Knowledge of seamless stainless steel pipes

First, knowledge of seamless stainless steel pipes - the concept of stainless steel pipes
It is a hollow long steel strip, which is widely used as a pipeline for conveying fluids, such as oil, natural gas, water, coal gas, steam, etc. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used to produce various conventional weapons, gun barrels, shells, etc.

Second, knowledge of seamless stainless steel pipes - the application of stainless steel pipes
Stainless steel pipes are safe, reliable, hygienic, environmentally friendly, economical, and applicable. The thin-walled pipes and the successful development of new reliable, simple, and convenient connection methods have given them more advantages that other pipes cannot replace. There will be more and more applications in engineering, and the use will become more and more popular, and the prospects are promising.

With the implementation of my country's reform and opening-up policy, the national economy has achieved rapid growth, and a large number of urban residential buildings, public buildings, and tourist facilities have been built, which has put forward new requirements for hot water supply and domestic water supply. In particular, people pay more and more attention to water quality issues, and the requirements are constantly improving. Galvanized steel pipes, a common pipe material, will gradually withdraw from the historical stage due to their easy corrosion under the influence of relevant national policies. Plastic pipes, composite pipes, and copper pipes have become common pipes for pipeline systems. However, in many cases, stainless steel pipes are more advantageous, especially thin-walled stainless steel pipes with a wall thickness of only 0.6 to 1.2 mm, which are safe, reliable, hygienic, environmentally friendly, and economical in high-quality drinking water systems, hot water systems, and water supply systems that put safety and hygiene first. It has been proven by domestic and foreign engineering practices to be one of the new, energy-saving, and environmentally friendly pipes with comprehensive performance in water supply systems. It is also a very competitive water supply pipe material, which will surely play an incomparable role in improving water quality and improving people's living standards.

In the building water supply system, since the galvanized steel pipe has ended its glorious history of a hundred years, various new plastic pipes and composite pipes have developed rapidly, but various pipes still have some shortcomings to varying degrees and are far from fully meeting the needs of the water supply system and the country's requirements for drinking water and related water quality. Therefore, relevant experts predict that building water supply pipes will eventually return to the era of metal pipes. According to foreign application experience, thin-walled stainless steel pipes are recognized as one of the pipes with comprehensive performance among metal pipes.

Third, knowledge of stainless steel seamless steel pipes - stainless steel pipe materials
Material:
201(1Cr17Mn6Ni5N)
202(1Cr18Mn8Ni5N)
301(1Cr17Ni7) 302(1Cr18Ni)
304(0Cr18Ni9), SS304, TP304 304L(00Cr19Ni10), SS304L, TP304L 321(1Cr18Ni9Ti), SS321, TP321 316(0Cr17Ni12Mo2), SS316, TP316 316L(0Cr17Ni14Mo2), SS316L, TP316L 310S(0Cr25N20), SS310S, TP310S Stainless steel pipe implementation standard
GB2270-80 Stainless steel seamless steel pipe
GB/T14976-94 Stainless steel seamless steel pipe for fluid transportation GB/T14975-94 Stainless steel seamless steel pipe for structure
GB13296-91 Stainless steel seamless steel pipe for boiler and heat exchanger (GJB2608-96)(YB676-73) Structural steel thick wall seamless steel pipe for aviation (GJB2296-95)(YB678-71) Stainless steel seamless steel pipe for aviation
(YB/T679-97)(YB679-71) 18A hollow rivet thin wall seamless steel pipe for aviation (GJB2609-96)(YB680-71) Structural thin wall seamless steel pipe for aviation (YB/T681-97)(YB681-71) 20A thin wall seamless steel pipe for aviation GB3090-82 Stainless steel small diameter steel pipe GB5310-95 Seamless steel pipe for high-pressure boiler GB3087-82 Low and medium pressure seamless steel pipe GB3089-92 Stainless acid-resistant ultra-thin-wall seamless steel pipe GB9948-88 Petroleum cracking seamless steel pipe
ASTM A213 Ferritic and austenitic alloy steel seamless steel pipes for boilers and heat exchangers ASTM A269 Austenitic stainless steel seamless steel pipes and welded steel pipes for general use ASTM A312 Austenitic stainless steel seamless steel pipes and welded steel pipes ASTM A450 General requirements for carbon steel, ferritic and austenitic alloy steel pipes ASTM A530 General requirements for ferritic and alloy steels for special purposes
ASTM A789 General requirements for carbonic austenitic stainless steel seamless steel pipes and welded steel pipes JIS G3456-88 Stainless steel pipes for mechanical structures JIS G3448-88 Stainless steel pipes for ordinary pipelines
JIS G3459-88 Stainless steel pipes for pipelines
JIS G3463-88 Stainless steel pipes for boilers and heat exchangers Q/HYAD 101-91 Seamless long steel pipe for the chemical industry
(0Cr18NI11T) Q/HYAD 103-91 00Cr18Ni5MO3Si2 duplex stainless steel seamless steel pipe

Fourth, knowledge of stainless steel seamless steel pipe - classification of stainless steel pipe
1. Classification by production method
(1) Seamless pipe - cold drawn pipe, extruded pipe, cold rolled pipe Stainless steel seamless steel pipe is a long steel strip with a hollow cross-section and no seams around it.
(2) Manufacturing process and flow of seamless steel pipe:
Smelting>Ingot>Rolling>Sawing>Peeling>Piercing>Annealing>Pickling>Cementing>Cold Drawing>Cut Head>Pickling>Storage
(3) Characteristics of seamless steel pipe:
First, the thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the higher the processing cost.
Second, the process of the product determines its limitations. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness of the inner and outer surfaces of the pipe, high cost of fixed length, and pitting and black spots on the inner and outer surfaces are not easy to remove.
Third, its detection and shaping must be processed offline. Therefore, it has demonstrated its superiority in high pressure, high strength, and mechanical structure materials.