At present, stainless steel backing is divided into two processes: back argon filling and non argon filling. Back argon filling protection can be divided into solid wire + TIG process and solid wire + TIG + water-soluble paper process; The back non argon filling protection is also divided into flux cored wire backing welding and welding rod (flux coated wire) backing TIG welding.Stainless steel has been used as a structural material for building new buildings and repairing historic sites for more than years. Early designs were calculated according to basic principles. Today, design codes, such as ANSI as of the American Society of civil engineers, are usedColombia, Series & mdash;At low temperature, ferritic or martensitic stainless steel produces low-temperature brittleness but austenitic steel does not. Therefore,ColombiaStainless steel shower pipe, 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 - ℃Obala,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, storage and processing, it must be completely cleaned, polished with an angle grinder and then polished Polishing with optical sheet or metallographic sandpaper.Combined steel and spring steel, such as CrMnTi simn, (C content is expressed in ten thousandths).Ferritic and martensitic stainless steels are represented by series numbers. Ferritic stainless steel is marked with and , martensitic stainless steel is marked with and C, dual phase (austenite ferrite).

After that, the second widely used steel is mainly used in food industry, pharmaceutical industry and surgical equipment. Adding molybdenum makes it obtain a special corrosion-resistant structure. Because it has better chloride corrosion resistance than stainless steel pipe, it is also used as & ldquo; marine steel & rdquo;. SS is usually used in nuclear fuel recovery devices. Grade stainless steel Steel pipes usually also meet this application level.The large electric clamping tool is V power supply, otherwise the dirt entering the oil circuit system will affect the normal use of the tool. Connect the main engine and hydraulic cylinder,Colombia317L stainless steel plate, turn on the power supply first, then tighten the pressure relief valve, wait until the pressure gauge rises to about MPa, or the main engine automatically trips, then open the pressure relief valve, turn off the power supply, and remove the tong head after complete pressure relief.The shape of pipe end stainless steel pipe can be divided into smooth pipe and threaded pipe (threaded steel pipe) according to the state of pipe end. Threading pipe can also be divided into ordinary threading pipe (pipe for conveying low pressure such as water and gas, which is connected by ordinary cylindrical or conical pipe thread) and special threaded pipe (pipe for petroleum and geological drilling, which is connected by special thread for important threading pipe). For some special pipes, in order to make up for the impact of thread on the strength of pipe end, the pipe end is usually thickened before threading (inner thickening, outer thickening or inner and outer thickening).Honesty is the foundation,The experimental ice load of concrete decorated stainless steel pipe is the highest in the cold areaFlux coated welding wire (self shielded welding wire) shall be used for backing TIG welding.When water-soluble paper is used to block the ventilation, due to the ventilation from the weld center, the ventilation pipe shall be pulled out quickly at the later sealing link, and the residual argon inside shall be used for protection, so as to quickly finish the bottom and seal the mouth.

W = (outer diameter wall thickness) & times; wall thickness & times; . = KGM (weight per meter).Focus on Development,ColombiaStainless steel binding tape,AUSTENITIC FERRITIC duplex stainless steel. It has the advantages of both austenitic and ferritic stainless steel, and has superplasticity. Martensitic stainless steel. High strength, but poor plasticity and weldability.　　· Cargo box of ship or truck & middot; Food processing equipment standard ASTM / ASME......... A UNS S / seuronorm......... xcrnimon afnor.................... Z CrNi azdin.............................. W. NR corrosion resistance uniform corrosion due to chromium content (%), molybdenum (%) and nitrogen content (.%),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, 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.Colombia, stainless C & le; .%, such as CRNI ultra low carbon C & le; .%, such as crnimo.The best way to improve the quality of stainless steel pipe fittings is to change the process from ingot to billet. Due to the improvement of continuous casting process this has become a necessary means to improve product quality.Low temperature processing of stainless steel pipe --- martensite series stainless steel is quenched from austenitizing temperature and then cooled to very low temperature to promote martensite quenching. It is suitable for stainless steel easy to produce residual austenite.