GB/T12770-2002 (Welded Steel Tubes for Mechanical Structures). Primarily used in machinery, automobiles, bicycles, furniture, hotel and restaurant decoration, and other mechanical components and structural parts. The representative materials include 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.

GB/T12771-1991 (Welded Stainless Steel Pipes for Fluid Transportation). Mainly used for transporting low-pressure corrosive mediums. Representative materials include 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc.

Decorative welded stainless steel pipes (GB/T 18705-2002), stainless steel straight seam welded pipes for building decoration (JG/T 3030-1995), large diameter electric welded steel pipes for low-pressure fluid transmission (GB/T 3091-2001), and straight seam welded pipes for heat exchangers (YB4103-2000).