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Talking about the welding technology of neck flange

Talking about the welding technology of neck flange

　　 The neck height of the neck flange is low, which can improve the rigidity and load-beaγring capacity of the flange. Compared with the butt-welded flange, the w✘elding workload is large, the electrode consumption is high, and it cannot with‍stand high temperature and high pressure, repeated bending and temperature fluctuations, but t&he on-site device is more convenient, and the process of welding seam scra§tching can be omitted, which is more popular. Butt welding flange with neck: neck flang≥e welding is usually called "high hub" flange. Its purpos→e is to transfer the pressure of the pipeline, thereby reducing the high stress concentr∑ation in the flange base. Neck flange welding is a good design for butt welding those flanges αthat are provided due to their own constructive value. However, the price is relatδively high because of the complicated production process oΩf the product. Threaded (threaded) flange: The threaded flange is connected by thr↑eaded fasteners. But the center of the product has a thread size corresponding to the pi"pe. Its main advantage is that it can be assembled without welding. Sliding fl§ange: Sliding flange has a lower hub, because the pipe enters the sin★gle flange before welding. This is to provide sufficient strength inside γand outside the welding to avoid leakage. Sliding flanges are matche≈d with boring pipes with slightly larger outer diameters. They are better than ne₹ck flange welding due to lower initial cost. flange Many users, but the cost of the latter devic e will not be low, due to the increase in the numb♦er of weld neck flanges, lap flange: in practice, the lap fla≤nge is the same complete sliding flange, unless it is in the hole and A radius between flange races∏. It is necessary for the radius to have the flange to contain the lap stub to complete. Usually, t♥he lap flange and the lap stub end mating together will assemble the systemπ. The socket welding flange is a similar sliding flange, unless it has a hole≠ and a counter hole size. The matching of the counter hole and the pip÷e allows the pipe to be inserted into a sliding flange similar t o the flange. The diameter of the smaller hole is matched with the same pipe with ♠the same ID. The restriction is a built-in hole that sσtays at the bottom as a shoulder sleeve designed for pi≤pes. This eliminates any flow restrictions when using socket welding flanges.
release time : 2021-08-13
Advantages of flat welding flange

Advantages of flat welding flange

　　1. In order to compact the sealing surface of the flat welding flange, only a↕ small pressure is required. As the required press¶ure drops, the size of the bolts and the number required are correspondingly reduce♥d. After all, a plan is planned. A flat welding flange product with a← relatively small volume and a relatively light weight. 　　 2. The production of flaαt welded flanges can save data and reduce costs. When the raw material of the pipe≤ is special and the price is high, the cost of welding the flange of the same raw ✔material will be high, and the use of this flange ca↓n effectively save the cost of materials. Conducive to construction, when connecting, the∑ bolt holes of the flange are inconvenient to align or to avoid replacing the flange bolt∑ holes of the equipment, etc., the use of this flat welded flange is very suitable.         3.≈ The flat welding flange can save space and reduce weight in the process of use. The most important× thing is to ensure that the head part will not leak. It Ωhas a very outstanding sealing function. The reason why the size of the compact flan‍ge is reduced is because The diameter of the seal is redu©ced, which will reduce the cross-section of the sealing surface. Also, the‌ flange gasket has now been replaced by a sealing ring to ensure an outsta★nding matching of the flat welded flange seal facing the sealing surf★ace. 　　 flat welding flange 　　 But it also has some disadvantages: 　　 Disadvantages of flat welσding flange: 　　The main design disadvantage of flat welded flanges is that it cannot ensurσe no leakage. This is the lack of its planning: the connec✔tion is dynamic, and for example, thermal expansion and fluctuating cyclic loads will εcause movement between the flange surfaces, which will affect the function of theα flange, which will damage the integrity of the flange and eventually lead to leakage. It is imposs'ible for any product to be without shortcomings, ju¶st try to control the lack of products to the minimum, so the comp♣any tries to perfect the functions of the products when producing flat welded flanges to make t hem play the greatest role.
release time : 2021-08-13
The principle and characteristics of the use of flanges

The principle and characteristics of the use of flanges

      Flange work characteristics: 　　Flange work characteristics: 　　 1. A s♦elf-control butterfly valve that can be remotely controlled, which also has the characteri‍stics of a flanged butterfly valve, and can be equipped÷ with a wide range of butterfly valves; 　　2. The power supply is the driving e nergy of the butterfly valve, with a wide range of power sources, w>ide application range, saving human resources, and having work efficiency; 　　3. Conven≠ient operation and easy to meet various control requireme↔nts. It can be realized by selecting different actuators, signal feedback, flow adjustment, explosiβon-proof and other functions; 　　4. Ultra-miniaturization can be realized, mechanical self-locking₹ can be realized, and different sealing rings can bεe changed to meet different working conditions. 　　The workiσng principle of flange: 　　Using the actuator to input a standard signal✔ of 0-10 mA, the motor group drives the gear, worm, and torque to drive the disc  to rotate. When the valve is in the fully open position, the thickness of the butterfly plate is εthe resistance of the medium flowing through the valve body, so the pressure₹ drop generated by the valve is small, so it has better flow con trol characteristics. 　　Butterfly valve has two sealing types: e lastic seal and metal seal. For elastic sealing valves, the sealing rinσg can be embedded on the valve body or attached to ≥the periphery of the butterfly plate. The valve with ₽metal seal generally has a longer life than the valve wi∏th elastic seal, but it is difficult to achieve a complete seal↓. Metal seals can adapt to higher operating temperatures, whil←e elastic seals have the defect of temperature limitation. If flanged butterfly valves are req≈uired to be used as flow control, the main thing is to correctly se lect the size and type of the valve.
release time : 2021-08-13
The role and use of the valve

The role and use of the valve

　The valve is an accessory of the pipeline, used to control the fl≠ow, pressure, and direction of the fluid. The fluid to be controlled can be liquid, ga≥s, gas-liquid mixture or solid-liquid mixture.   one. Basic parameters of valve 　　The basic par↔ameters of the valve include working pressure (PN), working temperature (T) and nominal diame≠ter (DN). For various valves equipped on pipelines, nominal pressure and nominal diameter a↔re commonly used as basic parameters. Nominal pressure refers to the maximum working pressure thatγ a valve of a certain material can withstand at a specified temperature. The •nominal diameter refers to the nominal inner diameter of the connecting end of the valve body an d the pipeline. Valves, pipelines and pipeline accessories↕ of the same nominal diameter can be connected to each other, which is €interchangeable.   two. Valve classification 　　 1. According to function and pu↑rpose 　　 According to the different functions of the valve, it can be divided in∞to the following five types: 　　①Shutoff valve 　　 shut-off valve is also called closed-c→ircuit valve, its function is to connect or cut of¥f the medium in the pipeline. Block valves include gate valves, globe val₽ves, plug valves, ball valves, butterfly valves, and diaphragm va±lves. 　　②Check valve 　　 Check valve is also called one-way valve or chec≥k valve, its function is to prevent the back flow of the medium in the pipeline. For example, the γsuction valve of the water pump belongs to the non-return valve category. 　　③Safety ‍valve 　　 The role of safety valves is to prevent the ✔pressure of the medium in the pipeline or device from excee☆ding the specified value to protect the safe operation of subsequ★ent equipment. 　　④Regulating valve 　　The function of the regula☆ting valve is to regulate the pressure, flow and other parameters of the medium. The ±regulating valve has different classification methods. According to the purpose and function, the  regulating valve can be divided into: 　　 (1) Two-position∞ valve. The two-position valve is mainly used to close or connect the medium≠. 　　 (2) Regulating valve. The regulating valve is ↕mainly used for regulating the coefficient. When selecting the valve, the flow characteristi•cs of the regulating valve need to be determined; the regulating valve can be divided i€nto the following forms according to the structure: single-seat regulating valve; ≤double-seat regulating valve; sleeve regulating va₽lve; angle regulating Valve; three-way regulating valve; diaphragm v≥alve; butterfly valve; ball valve; eccentric rotary valve. 　　& (3) Shut-off valve. Usually refers to a valve with a leaka•ge rate of less than one part in 100,000. 　　⑤Divert valve 　　 The diverter v✘alve includes various distribution valves and flow valves, etc., whose function ∞is to distribute, separate or mix the medium in the pipeαline. 　　2. According to the valve drive mode 　　According to the vβalve drive mode, it can be divided into the following three ty✔pes: 　　①Automatic valve 　　 refers to valves that do not require external drive, but rely on t∏he energy of the medium to actuate the valve, such as safety valves,  pressure reducing valves, traps, check valves, automatic contδrol valves, etc. 　　②Power driven valve 　　The power-driven valve can be driven by various powe<r sources. Including electric valves driven by electricity, pneumatic valv‌es driven by compressed air, hydraulic valves driven by hydraulic pressure such as oil, and co≥mbinations of various driving methods, such as pneumatic-electric valves. 　δ　③Manual valve 　　Manual valves use handwheels, handles, leve↔rs, sprockets and other components to manipulate the valve action by manpower. When the valve c✘losing torque is large, a gear or turbo reducer can be set between the handwhεeel and the valve stem. If necessary, universal joints and drive shafts can also beα used for long-distance operation. 　　3. Press the connectionλ method 　　 can be divided into the following six types according to the connection m‍ethod: 　　①Threaded connection valve: The valve body has an internal thread or an external threa♥d to connect with the pipe thread; 　　②Flange connection valve: the¥ valve body has a flange to connect with the pipeline flange; 　　③™Welding connection valve: The valve body has a welding groove and is welded to the pipeline; 　　Ω④Clamp-connected valve: the valve body has a clamp to connect with the" pipe clamp; 　　⑤ Card sleeve connection valve: It is conλnected with the pipeline by a card sleeve; 　　⑥Wafer conne←ction valve: a connection form in which the valve and the two pipes are directly  clamped together with bolts. 　　4. According to the valve body material 　　①✘Metal material valve 　　The valve body and other parts are made <of metal materials, such as cast iron valves, carbon steel valves, aΩlloy steel valves, copper alloy valves, aluminum alloy valves, lea×d alloy valves, titanium alloy valves, Monel alloy valves, etc. 　　②Non-metallic valve 　×　The valve body and other parts are m
release time : 2021-08-13
What is the role of calipers

What is the role of calipers

The caliper can also be called a brake cylinder. There are a£ lot of pistons inside the caliper. The function of the caliper is to push the ≤brake pads to clamp the brake disc, so that the car can slow down. After the brake pads clamp theσ brake disc, the kinetic energy can be converted into heat energy. The brake system is a vital s↔ystem in a car. The brake system is related to the drivin♣g stability and driving safety factor of the car. The key components of the brake syste←m include vacuum booster pump, brake master cylinder, brake cylinder, brake pads, a€nd brake discs. Brake pads and brake discs are basically w≥earing parts that need to be replaced on a regular basisγ. As the driving distance of the car increases, the brake pads and brake discs will basically con¶tinue to wear. After the brake pads and brake discs are worn to a certa•in degree, they need to be replaced. If they are not replaced, the≈ braking distance will be affected. After the driver steps on the brake pedal, the m☆aster cylinder can push the brake cylinder through th↓e brake fluid. At this time, the brake cylinder can push the brake pads to clamp the brake dis∑c. The vacuum booster pump provides power assistance, and the vacuum booster pump allows the d♥river to easily step on the brake pedal. The brake fluid in the brake sys↓tem needs to be replaced regularly. If it is not replaced foαr a long time, it will affect the braking force and braking distance. Brake fl‍uid is a kind of fluid that is easier to absorb water. When λthe water content of the brake fluid reaches 3%, it needs to be replaced. After repl∞acing the brake fluid, the air in the brake system pipeline needs to ☆be emptied, otherwise the braking force and braking distance may also be aff±ected.
release time : 2021-08-13
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