Knowledge of stainless steel seamless steel pipe? Concept of stainless steel pipe
It is a kind of hollow strip steel, which is widely used as a pipeline for conveying fluids, such as oil, natural gas, water, gas and steam. In addition, under the same bending and torsion strength, it is light in weight, so it is also widely used to manufacture mechanical parts and engineering structures. It is also often used to produce various conventional weapons, barrels, shells and so on.
Knowledge of stainless steel seamless steel pipe? Application of stainless steel pipe
Stainless steel pipes are safe, reliable, hygienic, environmentally friendly, economical and applicable. With the successful development of thin-walled pipes and new reliable and simple connection methods, thin-walled pipes have irreplaceable advantages over other pipelines, and will be used more and more in engineering, with broad prospects.
With the implementation of China's reform and opening-up policy, the national economy has achieved rapid growth, and the construction of a large number of urban houses, public buildings and tourist facilities has put forward new requirements for hot water supply and domestic water supply. Especially the water quality problem, people pay more and more attention to it, and the requirements are constantly improving. Galvanized steel pipe, a common pipe, will gradually withdraw from the historical stage under the influence of relevant national policies because of its corrosiveness. Plastic pipe, composite pipe and copper pipe have become common pipes in pipeline system. However, in many cases, stainless steel pipes are superior, especially thin-walled stainless steel pipes with a wall thickness of only 0.6 ~ 1.2 mm, which are safe, reliable, hygienic, environmentally friendly and economical, and are suitable for high-quality drinking water systems, hot water systems and water supply systems that put safety and hygiene first. Engineering practice at home and abroad has proved that it is one of the new energy-saving and environmental protection pipes with the best comprehensive performance in water supply system, and it is also a highly competitive water supply pipe, which will surely play an unparalleled role in improving water quality and people's living standards.
In the building water supply system, due to the glorious history of galvanized steel pipes, various new plastic pipes and composite pipes have developed rapidly, but there are still some deficiencies in various pipes, which are far from fully meeting the needs of the water supply system and the national requirements for drinking water and related water quality. Therefore, experts predict that the building water supply pipeline will eventually return to the metal pipe era. According to the application experience abroad, thin-walled stainless steel pipe is considered to be one of the metal pipes with the best comprehensive performance.
Knowledge of stainless steel seamless steel pipe? Stainless steel tubing
Materials:
20 1( 1cr 17 Mn 6 ni 5n)
202( 1Cr 18Mn8Ni5N)
30 1( 1cr 17ni 7)302( 1cr 18Ni)
304(0Cr 18Ni9)、SS304、TP 304 304 l(00cr 19 ni 10)、SS304L、TP 304 l 32 1( 1cr 18 ni 9 ti)、SS32 1、Tp32 1 365438
GB2270-80 Stainless Steel Seamless Steel Tube
Seamless Stainless Steel Pipe for Fluid Transportation GB/T 14976-94 Seamless Stainless Steel Pipe for Structure
GB 13296-9 1 stainless steel seamless pipe for boilers and heat exchangers (GJB2608-96)(YB676-73) structural steel thick-walled seamless pipe for aviation (GJB2296-95)(YB678-7 1) stainless steel seamless pipe for aviation.
(YB/T679-97)(YB679-7 1) Thin-walled seamless steel pipe with hollow rivet for aviation (GJB2609-96)(YB680-7 1) Thin-walled seamless steel pipe with aviation structure (Yb/T68 1-97) Aviation.
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Mechanical structures generally require carbon austenitic stainless steel seamless pipes and welded steel pipes, mechanical structures generally require JIS G3456-88 stainless steel pipes, and general pipelines require JIS G3448-88 stainless steel pipes.
JIS G3459-88 Stainless Steel Pipe for Pipeline
JIS G3463-88 stainless steel tubes for boilers and heat exchangers q/hyd101-91seamless long steel tubes for chemical industry.
(0cr18ni11t) q/hyd103-9100cr18ni5mo3si2 duplex stainless steel seamless steel pipe.
Knowledge of stainless steel seamless steel pipe? Classification of stainless steel pipes
1, classified by production mode
(1) Seamless pipe? Cold-drawn pipe, extruded pipe and cold-rolled pipe stainless steel seamless pipe is a kind of long steel with hollow cross section and no seam around it.
Production technology and process of seamless steel pipe
Smelting > ingot > steel rolling > sawing > peeling > perforation > annealing > pickling > ash removal > cold drawing > cutting head > pickling > warehousing.
Characteristics of seamless steel pipe
It is not difficult to see from the above technological process: firstly, the thicker the wall thickness of the product, the more economical and practical it will be, and the thinner the wall thickness, the higher its processing cost will be; Secondly, the technology of this product determines its limitations. Generally, the precision of seamless steel pipe is low: the wall thickness is uneven, the brightness of the inner and outer surfaces of the pipe is low, the cut-to-length cost is high, and the pits and black spots on the inner and outer surfaces are difficult to remove; Third, its detection and shaping must be done off-line. Therefore, it shows its advantages in high pressure, high strength and mechanical structure materials.
(2) welding pipes
(a) according to the process? Gas shielded welded pipe, arc welded pipe, resistance welded pipe (high frequency, low frequency) (b) according to the weld? Straight welded pipe, spiral welded pipe
Stainless steel welded steel pipe
Welded steel pipe, referred to as welded pipe for short, is a steel pipe made of steel plate or steel strip after crimping, unit and die forming.
Manufacturing technology and process of welded steel pipe
Steel plate > stripping > forming > fusion welding > induction bright heat treatment >: internal and external weld treatment > shaping > sizing > eddy current testing > laser diameter measurement > pickling > warehousing.
Characteristics of welded steel pipe
From the above technological process, we can easily see that: firstly, the product is continuously produced online, and the greater the wall thickness, the greater the investment of the unit and welding equipment, and the less economical and practical it is. The thinner the wall thickness, the lower the input-output ratio. Secondly, the technology of this product determines its advantages and disadvantages. Generally, the welded steel pipe has high precision, uniform wall thickness and high brightness inside and outside the pipe (the surface brightness of the steel pipe is determined by the surface grade of the steel plate), and can be cut at any length. Therefore, it is economical and beautiful in the application of high-precision, medium and low-pressure fluids.
2. Classify (1) circular steel pipes (2) rectangular pipes according to the cross-sectional shape.
3.( 1) Thin-walled steel pipes are classified by wall thickness (2) Thick-walled steel pipes.