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Inspection and installation of flange 1. Open the product package to check whether the main part of the list or the contract in line with the product, inventory the number of products. 2. Check whether the product surface pits, scratches, rust fragments and oil, flange surface roughness of not more than 6.3μm, if the roughness does not match, then trim the flange surface, check the flange, bolt holes, etc., and cleaning method Blue face 3. Flange sealing surface should be smooth and smooth, no burr and radial groove; thread flange part of the thread should be complete, no damage; concave and convex sealing surface of the sealing surface should be able to naturally fit, the height of the convex surface shall not be lower than the concave Groove depth. 4. Check and clean bolts, nuts, apply insulating grease to all bolts and nut threads 5. Align the flanges to keep them coaxial, parallel, and carefully install the gasket, prohibit the use of lubricants, grease, and adhesives on the gasket and flange surfaces to prevent damage to the seals on the gasket. 6. Align the bolt holes and insert them into the fixed flange (especially for large flanges) with 30 perforated nails at least 120 degrees. 7. Insert bolts, nuts and washers. Lubricants with grease should first be fitted with stainless steel washers, preloaded bolts until the flange and gasket are in contact with each other 8. Use a micrometer, flashlight and other tools to check the gap between the flange and the gasket, if the gap exists, indicating that the flange assembly is not parallel. 9. If there is a gap, unscrew the nut a little bit and then retighten until the two flanges are in contact with the gasket. This method is necessary to prevent the flange from contacting the gasket. If the method is not correct Will also cause the flange and gasket contact with the bolt when the load is too large to damage the gasket seal. 10. Tighten the loose nuts again by following the recommended bolt tightening torque (10-15% bolt torque), remove the piercing studs, apply bolts, nuts, washers, and tighten with the same torque. 11. Continue to tighten the bolt and raise the preload to 50% of the bolt torque; continue to tighten the bolt until the final torque. 12. This is an operating procedure for effective tightening of bolts, especially for large diameter piping systems. 13. All of the above operations should use a torque wrench (mechanical or hydraulic) or use a bolt pretensioner. Source: China Flange Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

According to the research institutions to verify that the life of the coating depends on the type of coating, coating quality and construction environment and other factors, the surface treatment of alloy pipe on the life of the coating about 50%, therefore, should be strictly in accordance with the Code On the surface of the alloy elbows requirements, continue to explore and summarize, and constantly improve the surface treatment methods of alloy elbows. 1, cleaning of alloy elbows The use of solvents, emulsions to clean the surface of steel to achieve the removal of oil, grease, dust, lubricants and similar organic matter, but it can not remove the steel surface rust, oxide, welding, etc., so in the anti-corrosion production only as an auxiliary means. 2, The surface of the alloy elbows derusting Mainly the use of steel wire brush and other tools to polish the steel surface, you can remove loose or tilt of the oxide, rust, welding slag and so on. Manual tool derusting can reach Sa2 level, power tools rust can reach Sa3 level, if the steel surface attached to a solid iron oxide skin, tool rust effect is not ideal, not up to the requirements of anti-corrosion construction of the anchor depth 3, The pickling of the alloy elbows General use of chemical and electrolytic two methods for pickling treatment, pipeline corrosion only chemical pickling, you can remove the oxide, rust, the old coating, and sometimes can be used as a blasting and then re-treatment. Chemical cleaning, although the surface can achieve a certain degree of cleanliness and roughness, but the anchor is shallow, and easy to cause pollution to the environment. 4, The spray (throw) shot rust of alloy elbows Spray (throw) shot rust is driven by high-power motor spray (throw) shot high-speed rotation of the blade, steel sand, steel balls, wire segments, minerals and other abrasives in the centrifugal force on the surface of the alloy fittings spray (throw) , Not only can completely remove the rust, oxides and dirt, and the steel pipe in the abrasive impact and friction under the action, but also to achieve the required uniform roughness. Source: China Elbow Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

The pickling process of stainless steel lap joint stub end is an important process step of stainless steel pipe fittings, and that a lot of people ask, stainless steel flange itself will not rust, why pickling for it? Actually the process of pickling of stainless steel flange, a is to go out to bend in the machining process produced by high temperature oxide skin, let the edge of stainless steel products is bright and clean, beautiful; 2 it is to make the surface of the stainless steel to generate a compact oxidation film, thus further protection in the later use process, prevent them from rusting again. The pickling of stainless steel lap joint stub end is often linked with passivation, generally need must be passivation pickling of stainless steel, because of no formation on the surface passivation film after pickling or form passivation film thickness is very thin, not going to work, must increase subsequent passivation process, the formation and improvement of passivation film on stainless steel surface. Source: China Pipe Fitting Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless steel pipe fitting is not easy to rust and the composition of stainless steel has a great relationship. Stainless steel in addition to the composition of iron, there are chromium, nickel, aluminum, silicon and so on. General stainless steel chromium content is generally not less than 12%, high or even up to 18%. Steel added chromium and other elements, you can change the performance of steel, such as steel, such as the molecular structure is more uniform in the steel surface is more likely to generate a layer of dense oxide protective film, etc., thereby greatly improving the ability of stainless steel corrosion resistance. So stainless steel can resist fire, water, acid, alkali and a variety of solutions to its corrosion, no rust. Scientists have found that the more uniform the internal structure of steel, the more closely connected components, the more difficult the corrosive invasion, coupled with the surface and attached a layer of oxide protective film, like steel to wear armor, natural It is not easy to rust. The Requirements of Stainless Steel Pipe Fittings in Bridge Construction 1) durability requirements. Bridge in the marine environment, the design life of 120 years, the higher the durability requirements. 2) Save maintenance costs. The use of stainless steel pipe in the course of the use of the bridge without the need for regular maintenance, saving a lot of maintenance costs. 3) security requirements. Wind tunnel tests show that the lighter pylon is susceptible to vortex-induced vibration, which can also cause large-amplitude cable vibration. Therefore, in order to improve the aerodynamic performance of the pylon, the pylon is filled with concrete in the stainless steel pipe Stainless steel tube concrete structure. 4) looks beautiful. Source: China Pipe Fittings Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless steel pipe fitting is a kind of pipe fittings, stainless steel material is it made so called stainless steel pipe fittings, it includes: stainless steel elbow, stainless steel tee, cross stainless steel, stainless steel reducer, stainless steel pipe cap, etc., according to join method can be pided into the socket type stainless steel pipe fittings, flanges threaded stainless steel pipe fittings, stainless steel pipes and welded stainless steel pipe fittings four classes. Stainless steel elbow is used for fitting the turning places; Flange is used to make the pipe with pipe connecting parts, connection pipe, stainless steel tee to the meeting-place of three pipe; Stainless steel cross pipe used in the meeting-place of four pipe; Stainless steel reducer used for different pipe diameter of two pipes are connected. Main material: stainless steel 304 l, 304 l, 304, 304, 310, 321, etc. Processing and the related knowledge of transportation: 1. Stainless steel pipe fittings of multi-channel multi-layer welding arc used to welding, arc should fill arc crater. Banned in pipes and pipe fittings of the surface of the parent metal arc or the arc. By playing the arc or the arc found defects such as blowholes, cracks should be clean. 2. When the tack welding seam inside should be filled argon protection. 3. Stainless steel pipe fittings cutting cannot use the ordinary grinding wheel cutting, should use the special grinding wheel piece or plasma cutting. 4. After welding for pipe fittings for pickling and passivation. 5. In material handling, can’t direct contact with other metals, should be padded non-metallic materials such as wood or rubber sheet. Source: China Pipe Fitting Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless steel pipe fittings are widely used in tap water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction, is China’s development of one of the 20 key products. For liquid delivery with: water supply, drainage. For gas transmission with: gas, steam, liquefied petroleum gas. For the structure with: for piling pipe, for the bridge; terminal, road, building structure and so on. (1) stainless steel pipe manufacturing process can be pided into: hot rolling (extrusion), cold rolling (pull), thermal expansion of the basic categories of these. (2) welded pipe in accordance with the manufacturing process can be pided into: straight seam welded steel pipe, submerged arc welded steel pipe, coil butt welded steel pipe, welded pipe thermal expansion pipe. The following are the same as the “ (3) According to the shape of the pipe can be pided into square tube, rectangular tube, octagonal, hexagonal, D-shaped, pentagonal and other special-shaped steel pipe. Complex cross-section steel pipe, double concave steel pipe, five plum-shaped steel pipe, conical steel pipe, corrugated steel pipe, melon-shaped steel pipe, double convex steel pipe (4) Classification by use – Steel pipes for pipes, pipes for thermal equipment, Steel for mechanical industry, Steel for oil, Geological drilling, Containers, Pipe for chemical industry, Special purpose pipes, etc… Source: China Pipe Fittings Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless steel pipe fittings are widely used in both industrial and civilian applications. The choice of stainless steel pipe fittings when the quality of their own materials will affect its application, and some special industries such as petrochemical, nuclear, medical and other industries on the quality requirements of stainless steel pipe fittings higher. First, the gas protection welding in the welding of the gas under the protection of stainless steel surface of chromium and nickel will not be oxidized, retain the original characteristics of stainless steel and corrosion resistance; Second, pickling passivation: can make the water pipe and pipe wall to produce a thin and dense, hard passivation film, is to prevent the root causes of corrosion; Third, the bright solidification: stainless steel pipe after forming, welding process, must be 1050 degrees of solid solution to eliminate the stainless steel tube due to deformation caused by internal stress, reduce stress corrosion, recovery pipe welding process of intergranular changes, Carbide dissolved in austenite, to prevent adverse effects; Fourth, the sealing material: sealing material is the key point of the life of stainless steel pipe, sealing material life determines the life of stainless steel pipe fitting. Source: China Pipe Fittings Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Six methods of processing stainless steel pipe fittings: 1. roller method: put the core in the tube, the periphery with the roller push, for the edge processing. ​ 2. method: use type forging press machine will be at the end of the pipe or part shall be rushed out, the diameter reduced, commonly used swaging machine have rotary, connecting rod type, roller type. 3. bending method: there are three kinds of commonly used methods, a method called stretch method, another method called stamping method, third roller method, 3-4 roller, two fixed roller, a roller adjustment, adjust the fixed roller distance, the finished product is bent pipe. 4. rolling method: generally without mandrel, suitable for thick wall pipe inside round edge. 5. Method: one is placed in the rubber tube, with compression punch above the tube bulge forming; another method is hydraulic bulging in the middle pipe, filling liquid, liquid pressure into the pipe drum to the shape of corrugated pipe production with the most is this method. 6. stamping method: in the punch with the taper of the tube will be extended to the required size and shape. Six types of stainless steel pipe fittings processing conversion: Form one, with flange of pipe fitting, the former refers to the pipe end to the medial or lateral convex, which is a swell in the circumferential direction of the tube or groove pipe fittings; Form 2, thin-walled stainless steel elbow processed into thick wall stainless steel elbow, along the length direction pipe wall thickness changes; Form 3, stainless steel elbow, we contact more, is the straight pipe into different curvature radius of bend, such as the elbow, bend, and so on; Forms four, stainless steel elbow into diameter of pipe fittings, refers to one part of the tube or pipe diameter decreased; Form five, with edge and bottom sealing fitting, increase the pipe’s overall strength to pipe the inner or outer edge or the pipe end seal pipe fittings; Form processing pipe section, square, oval, circular section into a polygon. Source: China Pipe Fitting Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Three calculation methods of stainless steel pipe: (1): cold drawn seamless rectangular steel pipe calculation method: W (kg/m) = *4* thickness *0.00785 (2): the density of steel is 1.85kg/dm2, the formula for calculating the weight per meter is W (kg/m) =0.02466* wall thickness * (outer diameter wall thickness) (3): stainless steel pipe per meter weight formula: W (kg/m) =0.02491* wall thickness * (outer diameter – wall thickness) Source: China Steel Pipe Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless steel pipe fitting is a kind of pipe fittings, stainless steel material is it made so called stainless steel pipe fittings, which include: stainless steel elbow, stainless steel tee, stainless steel cross, stainless steel reducer, stainless steel pipe cap, etc., according to join method can be pided into the socket type stainless steel pipe fittings, flanges threaded stainless steel pipe fittings, stainless steel pipes and welded stainless steel pipe fittings four classes. Stainless steel pipe fittings used as pipes conveying fluid in great quantities, such as oil, natural gas, water, gas, steam, etc., in addition, doing bending and torsional strength phase at the same time, the weight is lighter, it is widely used in the manufacture of machinery parts and engineering structures. Stainless steel elbow is used for fitting the turning places; Flange is used to make the pipe with pipe connecting parts, connection in the pipe; Stainless steel tee for three pipes of the place; Stainless steel cross for four pipe collection place; The stainless steel reducer is used for the connection of two pipes of different diameters. Source: China Pipe Fitting Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

The stainless steel joint is made of stainless steel, which has the advantages of compact structure and high strength. Steel pipe and stainless steel joint connection is reliable, beautiful appearance; how to choose a good joint products? 1, the type of fluid, temperature (please select the type of fluid, the temperature of the body material and sealing material of stainless steel joint), according to the fluid, suitable for the body material, sealing material is different 2, the pressure of the liquid (please select suitable for the pressure of the fluid pressure resistance of the stainless steel joints), fluid pressure is also the key to the selection of quick joints. Corresponding to the pressure resistance, the structure of the stainless steel joint is also different. 3 stainless steel joint use of the environment (stainless steel joint structure, material select suitable in the environment), combined use of environmental humidity, dust, and easy corrosion of the use of the environment, to consider the type and material of body selected stainless steel joints. 4, the installation of the shape, size (please determine the final shape, size, order products) Source: China Pipe Fittings Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

In today’s industrial automation is becoming more common now, in production, to be without a well-made sight glasses.Stainless steel sight glass is installed on the piping or equipment can at any time to check the material within the monitoring work of a product. Stainless steel sight glass is made from 304/316 304/316 / l etc give priority to material produced by sight glasses. It has high corrosion resistance, and easy processing, beautiful appearance. Sight glasses at the same time use tempered borosilicate glass, polyethylene ptfe gasket. The stainless steel sight glass is suitable for most of the poor working environment. And a longer service life. Stainless steel sight glass due to compact structure, its installation is simple, easy to use, and easy cleaning and maintenance, is the most commonly used an optical lens. Which view mirror stainless steel equipment used in pressure vessel, chemical tower and other cylindrical device, and stainless steel pipe lens is suitable for chemical, oil, electric power line, etc. Source: China Sight Glass Manufacturer – wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)