1. GB/T8162-2018, Seamless steel pipes for structural use, mainly used in general structural engineering, mechanical processing, construction, and other fields. Representative materials: 20#, 45#, q345b, 40Cr, 42CrMo, etc.;
2. GB/T8163-2018, seamless steel pipe for fluid transportation, mainly used in pipeline projects with low pressure. Representative material: 20#, q345b;
3. GB/T3087-2017, low and medium-pressure boiler seamless steel pipes, mainly used to manufacture superheated steam pipes, boiling water pipes for low and medium-pressure boilers of various structures, and superheated steam pipes and arch brick pipes for locomotive boilers. Representative materials: 10#, 20#, Q355B;
4. GB/T5310-2017, Seamless steel pipes for high-pressure boilers, mainly used to manufacture the heating surfaces of water-tube boilers for high pressures and above. There are carbon steel, alloy steel, and stainless heat-resistant steel seamless steel pipes. Representative materials: 20G, 15CrMoG, 12Cr1MoVG, etc.;
5. GB/T6479-2018, high-pressure seamless steel pipes for fertilizer equipment, mainly used for chemical equipment and pipelines with working temperatures of -40~400℃ and working pressures of 10~30Ma. There are carbon structural steel and alloy steel seamless steel pipes. Representative materials: q345a-b-c-d-e, 20#, 10mowvnb, 15CrMo;
6. GB/T9948-2013, seamless steel pipes for petroleum cracking, mainly used for furnace tubes, heat exchangers, and pipelines in petroleum refineries. Representative materials: 10#, 20#, Q345, 15CrMo;
7. YB235-70, a steel pipe for geological drilling, is a steel pipe used by the geological department for core drilling. According to its use, it can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe, etc. Representative materials: DZ40, DZ50, R780, etc.;
8.GB3423-82, seamless steel pipe for diamond core drilling, mainly used for drill pipe, core rod, and casing for diamond core drilling. Representative materials:
9.YB528-65, an oil drilling pipe, is a seamless steel pipe with internal or external thickening at both ends for oil drilling. There are two types of steel pipes: wired and unthreaded. Threaded pipes are connected with joints, while non-threaded pipes are connected with tool joints by butt welding.
10.GB5213-85, a carbon steel seamless steel pipe for ships, is a carbon steel seamless steel pipe used in manufacturing ships’ Class I pressure-resistant piping systems, Class II pressure-resistant piping systems, boilers, and superheaters. The working temperature of the carbon steel seamless steel pipe wall does not exceed 450°C, and the working temperature of the alloy steel seamless steel pipe wall exceeds 450°C.
11.GB3088-82, seamless steel pipe for automobile half-shaft casing, is a high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipe used for manufacturing automobile half-shaft casings and drive axle housing shaft tubes.
12.GB3093-2002, a high-pressure oil pipe for diesel engines, is a cold-drawn seamless steel pipe used to manufacture high-pressure pipes for diesel engine injection systems.
13.GB8713-88, precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinders, is a cold-drawn or cold-rolled precision seamless steel pipe with a precise inner diameter for manufacturing hydraulic and pneumatic cylinders.
14.GB3639-2000, cold drawn or cold rolled precision seamless steel pipe, is a cold drawn or cold rolled precision seamless steel pipe with high dimensional accuracy and good surface finish used in mechanical structures and hydraulic equipment. The use of precision seamless steel pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and at the same time, help improve product quality.
15. GB/T14975-2002, Stainless steel seamless steel pipes for structural use are hot-rolled (extruded) stainless steel made of corrosion-resistant pipes and structural parts and parts that are widely used in chemical, petroleum, textile, medical, food, machinery, and other industries. , expanded) and cold-drawn (rolled) seamless steel pipes. Representative materials: 201, 304, 316, etc.;
16. GB/T14976-2002, stainless steel seamless steel pipes for fluid transportation, are hot-rolled (extruded, expanded) and cold-drawn (rolled) seamless steel pipes made of stainless steel used to transport fluids. Representative materials: 20#, 35#, 45#, Q355B, 35CrMo, 20CrMnTi, etc.; Representative materials: 201, 304, 316L, tp304, etc.;
17. Special-shaped seamless steel pipe is a general term for seamless steel pipes with other cross-sectional shapes except round pipes. According to the different cross-sectional shapes and sizes of steel pipes, they can be divided into special-shaped seamless steel pipes with equal wall thickness (code-named D), special-shaped seamless steel pipes with unequal wall thickness (code-named BD), and variable-diameter special-shaped seamless steel pipes (code-named BJ). Special-shaped seamless steel pipes are widely used in various structural parts, tools, and mechanical parts. Compared with round pipes, special-shaped pipes generally have a larger moment of inertia and section modulus, and have greater bending and torsion resistance, which can greatly reduce the weight of the structure and save steel. Representative materials: Q235B, 20#, 45#, etc.;
18. GB/T18984-2003, seamless steel pipes for low-temperature pipelines, suitable for -45℃ to -195℃ low-temperature pressure vessel pipes and seamless steel pipes for low-temperature heat exchanger pipes. Representative materials: 16MnDG, Q355D, Q4355E, etc.;