Austenitic stainless steel has good resistance to uniform corrosion, the greater the tendency of intergranular corrosion. In addition, intergranular corrosion also occurs in the heat affected zone of the weldment. This is due to the precipitation of Cr rich CrC on the grain boundary. The chromium poor area is formed in the surrounding matrix, which is caused by corrosion of the primary cell. This intergranular corrosion phenomenon also exists in the ferritic stainless steel mentioned above.Stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, bimetallic composite pipes, coated and coated pipes to save precious metals and meet special requirements. Stainless steel pipes have a wide variety, different uses, different technical requirements and different production. The outer diameter range of steel pipe currently produced is . & mdash; mm, wall thickness range . ~ mm. In order to distinguish its characteristics, we specialize in providing quality assurance for L stainless steel pipe, s stainless steel pipe and L stainless steel pipe. During the preferential activities new and old customers are welcome to consult. Steel pipes are usually classified according to the following.Ptuj,Cold rolled oriented silicon steel strip (sheet) represents: times of DQ + iron loss value (at the frequency of Hz, the waveform is sinusoidal, and the magnetic induction peak value is the unit weight iron loss value of T) + times of thickness value. Sometimes, G is added after the iron loss value to represent high magnetic induction. For example, dq represents cold rolled oriented silicon steel strip (sheet) with iron loss value of and thickness of .mm. Now the new model is q.Stainless steel pipes can be divided into CR series ( Series), Cr Ni series ( Series), Cr Mn Ni series ( Series) and precipitation hardening series ( Series). Series & mdash; Cr Ni Mn austenitic stainless steel series & mdash; Cr Ni austenitic stainless steel.Glenn Hing,When improved, it is possible to use it in refrigeration related engineering. Recently, suslx (cr Ti, Nb LC) and susl have been applied to frozen shells. Ferritic stainless steel has body centered cubic structure. When the material properties become weaker, 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.The specific steps of continuous casting billet process of stainless steel pipe fittings are as follows: according to different steel grades, the vibration process of mold is matched with protective slag, save energy and shorten the production cycle, so as to improve the yield of molten steel.Clamping connection steps: cut off the pipe according to the required length. When breaking the pipe, it shall not be too large to prevent the pipe from being out of round.

Austenitic stainless steel has good resistance to uniform corrosion, but there are still the following problems in local corrosion resistance: intergranular corrosion of austenitic stainless steel. Austenitic stainless steel will have intergranular corrosion when it is kept warm at ~ ℃ or cooled slowly. The higher the carbon content, the greater the tendency of intergranular corrosion. In addition, intergranular corrosion also occurs in the heat affected zone of the weldment. This is due to the precipitation of Cr rich CrC on the grain boundary. The chromium poor area is formed in the surrounding matrix,PtujPrice of stainless steel pipe, which is caused by corrosion of the primary cell. This intergranular corrosion phenomenon also exists in the ferritic stainless steel mentioned above.It is generally suitable for the welding of thin plates below mm, with the characteristics of beautiful weld formation and small welding deformation.High frequency welding high frequency welding: with relatively high power supply, it can reach a higher welding speed for steel pipes with different materials, outer diameter and wall thickness. Compared with argon arc welding, it is more than ten times its high welding speed. Therefore, it is difficult to remove burrs in welded pipes. At present, high frequency welding Welded stainless steel pipe can not be borne by chemical and nuclear industries, which is also one of the reasons.original,Model & mdash; The addition of sulfur improves the processability of the material.The corrosion resistance is the same, and the strength is better because the carbon content is relatively high.Model & mdash; The corrosion resistance is the same, and the strength is better because the carbon content is relatively high.

Model & mdash; other properties are similar except that the risk of weld corrosion is reduced due to the addition of titanium.Inspection items,The scale pretreatment of stainless steel pipe makes the scale loose, and then acid pickling is carried out for easy removal. The pretreatment can be divided into the following: alkaline salt melting treatment method. The alkaline melt contains % hydroxide and % salt. The proportion of the two in the molten salt shall be strict, so that the molten salt has strong oxidizing power,Ptuj304 stainless steel plate quality, low melting point and small viscosity. Only the sodium halo shall be analyzed in the production process and the content shall not be less than % (wt) It is treated in a salt bath furnace at ~ ℃ for minutes for ferritic stainless steel and minutes for austenitic stainless steel. Similarly, iron oxides and spinels can also be oxidized by salt to become loose ferric oxide,PtujStainless steel plastic coated pipe, which is easy to be removed during acid pickling. Due to the action of high temperature, some of the formed oxides peel off and sink to the furnace bottom in the form of sediment. Alkaline salt melting pretreatment Process flow: steam degreasing → preheating ( ~ ℃, time ~ min) ↠ molten salt treatment & rarr; water quenching & rarr; hot water washing. Molten salt treatment is not suitable for assemblies with weld gap or crimping. When the parts are taken out of the molten salt furnace, a stream of alkali and salt mist will be splashed during water quenching, so deep well anti splash water quenching tank shall be used during water quenching. During water quenching, firstly lift the parts basket into the tank, stop above the horizontal plane close the tank cover, and then lower the parts basket into the water, Professional L stainless steel pipe, s stainless steel pipe and L stainless steel pipe are stable, safe, reliable and maintenance free. The technical level has reached the domestic level and the international advanced level of similar products until submerged.: stainless steel pipe: seamless pipe and seamless pipe (longitudinal welded pipe, decorative pipe welded pipe, welded pipe, bright pipe). There are more than kinds of standard specifications of stainless steel pipe, all sizes, especially the capillary. The capillary is poor to be made of material, otherwise the pipe is easy to burst. You can also customize non-standard pipes for customers. Seamless pipes are mainly used in industry, and the surface is foggy, Not bright. The surface of the slotted pipe is a bright surface, and there is a thin welding line in the pipe, commonly known as welded pipe, which is mainly used for decorative materials. In addition, the pressure resistance of industrial fluid pipe depends on the wall thickness. and S are high temperature resistant pipes. They can be used normally below degrees, and the high temperature resistance can reach degreesDuplex stainless steel product description: This stainless steel has good corrosion resistance in urea carbamate solution and high stress corrosion cracking resistance in chloride environment. At the same time, the duplex stainless steel has excellent mechanical properties and can be used in plant construction with high safety requirements.Ptuj,Proper heat treatment process can prevent intergranular corrosion and obtain excellent corrosion resistance.In many construction sites, we use this kind of welding for priming, which can effectively ensure its quality and has certain construction difficulties. Therefore, careful and skilled welders should be selected for this work.Bidirectional Product Description: the tensile strength of the material is ~ mpa and the high working temperature can reach ℃.