... , water pressure test, crystal rot test, heat treatment, NDT Chemical Composition of Material Material Composition201202304316430C≤ 0.15≤ 0.15≤ 0.08≤ 0 ... usually.Baodelong Steel Pipe Manufacturing Co., Ltd is a supplier of new and used steel pipe and tubing. We sell carbon ... and spiralweld pipe. We supply structural, reconditioned and various grades of used pipe and pile as well. If you are interested ...