... , boilogy, electron, chemical, petroleum, fertilizer, boiler, nuclear energy, and etc. 9) Packing: In seaworthy wooden cases or in bundles ... 400#,600#), Hairline,aid pickling and so onProduction technologySeamless steel pipeWelded steel pipeSurface treatmentPolishing or notThe stainless steel barstandardASTM,GBmaterial201,202,301,304 ... feel free to contact me any time. 310 stainless steel pipe/tube