GB/T8162-2018, structural seamless steel pipes, mainly used in general structural engineering, machining, construction and other fields. Representative materials: 20#, 45#, q345b, 40Cr, 42CrMo, etc.;

GB/T8163-2018, seamless steel pipe for fluid transportation, mainly used for pipeline engineering with low pressure. Representative material: 20#, q345b;

45# GB8162 structural seamless steel pipe

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, superheated steam pipes and arch brick pipes for locomotive boilers. Representative material: 10#, 20#, Q355B;

GB5310 high pressure boiler tube, material 12Cr1MovG

GB/T5310-2017, seamless steel pipes for high pressure boilers, mainly used for the heating surface of water tube boilers with high pressure and above. There are carbon steel, alloy steel and stainless steel heat-resistant seamless steel pipes. Representative materials: 20G, 15CrMoG, 12Cr1MoVG, etc.;

GB/T6479-2018, high-pressure seamless steel pipes for chemical fertilizer equipment, mainly used for chemical equipment and pipelines with a working temperature of -40~400°C and a working pressure of 10~30Ma. There are carbon structural steel and alloy steel seamless steel pipes. Representative material: q345a-b-c-d-e, 20#, 10mowvnb, 15CrMo;

GB/T9948-2013, seamless steel pipes for petroleum cracking, mainly used for furnace tubes, heat exchangers and pipelines in petroleum refineries. Representative material: 10#, 20#, Q345, 15CrMo;

YB235-70, steel pipe for geological drilling, is a steel pipe for core drilling in geological departments, and can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe according to the purpose. Representative materials: DZ40, DZ50, R780, etc.;

GB3423-82, seamless steel pipe for diamond core drilling, mainly used for drill pipe, core rod and casing for diamond core drilling. Representative material:

YB528-65, oil drilling pipe, is a seamless steel pipe that is thickened internally or externally at both ends of oil drilling. There are two types of steel pipes: threaded and non-threaded. The threaded pipes are connected with joints, and the non-threaded pipes are connected with tool joints by butt welding.

GB5213-85, carbon steel seamless steel pipe for ships, is a carbon steel seamless steel pipe for the manufacture of 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.

GB3088-82, seamless steel pipe for automobile half shaft casing, is a hot-rolled seamless steel pipe of high-quality carbon structural steel and alloy structural steel for the manufacture of automobile half shaft casing and drive axle casing shaft tube.

GB3093-2002, high-pressure oil pipes for diesel engines, are cold-drawn seamless steel pipes for the manufacture of high-pressure pipes for diesel engine injection systems.

GB8713-88, precision inner diameter seamless steel tubes for hydraulic and pneumatic cylinders, cold-drawn or cold-rolled precision seamless steel tubes with precise inner diameters for the manufacture of hydraulic and pneumatic cylinders.

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 for 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 help improve product quality.