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Talking about the welding technology of neck flange

  • Time of issue:2021-08-13

Talking about the welding technology of neck flange

(Summary description)　　

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 withstand high temperature and high pressure, repeated bending and temperature fluctuations, but the on-site device is more convenient, and the process of welding seam scratching can be omitted, which is more popular. Butt welding flange with neck: neck flange welding is usually called "high hub" 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 value. However, the price is relatively high because of the complicated production process of the product. Threaded (threaded) flange: The threaded flange is connected by threaded fasteners. But the center of the product 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 strength inside and outside the welding to avoid leakage. Sliding flanges are matched with boring pipes with slightly larger outer diameters. They are better than neck flange welding due to lower initial cost.

flange

Many users, but the cost of the latter device will not be low, due to the increase in the number of 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 flange 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 will assemble the system.

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 pipe allows the pipe to be inserted into a sliding flange similar to 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 stays at the bottom as a shoulder sleeve designed for pipes. This eliminates any flow restrictions when using socket welding flanges.

  • Time of issue:2021-08-13
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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 withstand high temperature and high pressure, repeated bending and temperature fluctuations, but the on-site device is more convenient, and the process of welding seam scratching can be omitted, which is more popular. Butt welding flange with neck: neck flange welding is usually called "high hub" 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 value. However, the price is relatively high because of the complicated production process of the product. Threaded (threaded) flange: The threaded flange is connected by threaded fasteners. But the center of the product 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 strength inside and outside the welding to avoid leakage. Sliding flanges are matched with boring pipes with slightly larger outer diameters. They are better than neck flange welding due to lower initial cost.

flange

Many users, but the cost of the latter device will not be low, due to the increase in the number of 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 flange 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 will assemble the system.

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 pipe allows the pipe to be inserted into a sliding flange similar to 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 stays at the bottom as a shoulder sleeve designed for pipes. This eliminates any flow restrictions when using socket welding flanges.

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Talking about the welding technology of neck flange [ 2021-08-13 ]
　　 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 withstand high temperature and high pressure, repeated bending and temperature fluctuations, but the on-site device is more convenient, and the process of welding seam scratching can be omitted, which is more popular. Butt welding flange with neck: neck flange welding is usually called "high hub" 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 value. However, the price is relatively high because of the complicated production process of the product. Threaded (threaded) flange: The threaded flange is connected by threaded fasteners. But the center of the product 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 strength inside and outside the welding to avoid leakage. Sliding flanges are matched with boring pipes with slightly larger outer diameters. They are better than neck flange welding due to lower initial cost. flange Many users, but the cost of the latter device will not be low, due to the increase in the number of 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 flange 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 will assemble the system. 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 pipe allows the pipe to be inserted into a sliding flange similar to 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 stays at the bottom as a shoulder sleeve designed for pipes. This eliminates any flow restrictions when using socket welding flanges.
Advantages of flat welding flange [ 2021-08-13 ]
　　1. In order to compact the sealing surface of the flat welding flange, only a small 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 welding flange product with a relatively small volume and a relatively light weight. 　　 2. The production of flat 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 can 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 has 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 replaced by a sealing ring to ensure an outstanding matching of the flat welded flange seal facing the sealing surface. 　　 flat welding flange 　　 But it also has some disadvantages: 　　 Disadvantages of flat welding flange: 　　The main design disadvantage of flat welded 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 fluctuating cyclic loads will cause movement between the flange surfaces, which will affect the function of the flange, which will damage the integrity of the flange and eventually lead to leakage. It is impossible for any product to be without shortcomings, just try to control the lack of products to the minimum, so the company tries to perfect the functions of the products when producing flat welded flanges to make them play the greatest role.
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