The concept of stainless steel pipe: It is a hollow long steel material, which is widely used as a pipeline for transporting fluids, such as oil, natural gas, water, gas, steam, etc. In addition, when bending and torsional strength are the same, the weight is lighter, so it is also widely used in manufacturing mechanical parts and engineering structures. It is also commonly used to produce various conventional weapons, gun barrels, artillery shells, etc.
Application of stainless steel pipes: Stainless steel pipes are safe, reliable, hygienic, environmentally friendly, and economical. The thin-walled pipes and the successful development of new, reliable, simple, and convenient connection methods have given them more advantages that are irreplaceable by other pipes. They are widely used in engineering There will be more and more, the use will become more and more popular, and the prospects are promising.
Stainless steel pipe material: 201 (1Cr17Mn6Ni5N), 202 (1Cr18Mn8Ni5N), 301 (1Cr17Ni7), 302 (1Cr18Ni), 304 (0Cr18Ni9), SS304, TP304 304L (00Cr19Ni10), SS304L, TP304L 321 (1Cr18Ni9Ti), SS 321, TP321 316( 0Cr17Ni12Mo2), SS316, TP316 316L (0Cr17Ni14Mo2), SS316L, TP316L 310S (0Cr25N20), SS310S, TP310S
Stainless steel pipe implementation standards: 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 boilers and heat exchangers Structural steel thick-walled seamless steel pipe for (GJB2608-96) (YB676-73) (GJB2296-95) (YB678-71) stainless steel seamless steel pipe, (YB/T679-97) (YB679-71) for 18A hollow Rivet thin-walled seamless steel pipe (GJB2609-96) (YB680-71) structural thin-walled seamless steel pipe (YB/T681-97) (YB681-71) conduit 20A thin-walled seamless steel pipe GB3090-82 stainless steel small diameter steel pipe GB5310-95 Seamless steel pipe for high-pressure boilers GB3087-82 Low and medium pressure seamless steel pipe GB3089-92 Stainless acid-resistant extremely thin-walled seamless steel pipe GB9948-88 Petroleum cracking seamless steel pipe, ASTM A213 Ferrite and Austenitic alloy steel seamless steel pipe ASTM A269 General purpose austenitic stainless steel seamless steel pipe and welded steel pipe ASTM A312 Austenitic stainless steel seamless steel pipe Welded steel pipe Welded steel pipe ASTM A450 Carbon steel, ferritic and austenitic alloy steel pipe General requirements ASTM A530 General requirements for ferrous and alloy steels for special purposes, ASTM A789 General requirements Carbonite austenitic stainless steel seamless steel pipes and welded steel pipes JIS G3456-88 Stainless steel pipes for mechanical structures JIS G3448-88 Ordinary pipes Use stainless steel pipe
Stainless steel pipe classification
1. Classification by production method:
(1) Seamless steel pipe – cold drawn steel pipe, extruded steel pipe, cold rolled steel pipe. Stainless steel seamless steel pipe is a long steel material with a hollow section and no seams around it.
The manufacturing process and flow of seamless steel pipes: smelting > steel ingot > steel rolling > sawing > peeling > perforation > annealing > pickling > dusting > cold drawing > cutting > pickling > warehousing
Features of seamless steel pipe:
1. The thicker the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the processing cost will increase significantly;
2. The process of this 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 sizing, and pitting and black spots on the inner and outer surfaces that are difficult to remove;
3. Its detection and shaping must be processed offline. Therefore, it reflects its superiority in terms of high pressure, high strength, and mechanical structural materials.
(2)Welded steel pipe
(a) Classification by process – gas-shielded welded pipe, arc welded pipe, resistance welded pipe (high frequency, low frequency)
(b) According to welding seam – straight seam welded pipe, spiral welded pipe
Welded steel pipe, referred to as welded pipe, is a steel pipe made by welding steel plates or steel strips after being curled and formed by a unit and a mold.
The manufacturing process and flow of welded steel pipes: steel plate > slitting > forming > welding > induction bright heat treatment > internal and external weld bead treatment > shaping > sizing > eddy current testing > laser sizing > pickling > warehousing
1. Characteristics of welded steel pipes:
① This product is produced continuously online. The thicker the wall thickness, the greater the investment in the unit and welding equipment, and the less economical and practical it is. The thinner the wall thickness, its input-output ratio will decrease accordingly;
②The process of this product determines its advantages and disadvantages. Generally, welded steel pipes have high precision, uniform wall thickness, and high internal and external brightness (the surface brightness of the steel pipe is determined by the surface grade of the steel plate), and can be arbitrarily fixed in length. Therefore, it reflects its economy and aesthetics in high-precision, medium, and low-pressure fluid applications.
2. Classification according to cross-sectional shape (1) Circular steel pipe (2) Rectangular pipe
3. Classification by wall thickness (1) thin-walled steel pipe (2) thick-walled steel pipe
Post time: May-09-2024