12 Varieties of Flanges - Manufacturers of Hex Flange Bolts and Nuts in China

Flanges, also known as flange convex discs or simply convex discs, are disc-shaped components typically used in pairs and are commonly encountered by individuals involved in mechanical or engineering installations. 

Flanges serve primarily as connectors between pipes and valves, pipes and other pipes, or between pipes and equipment. They facilitate connections and provide sealing functions, making them essential for construction projects. When two surfaces are joined together using bolts with sealing properties, they are called flanges. Are you familiar with the 12 common types of flanges? 

Plate-type flat welding flange.

Plate flat weld flanges are prevalent. They are both straightforward to produce and cost-effective, making them popular among many users. However, one drawback of plate-type flat weld flanges is their limited rigidity, rendering them unsuitable for applications requiring elevated heights. 

Flat welding flange with neck

Flat-weld flanges with necks are also quite common. The installation and manufacturing processes are relatively straightforward. However, flat-weld flanges with necks may not withstand high temperature and pressure fluctuations. 

Neck butt welding flange

Neck butt weld flanges are typically employed in pipelines subject to significant temperature or pressure fluctuations, as well as in high-temperature, high-pressure, and low-temperature pipelines, primarily due to their superior sealing capability. 

Integral flange

Integral flange is a prevalent flange connection method. Strictly speaking, it constitutes a type of necked butt-welded steel pipe flange. 

Socket Weld Flanges

Socket welding flanges are welded to a steel pipe at one end and bolted at the other. Renowned for their exceptional performance, they find extensive applications across various industries, including petroleum, chemical, shipbuilding, pharmaceutical, metallurgy, machinery, and food. 

Threaded flange

A threaded flange, as the name implies, features threading and is a type of non-welded flange. 

Butt welding ring loose flange

A loose ring butt-welding flange is a movable flange typically employed in water supply and drainage fixtures. 

Flat welding ring loose flange

The flat welding ring loose flange, similar to the butt-welding ring loose flange, is a movable flange that can be directly bolted to pipelines and equipment in project installations. 

Flange cover.

A flange cover is a type of flange that lacks a central hole and is primarily utilized for sealing pipe plugs. It's noteworthy that both the flange and screw cap can be removed easily at any time. 

Lining flange cover

A lining flange cover involves applying stainless-steel surfacing on the side adjacent to the medium. This material shields the pipeline from corrosive mediums due to its anti-corrosion lining. 

American Standard Neck Welding Flange

The necked flat weld flange is a component used to connect pipes. It features holes through which bolts can be passed to securely join the two flanges.

American standard butt-welding flange

American standard flanges are components used for pipe connections, linking pipe ends together. 

Conclusion

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