Uses of seamless pipes made from various materials
2025-09-13
GB/T8162-1999 (Seamless Square Tubes for Structural Purposes). Primarily used in general structural and mechanical applications. Representative materials (grades): Carbon steel 20, 45; alloy steels Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, and others.
GB/T8163-1999 (Seamless Square Tubes for Fluid Transport). Primarily used in engineering and large-scale equipment for transporting fluid pipelines. Representative materials (grades) include 20, Q345, and others.
GB3087-1999 (Seamless Square Tubes for Low- and Medium-Pressure Boilers). Primarily used as pipelines for transporting low- and medium-pressure fluids in industrial and domestic boilers. The representative materials are steel grades 10 and 20.
GB5310-1995 (Seamless Square Tubes for High-Pressure Boilers). Primarily used in power plants and nuclear power plant boilers for high-temperature, high-pressure fluid distribution headers and pipelines. Typical materials include 20G, 12Cr1MoVG, 15CrMoG, and others.
GB5312-1999 (Seamless Square Tubes Made of Carbon Steel and Carbon-Manganese Steel for Marine Applications). Primarily used for Class I and Class II pressure-resistant tubes in marine boilers and superheaters. Representative material grades include 360, 410, and 460 steels, among others.
GB1479-2000 (Seamless Square Tubes for High-Pressure Fertilizer Equipment). Primarily used in fertilizer equipment for transporting high-temperature, high-pressure fluid pipelines. Typical materials include 20, 16Mn, 12CrMo, 12Cr2Mo, and others.
GB9948-1988 (Seamless Square Tubes for Petroleum Cracking). Primarily used in boilers, heat exchangers, and fluid-conveying pipelines at petroleum refineries. Representative materials include 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, and others.
GB18248-2000 (Seamless Square Tubes for Gas Cylinders) is primarily used in the manufacturing of various gas and hydraulic cylinders. Its representative materials include 37Mn, 34Mn2V, 35CrMo, and others.
GB/T17396-1998 (Hot-Rolled Seamless Square Tubes for Hydraulic Supports). Primarily used in the manufacturing of hydraulic supports and cylinders/pillars for coal mines, as well as other hydraulic cylinders and pillars. Commonly available materials include 20, 45, and 27SiMn, among others.
GB3093-1986 (High-pressure Seamless Square Tubes for Diesel Engines). Primarily used as high-pressure fuel lines in diesel engine injection systems. These square tubes are typically cold-drawn, with 20A being the representative material.
GB/T3639-1983 (Cold-Drawn or Cold-Rolled Precision Seamless Square Tubes). Primarily used for mechanical structures and carbon compression equipment, these square tubes demand high dimensional accuracy and excellent surface finish. Representative materials include 20 and 45 steel, among others.
GB/T3094-1986 (Cold-Drawn Seamless Square and Special-Shaped Steel Tubes). Primarily used for manufacturing various structural components and parts, these tubes are made from high-quality carbon structural steel and low-alloy structural steel.
GB/T8713-1988 (Precision Seamless Square Tubes for Hydraulic and Pneumatic Cylinders). Primarily used to manufacture cold-drawn or cold-rolled seamless square tubes with precise inner diameters, intended for hydraulic and pneumatic cylinder barrels. Representative materials include 20 and 45 steel, among others.
GB13296-1991 (Stainless Steel Seamless Square Tubes for Boilers and Heat Exchangers). Primarily used in boilers, superheaters, heat exchangers, condensers, catalytic tubes, and other equipment in chemical enterprises. These square tubes are designed to withstand high temperatures, high pressures, and corrosive environments. Representative materials include 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, and others.
GB/T14975-1994 (Seamless Stainless Steel Square Tubes for Structural Applications). Primarily used for general structural purposes (such as decoration in hotels and restaurants) and mechanical structures in chemical industry enterprises—tubes designed to withstand atmospheric and acid corrosion while maintaining adequate strength. Representative materials include 03Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, and others.
GB/T14976-1994 (Seamless Stainless Steel Square Tubes for Fluid Transport). Primarily used as pipelines for conveying corrosive media. Typical materials include 0Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr17Ni12Mo2, 0Cr18Ni12Mo2Ti, and others.
YB/T5035-1993 (Seamless Square Tubes for Automotive Half-Shaft Sleeves). Primarily used for manufacturing high-quality carbon structural steel and alloy structural steel hot-rolled seamless square tubes intended for automotive half-shaft sleeves and axle tubes of drive-bridge housings. Representative materials include 45, 45Mn2, 40Cr, 20CrNi3A, and others.