Seamless splicing stainless steel pipe is a kind of stainless steel plate with hollow cross section without joints around it. It is used for seamless steel pipe of general structure and mechanical system.
The inner and outer surface of the pipe shall be free of cracks, expansion, cracking, cracks, rolling folds, delamination and scab. This defect shall be completely eliminated (except for the pipe for machining and manufacturing). After elimination, the wall thickness and diameter shall not exceed the negative error. Other minor surface defects that do not exceed the allowable negative error will not be eliminated. According to national standards, it can be divided into:
1: Seamless steel pipe for ultra-low temperature pipeline is applicable to seamless steel pipe for ultra-low temperature and high pressure vessel pipeline at - 55 ℃ ~ - 200 ℃ and ultra-low temperature heat exchanger pipeline. The most concise and clear indication of pipeline diameter and thickness is: specific diameter of pipeline * specific wall thickness;
2: Oil drilling pipe (yb527-75) is a seamless steel pipe with inner thickening or outer thickening on both sides of oil drilling. Seamless steel pipe is divided into turning wire and non turning wire. Turning wire is connected with connector, and non turning wire is connected with special tool connector by butt welding.
3: Carbon steel seamless steel pipe for ships (gb5212-80) is an alloy steel seamless steel pipe for producing and manufacturing class I compression pipeline, class II compression pipeline, heating furnace and heating surface of ships. The wall thickness operating temperature of alloy steel seamless steel pipe shall not exceed 450 ℃, and the wall thickness operating temperature of carbon steel seamless steel pipe shall exceed 450 ℃;
4: Seamless steel pipe (gb3084-82) for automobile axle shaft waterproof sleeve is a high-quality carbon steel and alloy tool steel hot-rolled seamless steel pipe useful for the production and manufacture of automobile axle shaft waterproof sleeve and driver axle housing shaft;
5: Hydraulic oil pipe for diesel engine (gb3093-2001) is a cold drawn seamless steel pipe useful for producing high pressure of diesel engine surge system software;
6: High precision inner diameter seamless steel pipe (GB8713-88) for hydraulic press and pneumatic cylinder sleeve is a cold drawn or cold drawn high precision seamless steel pipe with high precision inner diameter specification for hydraulic press and pneumatic cylinder sleeve;
7: Cold drawn or cold drawn high-precision seamless steel pipe (gb3639-2012) is a cold drawn or cold drawn high-precision seamless steel pipe with high specification precision and good surface smoothness for mechanical system and hydraulic machinery. The use of high-precision seamless steel pipe production and manufacturing mechanical system or hydraulic machinery can greatly save the comprehensive working hours of machining and manufacturing, improve the utilization rate of raw materials, and improve the product quality;
8: Stainless steel plate seamless steel pipe for construction (GB / t14975-2012) is a hot rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipe made of stainless steel plate of corrosion-resistant pipelines, parts and components commonly used in chemical plants, petroleum, textile industry, diagnosis and treatment, food, mechanical equipment and other industrial production;
9: Stainless steel sheet seamless steel pipe for fluid mechanics transportation (GB / t14975-2004) is a hot rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipe made of stainless steel sheet for fluid mechanics transportation;
10: Seamless steel pipe for fluid mechanics transportation (GB / t8163-2009) is a general seamless steel pipe used to transport fluid mechanics such as water, oil and gas;
11: Seamless steel pipe for low and high pressure heating furnace (gb3087-2009) is a high-quality carbon steel hot-rolled and cold drawn (rolled) seamless steel pipe useful for producing various saturated steam pipes and open pipes for low and high pressure heating furnace and saturated steam pipes and arch bricks for electric locomotive heating furnace;
12: Seamless steel pipe for high-pressure boiler (gb5310-2009) is a high-quality alloy steel, carbon steel and stainless steel heat-resistant steel seamless steel pipe used for producing hot surface of water pipe heating furnace with high pressure and above working pressure;
13: High pressure seamless steel pipe (gb6479-2002) for organic fertilizer machinery and equipment is a high-quality carbon steel and carbon steel seamless steel pipe suitable for chemical machinery equipment and pipelines with operating temperature of - 40 ~ 400 ℃ and pressure of 10 ~ 30mA;
14: Seamless steel pipe for petroleum cracking (gb9948-2004) is a seamless steel pipe for furnace body, heat exchanger and pipeline in petroleum refinery;
15: Seamless steel pipe for geological drilling (yb235-70) is a seamless steel pipe for geological units to carry out core drilling. It can be divided into drilling tool, drill collar, core pipe, waterproof casing and setting pipe according to its main uses;
16: Seamless steel pipe for diamond core drilling (gb3423-84) is a seamless steel pipe for drilling tools, core rods and waterproof casings used for diamond core drilling;
17: Special shaped seamless steel pipe is a general term for seamless steel pipes with other cross-section appearance except open round steel pipe. According to the different cross-section appearance and specifications of seamless steel pipe, it can be divided into equal wall thickness special-shaped seamless steel pipe (No. d), different wall thickness special-shaped seamless steel pipe (No. BD) and variable diameter special-shaped seamless steel pipe (No. BJ). Special shaped seamless steel pipe is widely used in a variety of parts, special tools and mechanical parts. Compared with round steel pipe, special-shaped steel generally has great moment of inertia and cross-section displacement coefficient, great bending strength and torsional working capacity, which can greatly alleviate the net weight of structure and save stainless steel plate;
Of course, with the rapid development trend of China's economic development, there will be more and more material types of seamless stainless steel pipes, which will be convenient for the people's daily life!
