... , metallurgy, food, water conservancy,electric power, chemical industry,Chemical, chemical fiber, pharmaceutical machinery, etcASTM A213ASTM A312304304L316316L321steel ... pipelineASTM A333A333 GR6steel pipe forhigh-pressure boilerUsed in manufacturing by high pressure boiler tube,the ... , mechanicalASTM A53A53 Bpipeline steel pipeUsed in oil and natural gas industry in order to transmit the he oxygen ...