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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-bearing capacity of the flange. Compared with ₹the butt-welded flange, the welding workload is large, §the electrode consumption is high, and it cannot wit☆hstand high temperature and high pressure, repeated bending and temperat↕ure fluctuations, but the on-site device is more convenient, and the process↔ of welding seam scratching can be omitted, which is more popular. Butt w¥elding flange with neck: neck flange welding is usually called "high hub"β flange. Its purpose is to transfer the pressure of the pipeline, thereby reducing th‌e high stress concentration in the flange base. Neck flange welding is a good design for ↕butt welding those flanges that are provided due to their own constructive va♥lue. However, the price is relatively high because of the complicated production process of the $product. Threaded (threaded) flange: The threaded flange i s connected by threaded fasteners. But the center of the pr€oduct has a thread size corresponding to the pipe. Its main adva‌ntage is that it can be assembled without welding. ≥Sliding flange: Sliding flange has a lower hub, because "the pipe enters the single flange before welding. This is to provide sufficient stφrength inside and outside the welding to avoid leakage. Sliding fla nges are matched with boring pipes with slightly lπarger outer diameters. They are better than neck flange welding due to lower initial c>ost. flange Many users, but the cost of the latter de☆vice will not be low, due to the increase in the number o★f weld neck flanges, lap flange: in practice, the lap flange ₩is the same complete sliding flange, unless it is in the hole and A radius between fl>ange races. It is necessary for the radius to have the flange to contain the lap× stub to complete. Usually, the lap flange and the lap stub end mating together w©ill assemble the system. The socket welding flange is a ↔similar sliding flange, unless it has a hole and aγ counter hole size. The matching of the counter hole and the ★pipe allows the pipe to be inserted into a sliding flange similar to the flange. The diameter of βthe smaller hole is matched with the same pipe with the same ID. The restriction ¶is a built-in hole that stays at the bottom as a shoulder sleeve designed for pipe♦s. 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 s£mall pressure is required. As the required pressure drops, the size of the bo‍lts and the number required are correspondingly reduced. After all, a plan is planned. A flat weldi♣ng flange product with a relatively small volume and a relatively light weiΩght. 　　 2. The production of flat welded flanges •can save data and reduce costs. When the raw material of the pi♣pe is special and the price is high, the cost of welding the flange of the same raw mater→ial will be high, and the use of this flange can effectively s↕ave 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 iσs very suitable.         3. The flat welding flange can save space and reduce w♣eight in the process of use. The most important thing iφs to ensure that the head part will not leak. It h₽as a very outstanding sealing function. The reason why the size of the compact flange is reduced i‍s because The diameter of the seal is reduced, which will£ reduce the cross-section of the sealing surface. Also, the flange gasket has now been repαlaced by a sealing ring to ensure an outstanding match↔ing of the flat welded flange seal facing the sealin¶g surface. 　　 flat welding flange 　　 But it also has some disadvantages: 　　 Dis§advantages of flat welding flange: 　　The main design disadvantage of flat weldedσ flanges is that it cannot ensure no leakage. This∑ is the lack of its planning: the connection is dynamic, and for example, thermal expansion and fl♣uctuating cyclic loads will cause movement between the fl®ange surfaces, which will affect the function of the flange, which w÷ill damage the integrity of the flange and eventual®ly lead to leakage. It is impossible for any product to be without shortco≤mings, just try to control the lack of products to the minimum, so the company tries πto perfect the functions of the products when producing flat welded flanges to make the∏m 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 char✘acteristics: 　　 1. A self-control butterfly valve that can be remotely controlled, wh<ich 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 energy of the butterfly valve, with a wide range of power sources,↑ wide application range, saving human resources, and having work efficie ncy; 　　3. Convenient operation and easy to meet various control requirements. It can be reali‍zed by selecting different actuators, signal feedback, floσw adjustment, explosion-proof and other functions; &　　4. Ultra-miniaturization can be realized, mechanical se↕lf-locking can be realized, and different sealing rings can be changed to meet different worki>ng conditions. 　　The working principle of flange: 　　Using the actuator to  input a standard signal of 0-10 mA, the motor grou✔p 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 the resistance of the medium flowing through the v♦alve body, so the pressure drop generated by the valve is small, so it has  better flow control characteristics. 　　Butterfly valve has two sealing type☆s: elastic seal and metal seal. For elastic sealing valves, the ≥sealing ring can be embedded on the valve body or attλached to the periphery of the butterfly plate. The va∏lve with metal seal generally has a longer life than the valve with elastic seal, but it iσs difficult to achieve a complete seal. Metal seals can adapt to higher operati✔ng temperatures, while elastic seals have the defect of temperature limitation.  If flanged butterfly valves are required to be used as flow control, the mai♥n thing is to correctly select 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 flow, pr"essure, and direction of the fluid. The fluid to be ₹controlled can be liquid, gas, gas-liquid mixture or solid-liquid mixture.♦   one. Basic parameters of valve 　　The basic paΩrameters of the valve include working pressure (PN), wo rking temperature (T) and nominal diameter (DN). For various valves equipped on pi•pelines, nominal pressure and nominal diameter are commonly used as basiβc parameters. Nominal pressure refers to the maximum working pressure that a valve ofδ 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 and the pipeline. Valves, pipelines and pipe→line accessories of the same nominal diameter can be connected to  each other, which is interchangeable.   two. Valve classification 　　 1. Accordin↓g to function and purpose 　　 According to the different f‌unctions of the valve, it can be divided into the fo±llowing five types: 　　①Shutoff valve 　　 shut-off valve is also  called closed-circuit valve, its function is to connect or cut off the medium in the pipeline.♣ Block valves include gate valves, globe valves, plu§g valves, ball valves, butterfly valves, and diaphragm valves. 　　②Check ∞valve 　　 Check valve is also called one-way valve or check valve, its function is to pre∞vent the back flow of the medium in the pipeline. Fo♠r example, the suction valve of the water pump belongs to the non-return valve category. 　　③Safet£y valve 　　 The role of safety valves is to prevent the p↓ressure of the medium in the pipeline or device from exc§eeding the specified value to protect the safe operation of subsequent equipment. 　　④Regulati≠ng valve 　　The function of the regulating valve is to regulate th×e pressure, flow and other parameters of the medium. The r↑egulating valve has different classification methods. According to the purpose and φfunction, the regulating valve can be divided into: 　　 (1) Two-position valve. The twoσ-position valve is mainly used to close or connect the medium. 　　 (2) Regulating valφve. The regulating valve is mainly used for regulating the coefficient. When selecting the βvalve, the flow characteristics of the regulating valve need to be determined; the regulat↔ing valve can be divided into the following forms according to the structure: single-seat regula₽ting valve; double-seat regulating valve; sleeve regulating valv≠e; angle regulating Valve; three-way regulating valve; diaphragm valve; butterfly v∑alve; ball valve; eccentric rotary valve. 　　 (3) Shut-off valv↕e. Usually refers to a valve with a leakage rate of less than one part in 100,000. 　　⑤♥Divert valve 　　 The diverter valve includes various distribution valves and flow valves, etc.±, whose function is to distribute, separate or mix the medium in the pipeline. 　　♠2. According to the valve drive mode 　　According to t<he valve drive mode, it can be divided into the following three types: 　　①&Automatic valve 　　 refers to valves that do not require external driv∑e, but rely on the energy of the medium to actuate the Ωvalve, such as safety valves, pressure reducing valve s, traps, check valves, automatic control 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 compr♣essed air, hydraulic valves driven by hydraulic pressure such as oil, and combination€s of various driving methods, such as pneumatic-electric‌ valves. 　　③Manual valve 　　Manual valves use handwheels, handles, levδers, sprockets and other components to manipulate the valve action b↓y manpower. When the valve closing torque is large, a gear or turbo reduc$er can be set between the handwheel and the valve stem. If n↑ecessary, universal joints and drive shafts can also be used for long-distance operat ion. 　　3. Press the connection method 　　 can be divided into the following six types a ccording to the connection method: 　　①Threaded connection πvalve: The valve body has an internal thread or an external thread to connect with the↔ pipe thread; 　　②Flange connection valve: the valve body has a fσlange to connect with the pipeline flange; 　　③Welding connection  valve: The valve body has a welding groove and is welded to the pipeline; 　"　④Clamp-connected valve: the valve body has a clamp to connect wit>h the pipe clamp; 　　⑤ Card sleeve connection valve: It is ÷connected with the pipeline by a card sleeve; 　　⑥Wafer con→nection valve: a connection form in which the valve and the two pipes are directly clamped εtogether with bolts. 　　4. According to the valve body material∞ 　　①Metal material valve 　　The valve body and other parts are £made of metal materials, such as cast iron valves, carbon steel valves, all€oy steel valves, copper alloy valves, aluminum alloy valves, lead alloy valves, titΩanium alloy valves, Monel alloy valves, etc. 　　②Non-metallic valve 　　The va©lve 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 calipe≠r. 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 pa☆ds clamp the brake disc, the kinetic energy can be convert↓ed into heat energy. The brake system is a vital system in a car. The brake system is related &to the driving stability and driving safety factor of the car. The key components of the brakeγ system include vacuum booster pump, brake master cylinder, brake cy₽linder, brake pads, and brake discs. Brake pads and brake discs a÷re basically wearing parts that need to be replace™d on a regular basis. As the driving distance of the car increases, the brake paπds and brake discs will basically continue to wear. After the brake pads and brake discs are wor☆n to a certain 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 master cylinder can push the brake cylinder through the bra&ke fluid. At this time, the brake cylinder can push the brake pads to cl‍amp the brake disc. The vacuum booster pump provides power as✔sistance, and the vacuum booster pump allows the driv★er to easily step on the brake pedal. The brake fluid in the brake system∑ needs to be replaced regularly. If it is not replaced f±or a long time, it will affect the braking force and braking distance. Brake flαuid is a kind of fluid that is easier to absorb water. When the water content of th™e brake fluid reaches 3%, it needs to be replaced. After replacing t≥he brake fluid, the air in the brake system pipeline needs to be empti→ed, otherwise the braking force and braking distance may ☆also be affected.
release time : 2021-08-13
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