Five Types of Flange Facings and Their Characteristics

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Five Types of Flange Facings and Their Characteristics

In the domain of piping systems, flanges play a vital part in interfacing different components safely and guaranteeing leak-proof joints. One of the basic perspectives of flange design is the faceing, which alludes to the surface profile of the flange that mates with the gasket. The type of flange faceing can essentially affect the execution, fixing capacity, and unwavering quality of the association.

Flat Face

The flat face flange is one of the most fundamental and broadly utilized types of flange facings. As the title proposes, the mating surface of the flange is flat, without any raised or notched highlights. These flanges are regularly utilized in low-pressure and low-temperature applications, as they depend exclusively on the gasket to make a seal between the mating surfaces.

One of the focal points is their effortlessness and cost-effectiveness. Be that as it may, they may not give the best fixing execution in high-pressure or high-temperature situations, as the gasket can encounter over the top compression or expulsion, driving to potential leaks.

· Characteristics: these flanges have a smooth, flat surface without any raised parcels. The mating flange surface is moreover flat. flat face flanges require the utilize of full-face gaskets that cover the whole flange surface.

· Applications: flat face flanges are commonly utilized in low-pressure and non-critical applications where fixing is accomplished by compressing the gasket between the flat faces of the flanges.

Raised Face

Raised face flanges include a raised circular surface on the mating face, which juts over the flange’s external breadth. This raised surface is outlined to concentrate the jolt stack on a littler region, expanding the gasket push and making strides the fixing performance.

Raised face flanges are commonly utilized in high-pressure and high-temperature applications, as they can give a more solid seal compared to flat face flanges. In any case, it is pivotal to guarantee appropriate gasket choice and jolt fixing to anticipate intemperate compression or harm to the raised face.

· Characteristics: Raised face flanges have a little raised parcel around the bore gap. This raised face gives a fixing surface for the gasket and makes a difference to center the gasket amid get together. The raised parcel regularly ranges from 1/16 inch to 1/4 inch in height.

· Applications: Raised face flanges are broadly utilized in standard mechanical applications and are reasonable for a wide extend of weight and temperature conditions.

Female and Male Face

Female and male face flanges, also known as tongue and groove flanges, feature a complementary design where one flange has a raised circular surface (male face), and the other has a corresponding groove (female face). When mated together, the male face fits into the female face, creating a tight and secure connection.

This type of flange facing is particularly useful in applications where precise alignment is required, as the tongue and groove design helps to guide the flanges into the correct position during assembly. Female and male face flanges are often used in high-pressure and high-temperature applications, providing excellent sealing performance and resistance to leaks.

Tongue and Groove Face

Similar to the female and male face design, tongue and groove face flanges also feature a raised circular surface (tongue) on one flange and a corresponding groove on the mating flange. However, the tongue and groove design is typically more pronounced and deeper compared to the female and male face flanges.

Tongue and groove face flanges are commonly used in applications with high bending or deflection loads, as the tongue and groove design helps to distflangeute the forces more evenly and prevent excessive stress on the gasket. This type of flange facing is often found in piping systems for the chemical, petrochemical, and power generation industries.

·  Characteristics: Tongue and groove flanges have alternating ridges (tongues) and grooves machined into the flange faces. When bolted together, the ridges on one flange mate with the grooves on the other, providing alignment and preventing movement.

·  Applications: Tongue and groove flanges are used in applications where alignment and stability are critical, such as in large diameter or high-pressure piping systems.

Ring Joint Face

Ring joint face flanges are designed for high-pressure and high-temperature applications where exceptional sealing performance is required. These flanges feature a grooved circular recess on the mating surface, which accommodates a metallic ring gasket.

The metallic ring gasket is compressed between the two flanges, creating a tight and reliable seal that can withstand extreme operating conditions. Ring joint face flanges are widely used in the oil and gas industry, as well as in critical applications where the risk of leaks must be minimized.

By understanding the characteristics of different flange facings and working with experienced professionals and trusted manufacturers, you can make informed decisions and design piping systems that meet the highest standards of safety, reliability, and performance.

Flange Manufacturer

Hebei Pengrun Pipe Fittings Co., Ltd. is a renowned manufacturer of pipe fittings and flanges, with over 20 years of experience in the industry. The company offers a wide range of flange products, including various types of flange facings, to meet the diverse needs of different industries.

When selecting the appropriate flange facing, it is crucial to consider factors such as operating pressure, temperature, fluid characteristics, and gasket compatibility. Each type of flange facing offers unique advantages and limitations, and choosing the right option can ensure the safe and efficient operation of your piping system while minimizing the risk of leaks, failures, and potential hazards.

If you are in search of a reliable flange supplier, Hebei Pengrun Pipe Fittings Co., Ltd. is a trusted choice. You can contact them at for inquiries, quotations, or further information about their products and services.


1. ASME B16.5: Pipe Flanges and Flanged Fittings (American Society of Mechanical Engineers)

2. EN 1092: Flanges and their joints (European Standard)

3. “Piping Handbook” by Mohinder L. Nayyar (McGraw-Hill Education)

4. “Pipe Flanges and Flanged Fittings” by John H. Bickford (Marcel Dekker, Inc.)

5. “Piping Systems Manual” by Brian Silowash (McGraw-Hill Education)

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Lucy yang

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