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

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

Additionally, decorative焊接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 conveyance (GB/T 3091-2001), and straight seam welded pipes for heat exchangers (YB4103-2000).