Application of Welded Steel Pipe under Different Standards

　　GB/T3091-1993 (Galvanized Welded Steel Pipe for Low Pressure Fluid Conveyance). Mainly used for conveying water, gas, air, oil, heating hot water or steam and other general low pressure fluids and other purpose pipes. Its representative material is grade Q235A steel.

　　GB/T3092-1993 (Galvanized Welded Steel Pipe for Low Pressure Fluid Conveyance). ASTM A106 Sch40 Gr.B Carbon Welded steel pipe mainly used for conveying water, gas, air, oil, heating hot water or steam and other general low pressure fluids and other purpose pipes. Its representative material is Q235A grade steel.

　　GB/T 14291-1992 (Welded Pipe for Mine Fluid Transport). Mainly used for mine air pressure, drainage, shaft gas drainage with straight seam welded steel pipe. Its representative material is grade Q235A and B steel. GB/T 14980-1994 (Large Diameter Welded Steel Pipe for Low Pressure Fluid Conveyance). It is mainly used for conveying low pressure fluids such as water, sewage, gas, air, heating steam and other purposes. Its representative material is grade Q235A steel.

　　GB/T12770-1991 (stainless steel welded steel pipe for mechanical structure). Mainly used for machinery, automobiles, bicycles, furniture, Hotel and hotel decoration and other mechanical parts and structural parts. Its representative materials are 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.

　　GB/T12771-1991 (Welded stainless steel pipe for fluid conveying). Mainly used for conveying low-pressure corrosive media. The representative materials are 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc.