flange fittings pipes

Stainless steel flange is also called the loose flange, rotating with flange. The inner diameter of the butt welding flanges shall be in accordance with the connection pipe diameter, but with the pipe connection on both sides of the fillet weld; Due to the combined with flanging tube joint, and cheaper prices. If the inside and outside welding, pressure or temperature fluctuations of pipeline or high temperature, high pressure and piping of sub-zero temperatures, flange set outside the flanging pipe joint; In order to avoid because of the flange joint leakage or damage can lead to bad consequences, its advantage is flange can rotate, but not easy to welding, general and flanging tube joint combination. Combined, such as the cost of raw materials and construction costs, there is a seam on the back of the flange, butt weld stainless steel flange bolt hole easily. Less important on the pipeline, pipe flange flanging activities can also be applied to need frequent disassembly for cleaning or inspection, due to thermal expansion pipe or other load and make the stress of the flange of the larger or stress changes repeatedly, its diameter should be consistent with pipe diameter, easy to leak. Should not be used in place of temperature fluctuation repeatedly. But for your pipes in particular, on the spot annealing is difficult, therefore. Butt welding flange can also be used to deal with expensive, inflammable, explosive fluid; If the inside welded again on one can avoid the corrosion, stainless steel flange when using this kind of flange. Socket welding flange its basic shape the same as the flat welding flange, flange and pipe connection in the form of butt welding, welding, thread, socket welding and flanging activity type (also called loose flange), etc;Stainless steel flange easier due to the pressure fluctuations, temperature fluctuations, vibrations and shocks are not serious occasions during welding assembly line, or only when the alignment flange bol,مواسير شفة ...ادامه مطلب

When countries facing the world opening, merchandise exports and imports has become one of the most common communication content. A lot of goods to the world have a better development, flange for this commodity is no exception. But this kind of goods for China, the market prospect is not optimistic, in the first is how export flange with overseas stock traders get close contact as soon as possible do a simple introduction:First of all, the exporter should pay attention to, not can use the way of writing or respects is the way to establish close contact with overseas suppliers. Because for merchants to import flange, received many letters every day, but in fact these letters tend to be handled with as rubbish. Because this way will waste precious time in the history of replenish onr's stock, because these overseas stock traders like to use more direct and more convenient way. , of course, if there are any business urgently needs to find a partner, your way of writing are also likely to be successful, but the hope too slim.Second, most can communicate is set up for the market of the country for a friendly visit, and then to interview you want to establish business relations company. For the two cities went to Sydney or Melboue goods access, usually in the area of outlet flange can have more chance to meet major importers. Need to do is to remind here, must make appointments before the meeting, this is also an aspect of etiquette.Once get the chance to meet the importer, the first to use the price of a product attract purchase business in Australia. Because of Australian businessmen don't like to bargain, as long as they think the price is more appropriate, they will be willing to go to the next link exchanges. But it also from another side, let us know that all the businessmen care most about a problem is the price of the product. Once the commodity price recognised by the Australian businessman, they in the production process of suppliers after inve,مواسير شفة ...ادامه مطلب

It is due to the use of stainless steel material production and become the widespread use of flange, so led to this kind of material in the supply of the flange it is good for the manufacturer to a message. Although the number of production is very important, but the importance of quality seems better, this requires manufacturers in the production of stainless steel flange well below these considerations, in order to guarantee the use effect.The first point, easy to avoid corrosion of stainless steel materialFor stainless steel the material on the surface of the the most important thing is to keep it clean, once after corrosion of the stainless steel surface will change the appearance, not so bright and clean. So all those who have the ability of stainless steel corrosion things will be far away from the production. Both acidic and alkaline gases or liquids are far away from the production environment.The second point, chosen the collocation of flange gasketThe effect of flange connecting pipe above is indeed great, but little also not of gasket. A good helper in the collocation of use of stainless steel flange is asbestos gasket. Asbestos the material itself has very good properties, it can resist acid, either gas or liquid can be well absorbed by asbestos, so as not to affect the stainless steel. A little on special occasions, of course, also use other materials to the production of gaskets, this time to choose and with complementary ability of stainless steel gasket.The third point, to consider the connection flange productionIn there are different ways of connecting pipe, the pipe is thin can tu directly using the thread flange screw connection, some stainless steel flange facing some there is a big pressure pipeline, you will need to use to the welding, so that more solid and reliable. Material made of stainless steel flange still had better choose welding connection, both for the pipe pressure is big or small. Stainless steel welded connection is ver,مواسير شفة ...ادامه مطلب

Reciprocating piston compressor, the most commonly used positive displacement compressor, has the advantages of mature technology, wide range of pressure, high thermal efficiency, strong adaptability, large range of exhaust volume regulation, low material requirements, and is widely used in various gas compression airports in the fields of petroleum and chemical industry.The weldolet is often used for the transition connection between the main pipe and branch pipe of the safety valve, and the threaded weldolet is often used for the transition connection between the main pipe and the temperature and pressure measurement end.Compared with the traditional connection type, the branch connection has many outstanding advantages, such as safety and reliability, cost reduction, simple construction, improvement of medium flow channel, series standardization, and convenient design and selection.However, the special structure and weld form of the weldolet increase the difficulty of detection and the complexity of the process. The lack of penetration in the welding process is difficult to detect scientifically and repair effectively. The lack of penetration in the joint has a great influence on the structure. It reduces the effective bearing area of the weld, reduces the strength of the welded joint, causes stress concentration, and increases the safety risk of the unit.Observation and analysis of inteal appearance of welding joint of weldoletThe appearance of welds on weldolet and main pipe of a unit is shown in Figure 1, and the inteal section is shown in Figure 2.Figure 1Figure 2It can be seen from Fig. 2 that there are a large number of incomplete penetration in the connection weld of weldolet abutment in the actual production process. The possible causes of incomplete penetration are irregular opening, too small assembly gap, improper welding position, too small current, too fast running speed, arc blowing deviation, etc.Cause analysisIrregular openingThe weld appearance w,مواسير شفة ...ادامه مطلب

When selecting a flange connection with fastener materials stainless steel flange, pipeline operating pressure, operating temperature ought to be considered at the same time, medium type and gasket type and other factors. Gasket type and operating pressure, operating temperature, directly to the fastener material strength requirements are put forward.For example, the spiral wound gasket seal of low toxic medium pipeline flange connection, although the pipeline operation pressure and temperature is not high, but because of the spiral wound gasket needed to form the initial seal than pressure, and fasteners to bear load is big, therefore, in this case requires fasteners with high strength alloy steel materials.Alloy steel stud shall adopt high quality steel. The material mark after all should add letters A, such as 35 crmoa, 25 crmova according to different structure, the bolt can be pided into hexagon head bolts and stud (also known as the stud) two kinds, the stud is pided into two kinds of haess and the haess.Hexagon head bolts: often used with flat welding flange and non-metallic gaskets with milder conditions for operation. Commonly used material is BL3 or hex head bolt is Q235B; Stud: often used with butt welding flange at the operating condition is harsh working conditions, among them, because there is no cross section shape on the haess type stud, so its bearing capacity is strong. Rather than type haess stud is relatively weak bearing capacity. Nut materials often according to and cooperate with bolt material, these combinations have provisions in the general standard.Under normal circumstances, the nut material should be slightly below the bolt, and ensure the nut hardness is lower than bolt hardness HB30 around.,مواسير شفة ...ادامه مطلب

Flange on some professional connection is one of the very common parts, whether it's part of the equipment connections, or the whole pipeline connection, they all need to use this part to the flange. Water pump connection is a part of the connection, this time will need to use the stainless steel flange parts. Flange can be used in many types of connection, a little small connection valves, large connection like pipeline engineering.First, the flange gasket materialThe vast majority of the flange gasket is never is a chunk of metal material cutting down above, the production and the flange gasket is also need by those very professional manufacturers. Production need according to certain size because the gasket is combined with flange, so size to match the flange.Stainless steel flange gasket materials species persity, asbestos, rubber sheet, asbestos board has, and polyethylene this synthetic material. In addition to non-metallic materials and some metal materials gaskets, where metal materials are very thin metal plate (material, such as galvanized sheet and stainless steel.Second, combined flange gasketWant more good sealing performance, you will need to make their own installed for use. Of metal gasket is made and some nonmetallic material similar to that of asbestos, of this package them together is the metal package gaskets. In addition to the gasket and a spiral wound gasket. When the gasket stainless steel flange connection is also very common. This is the use of thin steel tape material and asbestos tape wrapped together is made and be become.Third, flange gasket suitable occasionDifferent flange gasket can be used in different environments, some common rubber gasket can be used in the environment of temperature is not particularly high, generally need to temperatures below one hundred and twenty degrees Celsius. In stainless steel flange connection of asbestos rubber gaskets are also common, their use in need of water vapor temperature be,مواسير شفة ...ادامه مطلب

Austenitic stainless steel with solid solution treatment to soften, the steel wire are heated to a temperature of about 950 ~ 1150 ℃, heat preservation for a period of time, make the carbide and various alloy elements fully dissolved in austenite, evenly and rapid quenching water cooling, carbon and other alloying elements can not afford time to precipitate, obtain pure austenitic organization, called the solid solution treatment. The effect of solid solution treatment with three points.1, make steel wire organization, and composition is uniform, it is especially important for raw materials, because of the hot rolled wire rod paragraphs is not the same as the rolling temperature and cooling speed, caused the organizational structure. Atomic activity increased at high temperatures, the sigma phase solubility, tend to be more uniform chemical composition, rapid cooling after get uniform single-phase organization.2, remove the work hardening, can continue to cold. Through the solid solution treatment, skew lattice, elongation and breakage of recrystallized grains, eliminate inteal stress, the steel wire tensile strength decreased, elongation increased.3, restore the inherent corrosion resistance stainless steel. Carbide precipitation due to cold working, lattice defects, make stainless steel corrosion resistant performance degradation. Steel corrosion resistance after solid solution treatment back to his best.For stainless steel flange, the three elements of solid solution treatment temperature, holding time and cooling rate. Solid solution temperature is mainly determined according to chemical composition. Generally speaking, variety and high content of alloy elements brand, to increase solid solution temperature. Especially manganese, molybdenum, nickel, high content of silicon steel, only to improve the solid solution temperature, make it dissolves, to achieve a softening effect. But stabilized steel, such as 1 cr18ni9ti, solid solution at high temper,مواسير شفة ...ادامه مطلب

Stainless steel flange is used widely in mode industrial one of a kind of material, admired for many years, also let many businesses see business opportunities, have come into the production of stainless steel flange industry. There are a lot of friends don't really know the stainless steel flange, just feel familiar for this name. If don't participate in industry, many industries will not be able to normal operation, our life will be hit by the very serious also. Stainless steel flange is not mysterious, just to tell you that what is called stainless steel flange.First, the classification of manyIs the so-called birds of a feather flock together a person with group of points, there are certain classification, so is a stainless steel flange. For the simplest case, just as we often see the film. Movie just a broad categories, also can be pided into: thin horror film, literature and art films, comedy, martial arts films... Many branches. In stainless steel, stainless steel flange, flange, can be pided into five categories, that is the most basic of five types of stainless steel flanges, pided into: butt welding flange, screw, flat welding, socket welding... Such as flange. Different types of stainless steel flange, on the design structure is different, can play a different role.Second, design more integrityStainless steel flange on design has more integrity, resistance to corrosion of the stainless steel itself is very strong, because of strong corrosion resistance, in order to guarantee the use of stainless steel flange normal, not rusting, beyond the general of the flange. Because of the high strength of corrosion resistant ability, structure parts can remain in the best state, the same as the original design of the complete, effectively play a biggest role. Stainless steel flange is different, but all giant won't produce the phenomenon of corrosion or wear and tear, is the use of industrial production and use.In the design of the stainless steel&nb,مواسير شفة ...ادامه مطلب

Speaking of stainless steel flange, estimates there are a lot of friends for this name is very strange, stainless steel flange is very versatile. But there are a lot of friends do not know what is its true purpose. Here, let us come into the real world of stainless steel flange, personally solve stainless steel flange of the veil for you. In the industry, we are a lot of lack of the application of stainless steel flange, such as in the construction industry.First, high temperature resistantBefore the flange, can very good used in the construction industry, construction industry, the use of stainless steel flange is very broad, we can at any time on site to see the shadow of the stainless steel flange. Stainless steel flange that is fully illustrated the immortal status in the architecture, is a lot of things can go beyond. Largest stainless steel flange is a bit of high temperature tolerance, can is good enough to withstand high temperatures, therefore, stainless steel flange in industry are invincible good situation.Second, widely participate in hot water systemStainless steel flange the tolerance of heat is just has been said, is very high. Therefore, the most popular in the construction industry. Stainless steel flange to the most high quality drinking water system is very appropriate, and hot water system, stainless steel flange are widely used in the hot water system, good tolerance is used as the main reason for the hot water system. Can be the best one of a pipe, water supply system is very competitive in the market.Third, health, environmental protectionIn today's society, always faces many pollution status, we emphasize on environmental protection all day, but the real to do environmental protection, we should start from the side of the small. So let the stainless steel flange on the industry market has huge competitiveness. It is also because the stainless steel flange environmentally safe, need not use there will be pollution phenomenon.The advan,مواسير شفة ...ادامه مطلب

1, chromium stainless steel stamping elbow has must be corrosion resistant (oxidizing acid, organic acids, cavitation), heat-resisting and wear-resisting function. Who used for power station equipment decoration material, chemical, oil and other Settings. Chromium stainless steel stamping elbow poor weldability, should be detailed before welding, heat treatment of speaking of choose suitable welding electrode.2, chromium nickel stainless steel stamping elbow has choiceness erosion resistance and oxidation resistance, widely used in chemical, fertilizer, oil, medicine, machinery manufacturing.3, chrome and stainless steel stamping elbow sclerosing eve, after welding cracks easily occur. If the acceptance with typical chromium stainless steel stamping elbow electrode welding, required preheat above 300 ℃ and 700 ℃ after welding at the mercy of slow cooling treatment. If cannot undertake the weldment heat treatment after welding, should choose the chromium nickel stainless steel stamping elbow.4, chromium nickel stainless steel stamping elbow, when welding the carbide precipitation by repeated heating, lower resistance to erosion and mechanical function.5, chromium nickel stainless steel stamping elbow coated with titanium calcium type and low hydrogen type. Titanium calcium type can be used for ac/dc, but when the ac welding penetration, redness easily at the same time, therefore, stainless steel stamping elbow as general acceptance of dc power supply.6, stainless steel stamping elbow manipulation should link when dry, titanium calcium type should be 1 hour after 150 ℃ drying, low hydrogen type should be 1 hour after the 200-250 ℃ drying (cannot be repeated many times to dry, otherwise the medicine skin peeling easy craze), beware of the stainless steel stamping elbow coated viscous oil and dirt, lest cause stainless steel stamping elbow add carbon content and influence welding quality of weld.7, chrome and stainless steel stamping elbow, appropriate for the,مواسير شفة ...ادامه مطلب

1, due to the heating to guard against erosion between eyes, welding current shoulds not be too eve, 20% less than carbon steel electrode mercy, arc shoulds not be too long, interlayer cold quickly, with narrow bead advisable.2, stainless steel stamping elbow sclerosing than eve after welding, convenient crack. If accepted with typical welded stainless steel stamping elbow, required preheat above 300 ℃ and 700 ℃ after welding at the mercy of slow cooling treatment. If cannot undertake the weldment heat treatment after welding, should choose stainless steel stamping elbow electrode.3, stainless steel stamping elbow for the improved corrosion resistant function and weldability and appropriate add right amount invariance element Ti, Nb and Mo, weldability is stainless steel stamping elbow is better. Acceptance with typical chromium stainless steel electrode, should be above 200 ℃ preheat and at the mercy of 800 ℃ and tempering treatment after welding. If welding cannot be heat treatment, should choose chromium nickel stainless steel electrode.4, stainless steel stamping elbow electrode has choiceness erosion resistance and oxidation resistance, widely used in chemical, fertilizer, oil, medicine, machinery manufacturing.5, stainless steel stamping elbow coated with titanium calcium type and low hydrogen type. Titanium calcium type can be used for ac/dc, but when the ac welding penetration, and red, so the general acceptance of dc power supply.6, stainless steel stamping elbow has must be corrosion resistant (oxidizing acid, organic acids, cavitation), heat-resisting and wear-resisting function. Who used for power station equipment decoration material, chemical, oil and other Settings. Stainless steel stamping elbow poor weldability, should be aware of before welding, heat treatment of speaking of choose suitable welding electrode.7, electrode manipulation should link when dry, titanium calcium type should be 1 hour after 150 ℃ drying, low hydrogen type should ,مواسير شفة ...ادامه مطلب

Stainless steel flange is a kind of used to connect two pipes connection parts, in the entire plumbing system of stainless steel flange is just a part of the connection parts. Stainless steel flange are classified into the category of the stainless steel flange parts, flange can be connection and some of the water pump, there are some very small is similar to the valve connection device can also belongs to the stainless steel flange type, the following is about the production standards and rules for everyone to do the introduction.First, the stainless steel flange thickness have requirementsBecause of the different stainless steel flange have different purposes, so for the thickness of the flange itself also has the related requirements. Pipeline pressure brought by directly determines the thickness of the flange need to use. Different thickness can withstand the pressure of the pipeline is also has a very big difference. General situation, the pressure is the thickness of the stainless steel flange and pipe size has a proportional relationship, that is powerful pressure pipe need to use the thicker the thickness of stainless steel flange.Second, stainless steel flange connection mode determines the number of thread flange portstainless steel flange and pipe can use many kinds of methods, the combination of these methods directly determines the stainless steel flange port needs with many threads. If the pipe to pressure is not so big, so that it is using the screw tued the connection, this time only need to put the two pieces are bonded good stainless steel flange and two pipes respectively through positive and negative direction of the port of screw tight, this case the number of threads is more commonly.Third, stainless steel flange gaskets need to match each other in pairsDifferent types of flange should be carried out and the corresponding gasket to match, if pipe delivery pressure is bigger, the gasket also need to choose some heavy material. In ,مواسير شفة ...ادامه مطلب

Flange manufacture is a kind of forging industry, because the forging industry is environmental pollution, such as production will emit a lot of poisonous and harmful gas, will also release a lot of dust, in some advanced countries, requirements and regulations for the production is more, as a result, such as flange production forging industry mostly focused on developing a large number of production more. But in the inteational market, the demand for flange is larger, so the flange import export become one of the "industry in the world.In export flange which on the one hand, India has bigger superiority, because India's human resources are very rich, processing the raw material of flange has very abundant, thus occupying the price is relatively cheap advantage, most of the flange on the inteational business from India. And this kind of situation, flange has brought great impact on China's export. Wenzhou city of zhejiang province in our country are mainly processing flange and accounted for seventy-five percent of domestic exports of flange in the majority. At present is affected by the Indian market, wenzhou city export flange is evident in the downward trend.At present, the flange production situation appeared two outer situation, most rely on outsourcing is a raw material, the second is the product most depend on export. In view of the above situations, now mainly introduce the problems existing in the outlet flange of solving measures should be taken.Measures above one, said the flange production and export of raw materials want to rely on outsourcing situation at present, the production of products to export situation, the local govement should timely adjust the enterprise's management patte, the structure of the assets of appropriate optimization, for example can take enterprise assets reorganization, or is the way to create a group, is the production of products in the inteational competitiveness. Then there is the firm's ability to,مواسير شفة ...ادامه مطلب

Dimension and Weight of DIN 86029 PN25 Hubbed Slip On Flange Rated Diameter O.D. of Pipe Flange Parameter Neck Size Size of R.F. Bolts Approx. Weight DN d1 D d5 b k h d3 r d4 f No. of  holes d2 KG 10 17.2 90 17.7 14 60 20 30 4 40 2 4 14 0.56 15 21.3 95 22 14 65 20 35 4 45 2 4 14 0.62 20 26.9 105 27.6 16 75 24 45 4 58 2 4 14 0.91 25 33.7 115 34.4 16 85 24 52 5 68 2 4 14 1.09 32 42.4 140 43.1 16 100 26 60 5 78 2 4 18 1.58 40 48.3 150 49 16 110 26 70 5 88 3 4 18 1.76 50 60.3 165 61.1 18 125 28 85 5 102 3 4 18 2.39 65 76.1 185 77.1 18 145 32 105 5 122 3 4 18 3.1 80 88.9 200 90.3 20 160 34 118 5 138 3 8 18 3.77 100 114.3 220 115.9 20 180 38 140 5 158 3 8 18 4.29 125 139.7 250 141.6 22 210 40 168 5 188 3 8 18 5.86 150 168.3 285 170.5 22 240 44 196 5 212 3 8 22 7.22 175 193.7 315 196.1 24 270 44 224 6 242 3 8 22 9.18 200 219.4 340 222 24 295 44 247 6 268 3 8 22 9.95 250 273 395 276 26 350 46 300 6 320 3 12 22 12.69 300 323.9 445 327 26 400 46 352 6 370 4 12 22 14.4 350 355.6 505 359 26 460 53 398 10 430 4 16 22 22.36 400 406.4 565 410 26 515 57 448 10 482 4 16 26 26.85 450 457 615 461 28 565 62 502 10 532 4 20 26 32.53 500 508 670 512 28 620 67 552 10 585 4 20 26 37.84 600 610 780 614 28 725 75 658 10 685 5 20 30 49.32 700 711 8,مواسير شفة ...ادامه مطلب