Welded neck flange, also known as a high neck flange, is a long and inclined high neck from the welding point between the flange and the pipe to the flange plate. The wall thickness of this high neck gradually transitions to the pipe wall thickness along the height direction, improving the discontinuity of stress and thus increasing the strength of the flange.Welded neck flanges are mainly used in situations where construction conditions are relatively harsh, such as situations where the flange is subjected to significant stress or repeated stress changes due to pipeline thermal expansion or other loads; Alternatively, it could be pipelines with significant fluctuations in pressure and temperature, or pipelines with high temperatures, high pressures, and sub zero temperatures.
The advantages of a welded neck flange are that it is not easily deformed, has good sealing, and is widely used. It has corresponding rigidity and elasticity requirements and reasonable welding thinning transition. The distance between the welding junction and the joint surface is large, and the joint surface is free from welding temperature deformation. It adopts a relatively complex bell shaped structure, suitable for pipelines with significant pressure or temperature fluctuations or pipelines with high, high, and low temperatures. It is generally used for the connection of pipelines and valves with PN greater than 2.5MPa; It can also be used on pipelines that transport expensive, flammable and explosive media.
Anchor flange, as an axisymmetric circular body with a flange, has symmetrical flange necks on both sides of the flange. It combines two welded flanges that appear to be bolted together, eliminates sealing gaskets, and is made into an integral forged steel flange. It is connected to oil and gas pipelines through welding, and is fixed with anchor piles by its flange and flange body, which can be used for the connection of fixed pipelines and is suitable for the fixed connection of many process stations, line valve chambers.
Anchor flange is an engineering component that can be replaced by short pipes with thrust rings or wall sleeves in places with low pressure. For the connection of fixed pipelines that require burial underground or lifelong maintenance, and when the pressure is high, conventional flanges are used, which cannot ensure the safe and reliable operation of high-pressure pipelines.
Post time: Apr-06-2023
