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Standard
1. Seamless pipe for structure (GB/T8162-2008) is a seamless pipe used for general structure and mechanical structure.
2. Seamless pipe for fluid transportation (GB/T8163-2008) is a general seamless pipe used to transport water, oil, gas and other fluids.
3. Seamless pipe for low and medium pressure boilers (GB3087-2008) is a high-quality carbon structural steel hot-rolled and cold-drawn (rolled) seamless pipe for the manufacture of superheated steam pipes, boiling water pipes and superheated steam pipes, large smoke pipes, small smoke pipes and arch brick pipes for locomotive boilers of various structures.
4. Seamless pipe for high-pressure boiler (GB5310-2008) is a high-quality carbon steel, alloy steel and stainless steel-resistant steel seamless pipe for the heating surface of water pipe boilers with high pressure and above pressure.
5. High-pressure seamless pipe for fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel seamless pipe suitable for chemical equipment and pipelines with a working temperature of -40~400°C and a working pressure of 10~30Ma.
6. Seamless pipe for petroleum cracking (GB9948-2006) is a seamless pipe for furnace tubes, heat exchangers and pipelines suitable for petroleum refineries.
7. Steel pipe for geological drilling (YB235-70) is a steel pipe used by geological departments for core drilling, which can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe according to the purpose.
8. Seamless pipe for diamond core drilling (GB3423-82) is a seamless pipe for drill pipe, core rod and casing used for diamond core drilling.
9. Oil drilling pipe (YB528-65) is a seamless pipe used for thickening inside or outside at both ends of oil drilling.
10. Carbon steel seamless pipe for ships (GB5312-85) China Classification Society Materials and Welding Specification - China Classification Society (CCS) Norwegian Bureau of Shipping (DNV) Specification - Norwegian Bureau of Shipping (DNV) British Lloyd's Register of Shipping (LR) Code - Lloyd's Register of Shipping (LR) German Lloyds Register of Shipping (GL) Specification - Lloyd's Register of Shipping (GL) American Bureau of Shipping (ABS) Specification - American Bureau of Shipping (ABS) Specification - French Classification Society (BV) Italian Classification Society (RINA) Code - Italian Classification Society (RINA) Japanese Classification Society (NK) Specification - Japan Classification Society (NK) is a carbon steel seamless pipe for the manufacture of ship Class I pressure pipe system, Class II pressure pressure pipe system, boiler and superheater. The working temperature of carbon steel seamless pipe wall does not exceed 450°C, and the working temperature of alloy steel seamless pipe wall exceeds 450°C.
11. Seamless pipe for automobile half shaft casing (GB3088-82) is a high-quality carbon structural steel and alloy structural steel hot-rolled seamless pipe for manufacturing automobile half shaft bushing and drive axle axle shell shaft pipe.
12. High-pressure oil pipe for diesel engine (GB3093-86) is a cold-drawn seamless pipe for manufacturing high-pressure pipe for diesel engine injection system.
13. Precision inner diameter seamless pipe for hydraulic and pneumatic cylinder barrel (GB8713-88) is a cold-drawn or cold-rolled precision seamless pipe with precise inner diameter size for manufacturing hydraulic and pneumatic cylinder barrels.
14. Cold-drawn or cold-rolled precision seamless pipe (GB3639-83) is a cold-drawn or cold-rolled precision seamless pipe with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. Choose precision seamless pipes to manufacture mechanical structures or hydraulic equipment, etc.
15. Structural stainless steel seamless pipe (GB/T14975-2002) is a hot-rolled (extrusion, expansion) and cold-drawn (rolled) seamless pipe made of stainless steel for corrosion-resistant pipes and structural parts and parts widely used in chemical, petroleum, textile, medical, food, machinery and other industries.
16. Stainless steel seamless pipe for fluid conveying (GB/T14976-2002) is a hot-rolled (extrusion, expansion) and cold-drawn (rolled) seamless pipe made of stainless steel for transporting fluids.
17. Special-shaped seamless pipe is a general term for seamless pipes with other cross-sectional shapes except round pipes. According to the different shapes and sizes of steel pipes, they can be divided into equal wall thickness special-shaped seamless pipes (code name D), unequal wall thickness special-shaped seamless pipes (code name BD), and variable diameter special-shaped seamless pipes (code name BJ). Special-shaped seamless pipes are widely used in various structural parts, tools, and mechanical components.
18. Seamless steel pipe for low-temperature pipeline (GB/T18984-2003) is used for -45°C~-195°C cryogenic pressure vessel pipeline and seamless steel pipe for low-temperature heat exchanger pipeline, generally used seamless pipe is made of 10, 20, 30, 35, 45 and other high-quality carbon junction steel, 16Mn, 5MnV and other low-alloy structural steel, or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other combined steel hot rolled or cold rolled. Seamless pipes made of mild steel such as 10 and 20 are mainly used in fluid transmission pipelines. Seamless pipes made of medium carbon steel such as 45 and 40Cr are used to manufacture mechanical parts, such as stressed parts of automobiles and tractors. Generally, seamless pipes should be used to ensure strength and flattening tests. Hot-rolled steel pipes are delivered in hot-rolled or heat-treated state; Cold rolled and delivered in a hot and heat-treated state. Seamless pipes for low and medium pressure boilers: used to manufacture various low and medium pressure boilers, superheated steam pipes, boiling water pipes, water-cooled wall tubes, and superheated steam pipes, large smoke pipes, small smoke pipes, and arch brick pipes for locomotive boilers. Hot rolled or cold-rolled (dialed) seamless pipes with high-quality carbon structural steel.
It is mainly made of 10 and 20 gauge steel, and in addition to ensuring chemical composition and mechanical properties, it is necessary to do hydrostatic tests, crimping, flareing, flattening and other tests. Hot rolling is delivered in a hot-rolled state, and cold rolling (dialing) is delivered in a hot-treated state. Seamless management theory calculation formula: (outer diameter – wall thickness ) × wall thickness ×0.02466 = weight per meter of seamless pipe {kg}
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