... Pipe for High-Temperature ServiceASTM A179: Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser TubesASTM A192: ... X60, X65, X70, X80Size:Outer Diameter: Hot finish: 2" - 30", Cold drawn: 0.875" - 18"Wall Thickness: Hot finish: 0.250" - 4 ... .00", Cold drawn: 0.035" - 0.875"Length: Random Length, Fixed Length, SRL ...