Key Information About Pipe Flanges Manufacturers of OEM flange pipe fittings.

Pipe flanges, gaskets, and fasteners collectively form flange joints. These components are integral to engineering design, essential elements in piping systems, pipe fittings, valves, and various equipment parts (such as manholes and sight glasses). Moreover, flange joints find widespread application across diverse disciplines, including industrial furnaces, thermal engineering, water supply and drainage, heating and ventilation, and automatic control systems.

Classification of flanges

50. According to chemical industry standards, flanges are:

Plate type flat welding flange (PL), flat welding flange with neck (SO), welding neck flange (WN), integral flange (IF), socket welding flange (SW), threaded flange (TH), butt welding ring loose flange (PJ/SE), flange blind (BL), flat welding ring loose flange (PJ/PJ), lined flange blind (BL (S)).

50. According to the petrochemical (SH) industry standard, flanges are categorized into:

Threaded flange (PL), welding neck flange (WN), flat welding flange (SO), socket welding flange (SW), lap joint flange (LJ), flange blind (not specified).

50. According to the machinery (JB) industry standard, flanges are categorized into:

Integral flange, butt welding flange, plate type flat welding flange, butt welding ring loose flange, flat welding ring loose flange, welding neck ring loose flange, flange blind.

50. According to national (GB) standards, flanges are categorized into:

Integral flange, threaded flange, butt welding flange, welding neck flange, socket welding flange, butt welding ring loose flange, plate type flat welding flange, butt welding ring plate loose flange, flat welding ring plate loose flange, welding neck ring loose flange, flange blind.

50. Flanges are categorized according to the type of flange connection as follows:

Plate type flat welding flange, welding neck flange, butt welding flange, socket welding flange, threaded flange, flange blind, lap joint flange, loose flange with butt welding ring, loose flange with flat welding ring, flange with ring groove surface, large diameter flat flange, large diameter high neck flange, spectacle blind plate, etc.

50. Based on the connected parts, flanges can be categorized into container and pipe flanges.

50. According to the structural type, there are integral flanges, threaded flanges, flat welding flanges, butt welding flanges, lap joint flanges, and flange blinds.

Form of flange connection

Flange joint: A flange connection is a detachable connection that comprises flanges, a gasket, and several bolts and nuts.

Principle: The gasket is positioned between the two flange sealing faces. Upon tightening the nut, the gasket's surface undergoes specific pressure, causing deformation and filling the uneven areas on the sealing face to ensure a tight connection.

Performance: Flange connections are widely utilized because they possess strong strength and sealing capabilities, a simple structure, low cost, and the ability to be repeatedly disassembled.

Failure mode: The primary issue is typically leakage, with the amount of leakage controlled within the allowable range for the process and environment.

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