What is an anchor flange and how to use it

An anchor flange is a device to restrain pipe movement in a piping system.Anchor flange is an important supporting member of large diameter,high pressure and long distance gas or oil pipeline.It is mainly welded on the gas (oil) pipeline,fixed with cement piers,and partially or completely buried underground.Anchor flange looks like weld neck flange with shape but has two hubs on the both sides to weld with the pipes,but there is no bolt bores on the anchor flanges.And the weight can be estimated according to two weld neck flanges of the same size.

Schematic of anchor flange used in pipeline

In places with low pressure,short pipes can be used instead.For connections of fixed pipes without maintenance for life or required burial underground and require high pressure, conventional flanges cannot ensure safe and reliable work of high-pressure pipes.Anchor flange is a kind of axisymmetric ring body with flange. The two sides of the flange are symmetrical flange necks. The ends of the two flange necks are respectively welded with the pipe ends and embedded in the anchor pile. The two flanges connected by bolts are combined with the existing technology, the sealing gasket is cancelled, and an integral flange is made, which is connected with the gas transmission pipeline by welding, and fixed by its flange and flange body and anchor pile, so that it can be used to fix the connection of pipelines.

Anchor Flanges Finished in Haihao Group

Application of a anchor flange:

As we know,the steel piping system could move and shake when the liquid flowing through the pipe,especially when the piping system is turning in some places,the liquid will push the turning in the direction of liquids flowing.Another application of the anchor flange,there may bring expansion movements when temperature is changing in the piping system.Then an anchor flange is installed to combat the axial movement in the pipeline.The anchor flange is commonly secured into a concrete foundation.Besides preventing the axial movement,the anchor flange is also installed when the pipeline crossing from a bridge or river.Among this large distance,the pipe with huge liquid has the tendency to sag,if we use the anchor flange on the both sections of the pipeline,it will secure the position of the pipe.It is suitable for the West-to-East Gas Transmission Project in China and the fixed connection of many line valve Chambers.

Haihao Flange Factory manufacture flanges products more than 30 years and our products sell well all over the world.If you want to know more about our products,please feel free to contact us email:sales@haihaogroup.com