... , 15CrMoG, 12Cr1MoVGLow & medium & high pressure boiler header, steam pipe, heating pipeStructure PipeASTM A53/A106, GB8162A, B, 20#, 45#, ... Q345, 20Mn2, 42CrMoUsed for producing mechanical parts and pipe fittingsHydraulic TubeGB1739635#, 45#, 27SiMn, 20CrMo4, 30CrMo4Mining machineryOil Cracking ... until the steel is shaped into a hollow tube. The seamless pipe is then finished to dimensional and ...