Lac304 stainless steel weir plateIntroduction of protection measures

717HP127443542   ·  2023-04-13 13:12:52   ·   Building materials

Stop the written technical disclosure, on-site technical and safety disclosure to the on-site operators.Assembly: the sealing ring shall be correctly installed in the U-groove of the pipe fitting, put the pipe into the socket of the pipe fitting and wait for crimping.Lac,The length of tungsten electrode protruding from the gas nozzle is preferably ~ mm. In places with poor shielding such as fillet welding, it is ~ mm, and in places with deep groove, it is ~ mm. The distance from the nozzle to the working is generally no more than mm.In engineering, the following methods are often used to prevent intergranular corrosion: reduce the amount of carbon in steel so that the amount of carbon in steel is lower than the saturated solubility of austenite in equilibrium, that is fundamentally solve the problem of precipitation of chromium carbide (crc) on the grain boundary. Generally, the requirement of intergranular corrosion resistance can be met when the amount of carbon in steel is reduced to less than .%.Estelgom,Formula for hydraulic test pressure of stainless steel welded pipe for weight calculation fluid (gbt-): where: P - test pressure, MPa; R - stress, taking yield point of %, MPa; s - nominal wall thickness of steel pipe, mm.In engineering, that is, fundamentally solve the problem of precipitation of chromium carbide (crc) on the grain boundary. Generally, the requirement of intergranular corrosion resistance can be met when the amount of carbon in steel is reduced to less than .%.Solution treatment. The main purpose of water quenching after heating the steel to ~ ℃ is to dissolve the carbide in austenite and keep this state to room temperature, so that the corrosion resistance of the steel will be greatly improved. As mentioned above, in order to prevent intergranular corrosion,LacStainless steel pipe material, solid solution treatment is usually used to dissolve CrC in austenite and then cool rapidly. Air cooling can be adopted for parts, and water cooling is generally adopted.


Lac304 stainless steel weir plateIntroduction of protection measures



Measures to improve the welding quality of stainless steel pipe in order to ensure that the outer surface of stainless steel pipe is not damaged and purified, mainly including the following three aspects: the processing and consumption of stainless steel pipe should have a special consumption workshop (wood board is well used) , avoid the machining platform of austenitic stainless steel and carbon steel or solid overhead.Stainless steel has the ability of atmospheric oxidation, that is, it does not rust. At the same time, it also has the ability of corrosion resistance in the medium containing acid, alkali and salt, that is, corrosion resistance. However, its corrosion resistance changes with its own chemical composition, mutual state, service conditions and environmental medium type. For example, has absolutely excellent corrosion resistance in dry and clean atmosphere, but it is moved to In coastal areas, in the sea fog with a lot of salt, while stainless steel performs well. Therefore, not any kind of stainless steel can resist corrosion and rust at any time Series & mdash; Heat resistant chromium alloy steel.Potential development,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.The numbering rules adopt element symbols; Pinyin open hearth steel: p; Boiling steel: F; Killed steel: B; Class a steel: a; T: special GCr: ball.Decorative stainless steel pipe: usually the outer wall is relatively bright, so its name is considered. Decorative stainless steel pipe is used for decorative purposes. The stainless steel pipe for general decorative purposes is relatively thin. Because it is different from the manufacturing process of stainless steel product pipe, the price also varies greatly. The general production process of decorative stainless steel pipe is ordinary welded stainless steel pipe. Guangdong stainless steel product pipe stainless steel product pipe: generally, the surface of stainless steel product pipe is also a bright surface, and a small number of pipes with acid pickling industrial surface. As mentioned above, stainless steel product pipe belongs to the purpose of stainless steel products,LacStainless steel sanitary pipe, because the outer diameter size, mechanical properties, acid, alkali and corrosion resistance of stainless steel pipe are relatively good, Therefore, stainless steel pipes are generally used as anti-corrosion materials or hardware products in large-scale production enterprises. The production process of stainless steel pipes is one-time forming, and nitrogen protection is also added during welding.


Lac304 stainless steel weir plateIntroduction of protection measures



Production mode stainless steel pipe can be divided into seamless pipe and welded pipe according to the production mode. Seamless steel pipe can be divided into hot-rolled pipe cold-rolled pipe, cold drawn pipe and pipe. Cold drawing and cold rolling are the secondary processing of steel pipe; Welded pipe is divided into straight seam welded pipe and spiral welded pipe.Quality documents,Stainless steel pipe is safe,LacModel of stainless steel pipe, reliable, hygienic, environmentally friendly, and the use will be more and more popular. It has a good prospect.After the pipeline is installed and the pressure test is qualified simple and convenient connection makes it have more irreplaceable advantages of other pipes. It will be used more and more in engineering, it is better to wash with low chloride ion water and disinfect with .% potassium permanganate.Stress relief treatment. Stress relief treatment is a heat treatment process to eliminate the residual stress of steel after cold working or welding. It is generally heated to ~ ℃ for tempering. For steels without stabilizing elements Ti and Nb, the heating temperature shall not exceed ℃, so as to avoid intergranular corrosion caused by chromium carbide precipitation. For cold worked and welded parts of ultra-low carbon and stainless steel containing Ti and Nb, they need to be heated at ~ ℃ and then cooled slowly to eliminate stress (the upper limit temperature is taken for eliminating welding stress), which can reduce the tendency of intergranular corrosion and improve the stress corrosion resistance of steel.Lac,Model & mdash; Commonly used precipitation hardening stainless steel model, usually also called -; %Cr,%Ni.Argon shall conform to the rules of national specifications, and argon with purity of % shall be selected. If the content of impurities is too high, the maintenance effect of argon will be weakened and the weld quality will be indirectly affected.Only soluble paper or the combination of soluble paper and blocking plate is used for blocking ventilation protection (i.e. solid core welding wire + TIG + water-soluble paper)

3 Replies   |  until 2023-04-13 13:12:52 | 151 Views

Yaoyang Dingsheng Recycling Material Recycling Company 2023-04-13 14:45:42 support  0 | be opposed to  0

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Bath service 2023-04-13 15:00:02 support  0 | be opposed to  0

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cable tray 2023-04-13 14:04:16 support  0 | be opposed to  0

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