Executive standard for seamless steel pipe

【1】 Structural seamless pipe (GB / t8162-2008) is a kind of seamless steel pipe used in general structure and mechanical structure.

【2】 Seamless steel pipe for fluid transportation (GB / T 8163-2018) is a general seamless steel pipe used to transport water, oil, gas and other fluids[ 1]

【3】 Seamless steel pipe for low and medium pressure boiler (gb3087-2008) is a kind of high quality carbon structural steel hot rolled and cold drawn seamless steel pipe used for manufacturing superheated steam pipe, boiling water pipe for low and medium pressure boiler of various structures, superheated steam pipe and arch brick pipe for locomotive boiler.

【4】 Seamless steel pipe for high pressure boiler (GB5310-2008) is a kind of high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless steel pipe used for heating surface of water tube boiler with high pressure and above.

【5】 High pressure seamless steel pipe for chemical fertilizer equipment (GB6479-2000) is a kind of high-quality carbon structural steel and alloy steel seamless steel pipe suitable for chemical equipment and pipeline with working temperature of - 40 ~ 400 ℃ and working pressure of 10 ~ 30mA.

【6】 Seamless steel tube for petroleum cracking (GB9948-2006) is a kind of seamless steel tube for furnace tube, heat exchanger and pipeline in petroleum refinery.

【7】 The steel pipe for geological drilling (yb235-70) is a kind of steel pipe used by geological department for core drilling. It can be divided into drill pipe, drill collar, core pipe, casing and settling pipe according to its application.

【8】 Seamless steel pipe for diamond core drilling (gb3423-82) is a seamless steel pipe for drill pipe, core rod and casing used for diamond core drilling.

【9】 Oil drilling pipe (yb528-65) is a kind of seamless steel pipe which is used for inner thickening or outer thickening at both ends of oil drilling. There are two kinds of steel pipes: turning and non turning. The turning pipe is connected with joint, and the non turning pipe is connected with tool joint by butt welding.

【10】 Carbon steel seamless steel pipe for ships (gb5213-85) is a kind of carbon steel seamless steel pipe for manufacturing class I pressure pipe system, class II pressure pipe system, boiler and superheater. The working temperature of carbon steel seamless pipe wall is not more than 450 ℃, and that of alloy steel seamless pipe wall is more than 450 ℃.

【11】 Seamless steel pipe for automobile axle sleeve (gb3088-82) is a kind of high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe for automobile axle sleeve and axle housing.

【12】 High pressure oil pipe for diesel engine (gb3093-2002) is a kind of cold drawn seamless steel pipe used to manufacture high pressure pipe for injection system of diesel engine.

【13】 Precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinder (GB8713-88) is a kind of cold drawn or cold rolled precision seamless steel pipe with precision inner diameter for hydraulic and pneumatic cylinder.

【14】 Cold drawn or cold-rolled precision seamless steel pipe (GB3639-2000) is a kind of cold drawn or cold-rolled precision seamless steel pipe with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. Selecting precision seamless steel tube to manufacture mechanical structure or hydraulic equipment can greatly save machining time, improve material utilization rate and improve product quality.

【15】 Structural stainless steel seamless pipe (GB / T14975-2002) is a kind of hot rolled (extrusion, expansion) and cold drawn (rolling) seamless pipe made of stainless steel, which is widely used in chemical industry, petroleum, textile, medical, food, machinery and other industries.

【16】 Stainless steel seamless pipe for fluid transportation (GB / T14976-2002) is a kind of hot rolled (extrusion, expansion) and cold drawn (rolling) seamless pipe made of stainless steel for fluid transportation.

【17】 Profiled seamless steel pipe is the general name of seamless steel pipe with other cross-section shapes except round pipe. According to the different cross-section shape and size of steel pipe, it can be divided into equal wall thickness special-shaped seamless steel pipe (code name d), unequal wall thickness special-shaped seamless steel pipe (code name BD) and variable diameter special-shaped seamless steel pipe (code name BJ). Profiled seamless steel pipe is widely used in various structural parts, tools and mechanical parts. Compared with round pipe, special-shaped pipe generally has larger moment of inertia and section modulus, larger bending and torsion resistance, which can greatly reduce the structural weight and save steel.

【18】 The seamless steel pipe for low temperature pipeline (GB / t18984-2003) is suitable for - 45 ℃ ～ - 195 ℃ low temperature pressure vessel pipeline and low temperature heat exchanger pipeline.