seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries with two product specification levels (PSL 1 and PSL 2). Grade: B, X42, X52, X56, X65, X70 etc.