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 Stainless Steel Pipes for Fluid Transportation). Primarily used for transporting low-pressure corrosive media. Typical materials include 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, and 0017Cr17Ni14Mo2.

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