WellandStainless steel pipe threading3 categories
Water preparation, storage, transportation, purification, regeneration, seawater desalination and other water industry excellent materials. The demand is about tons.W = (outer diameter wall thickness) & times; wall thickness & times; . = KGM (weight per meter).Welland, series & mdash; Chromium nickel manganese austenitic stainless steel.Editor's note on the causes of steel rusting: chloride ions exist widely, such as salt, sweat stains, seawater, sea breeze, etc. stainless steel corrodes rapidly in the presence of chloride ions, 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 [].Bayamo,When installing and welding the fixed port of stainless steel pipe, it is difficult to vent on the inner side, and some sides are easy to be blocked. In this case, water-soluble paper + blocking plate can be used for blocking. That is, the easy to vent and good side can be blocked with blocking plate the difficult to vent and bad blocking plate side can be blocked with water-soluble paper, and the weld on the outer side can be blocked with adhesive tape (see Table ) .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)Welding of stainless steel pipe argon arc welding stainless steel pipe: it is required to have deep penetration,Welland26 stainless steel plate, 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, nuclear and food industries.
Model & mdash; Martensite (high strength chromium steel) good wear resistance and poor corrosion resistance.High pressure water jet cutting (professional water cutting: Shanghai Xinwei)In engineering, that is 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, 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 .%.average method,When hoisting stainless steel pipes, public slings, such as hoisting belt and public collet number, shall be used. It is strictly prohibited to use steel wire rope to avoid scratching the surface; and when hoisting and placing, it shall prevent scratching caused by impact and collision. If there are surface scratches, electric arc traces and surface purification in the process of transportation,WellandStainless steel chain plate mesh belt, storage and processing, it must be completely cleaned, polished with an angle grinder, and then polished Polishing with optical sheet or metallographic sandpaper.W = (outer diameter wall thickness) & times; wall thickness & times; . = KGM (weight per meter).And stainless steel are molybdenum containing stainless steels. The molybdenum content of stainless steel is slightly higher than that of stainless steel. Due to the molybdenum content in stainless steel, when the concentration is lower than % and higher than %, stainless steel has a wide range of applications. Stainless steel also has good chloride corrosion resistance, the deformation energy is small. In low temperature environment, the phenomenon of reduced elongation and area shrinkage is called low temperature embrittlement. It is mostly produced on the body centered cubic structure of ferrite series.Honesty is the foundation,With the implementation of China's reform and opening up the national economy has achieved rapid growth, public buildings and tourism facilities have been built and a large number of urban houses, which puts forward new requirements for hot water supply and domestic water supply. In particular, people pay more and more attention to the problem of water quality, and the requirements are also increasing. Galvanized steel pipe, a common pipe, will gradually withdraw from the historical stage under the influence of relevant countries because of its corrosivity. Plastic pipe, composite pipe and copper pipe have become common pipes in the pipeline system. However, under certain circumstances, stainless steel pipe has more advantages, especially the stainless steel pipe with wall thickness of only . ~ mm. In high-quality drinking water system, hot water system and water supply system that puts safety and sanitation first, it has the characteristics of safety, reliability, sanitation, environmental protection, energy-saving and environmental protection pipes with good comprehensive performance of water supply system. It is also a very competitive water supply pipe,Welland1cr12wmov stainless steel plate, which will play an incomparable role in improving water quality and people's living standards. — Good heat resistance, weak corrosion resistance, % Cr, which has strict requirements on the chemical composition and temperature of molten steel; In order to prevent secondary oxidation of molten steel, non oxidation protection pouring is required during continuous casting production; Strict requirements for refractory materials such as ladle, tundish, nozzle and submerged nozzle.Welland,There are mechanical, chemical and electrochemical methods to remove the scale of stainless steel pipe. Due to the complexity of the composition of the scale of stainless steel pipe, it is not easy to remove the scale on the surface and make the surface highly clear and flat. Generally, the removal of the scale of stainless steel pipe should be carried out in two steps, the first step is pretreatment and the second step is ash removal.Model & mdash; Commonly used precipitation hardening stainless steel model, usually also called -; %Cr,%Ni.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.