W = (outer diameter wall thickness) & times; wall thickness & times; . = KGM (weight per meter).When the stainless steel pipe with solid core welding wire is prefabricated, the welded junction can usually be rotated for welding, and the ventilation is very easy. At this time the blocking plate is usually used to block both sides of the welded junction in the pipe, and the bottom welding is carried out for the protection of ventilation (see Table ), and the outside is blocked with adhesive cloth.Moca,Prepare materials and tools, prepare corresponding materials and tools, and check whether they match and apply.According to the purpose, it can be divided into oil well pipe (casing, oil pipe and drill pipe), pipeline pipe, boiler pipe, mechanical structure pipe, hydraulic prop pipe, gas cylinder pipe, geological pipe, chemical pipe (high-pressure chemical fertilizer pipe,Production process of stainless steel pipe A. preparation of round steel; b. Heating; c. Hot rolling perforation; d. Cutting head; e. Pickling; f. Grinding; g．； h. Cold rolling; i. Degreasing; j. Solution heat treatment; k. Straightening; l. Pipe cutting; m. Pickling; n. Finished product inspection.Stainless steel pipe is a kind of hollow long round steel, chemical industry, medical treatment, food, light industry, mechanical instruments and mechanical structural parts. In addition, when the bending and torsional strength are the same, the weight is relatively light. It provides L stainless steel pipe, s stainless steel pipe and L stainless steel pipe for a long time. It is an old brand of , with advantages in price and guaranteed quality It is also widely used in manufacturing mechanical parts and engineering structures. It is also commonly used as furniture, kitchenware, etc.No solution treatment. The alloy elements do not dissolve into the matrix, resulting in low alloy content and poor corrosion resistance.

Editor's note on the causes of steel rusting: chloride ions exist widely, such as salt, sweat stains, seawater, sea breeze, soil, etc. stainless steel corrodes rapidly in the presence of chloride ions,MocaStainless steel industrial pipe, even surpassing ordinary low-carbon steel. Chloride ions form complexes with Fe in alloy elements, reducing the positive potential of Fe, and then being stripped of electrons and oxidized [].Both ends of the steel pipe shall be cut into right angles and burrs shall be removed.Stainless steel export is an important part of China's export economy. It plays an important role in stimulating China's economic growth. However from the current situation of China's stainless steel foreign trade, China's stainless steel export has encountered great resistance.Production department,The corrosion resistance is the same, and the strength is better because the carbon content is relatively high.Hardness test: annealed stainless steel pipes with inner diameter of more than mm and wall thickness of less than mm can be tested by w-b Vickers hardness tester, which is very fast and simple, and is suitable for rapid and nondestructive qualification test of stainless steel pipes. For stainless steel pipes with inner diameter of more than mm and wall thickness of more than mm, Rockwell hardness tester shall be used to test HRC hardness. Stainless steel pipes For stainless steel pipes with inner diameter greater than mm and wall thickness less than mm, the surface Rockwell hardness tester shall be used to test HRT or hrn hardness. For stainless steel pipes with inner diameter less than mm and greater than mm, the special Rockwell hardness tester for pipes shall be used to test hrt hardness. When the inner diameter of stainless steel pipes is greater than mm, the Rockwell or surface Rockwell hardness tester can also be used to test the hardness of pipes.The main way to prevent stress corrosion of austenitic stainless steel is to add SI ~ % and keep the content of N below .% from smelting. In addition, the content of impurities such as P,Moca253MA stainless steel, Sb, Bi and as should be reduced as much as possible. In addition, A-F dual phase steel can be selected, which does not correspond to stress corrosion in Cl - and oh - media. The initial micro crack will not continue to expand after encountering ferrite phase, and the ferrite content should be about % .

Stainless steel pipe packing bag is nothing more than the function of protecting the surface of stainless steel pipe, so most stainless steel pipe users do not have to question this point.management,At low temperature, ferritic stainless steel pipe has low-temperature brittleness like carbon steel, but austenitic steel does not. Therefore, ferritic or martensitic stainless steel produces low-temperature brittleness, while austenitic stainless steel or nickel base alloy does not show low-temperature brittleness. Sus (Cr) and SUS (cr) of ferritic stainless steel pipe It shows that the impact value decreases sharply at low temperature. Therefore, it is necessary to pay special attention when using at low temperature. As a way to improve the impact toughness of ferritic series stainless steel, high purification process can be considered. With the help of C and N level, the embrittlement temperature is in the range of - ℃ to - ℃There are ba face, b face,Moca304L stainless steel square tube, D face, (frosted), HL (wire drawing), K face and other surfaces with good quality and brightness.Welding of stainless steel pipe argon arc welding stainless steel pipe: it is required to have deep penetration no oxide inclusion, and the heat affected zone can be as small as possible. Argon arc welding maintained by tungsten inert gas has good compliance high welding quality and good penetration function. Its commodities are widely used in chemical,Stainless steel export is an important part of China's export economy. It plays an important role in stimulating China's economic growth. However nuclear and food industries.Moca, from the current situation of China's stainless steel foreign trade, it is possible to use it in refrigeration related engineering. Recently, Nb LC) and susl have been applied to frozen shells. Ferritic stainless steel has body centered cubic structure. When the material properties become weaker, sharp cracks will expand rapidly and cause brittleness. Austenitic series stainless steel will not produce brittleness because it has face centered cubic structure. Austrian stainless steel SUSL (cr-ni LC) and SUSL (cr-ni-mo-lc) shows that it still has superior impact characteristics at low temperature. However, pay attention to the precipitation of ferrite or martensite due to processing, and the tendency of embrittlement due to sensitized carbide or & sigma; equal heterogeneous precipitation.Stainless steel pipe is safe, reliable, hygienic, environmentally friendly, economical and applicable. The successful development of pipeline and new reliable, simple and convenient connection makes it have more irreplaceable advantages of other pipes. It will be used more and more in engineering, and the use will be more and more popular. It has a good prospect.