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Flanges Classification

2017/3/30 15:47:14      Click:

Flange is the most commonly used pipe fitting in project. Following is the main flange classification summed up by Henan Lanphan.

Flat type flanges

Advantages: Easy manufactured, lower cost, widely used.

Disadvantages: Stiffness is not good, sealing face has flat and convexity.

Flat welded flanges

Advantages: Easy installation.

Disadvantage: Weld neck is short, stiffness is better than flat flange, but cost is more than flat flange. But hard to weld, cost more welding rod.

Welding neck flanges

There are RF, FM, M,T, G and FF face.

Advantages: sealing is better than others, most used for high temperature and pressure pipes and gas, oil medium.

Disadvantages: Dimension and weight is large, price is much higher, hard to install.

Integral flanges

Integral flange is one of connection type. It is also belong to weld neck flanges. Material is carbon steel, stainless steel, ductile iron etc. It is used for higher pressure pipeline.

Socket flanges

Socket flanges is one side weld with pipe, the other side connected by bolts and nuts.

Sealing: RF, MFM, TG, RJ.

Application: Pressure vessel, oil, chemical, pharmacy, metallurgy, machinery, etc..

Screw flanges

Screw flanges inner are screw type, and connected with screw pipe. Needn't welding when installation.

Advantages: Easy to install and repair.

Disadvantages: Only can be used for -45℃ to 260℃.

Blind flanges

Also called flange cover, blind. It is used for block pipe or valve.

Sealing face: FF, RF, MFM, TG, RJ.