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What is a Socket Weld Flange? Types, Dimension and Uses

Socket Weld Flange

A socket weld flange is an essential component in many industrial applications. It connects pipes and other external parts to form one cohesive unit. Socket weld flanges are known for their strength and durability, and they offer a number of different benefits that make them especially useful in certain scenarios. Let’s look closely at socket weld flanges and explore the available types.

What is a Socket Weld Flange?

A socket weld flange is a type of pipe fitting that is used to connect pipes together. This specialized fitting creates a strong and reliable connection between two pipes, typically made from materials such as stainless steel or carbon steel. There are many benefits to using a socket weld flange instead of more traditional threaded connections, including an improved leak-resistant seal and secure connection without the need for excessive tightening. Socket weld flanges can be found in industrial piping systems across every industry, due to their rugged construction and durable materials which make them particularly suitable for rough service environments.

Socket Weld Flanges Uses

Socket weld flanges are most often used when there is a need to securely fasten two pieces of pipe together or when an object needs to be connected to another item with tight tolerances. They can also be used as joint connectors, allowing two pieces of equipment to bolster together easily. In general, socket weld flanges are used in applications where space constraints are an issue, and the connection needs to be strong enough to withstand high temperatures.

Socket Weld Flanges Types

Several types of socket weld flanges are available for use in industrial settings. The standard socket weld flange is the most common type, which consists of four components: the bolt hole, the hub, the gasket groove, and the welding neck diameter (WND). This type of connection is suitable for low-pressure systems that require minimal leakage protection. Another popular type of socket weld flange is the slip-on variety; this type features a smooth interior surface that allows it to fit snugly over pipes or other items without any additional hardware. And finally, there are blind socket weld flanges—these have no opening on one side but instead feature two hubs that allow them to be attached directly to a pipe or other fitting without any extra hardware required.

Socket Weld Flanges Dimension

Socket Weld Flanges Dimension

Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Flange Length RF Dia. RF Height Socket Depth PCD Socket Bore No of Bolts Bolt Size UNC Machine Bolt Length RF Stud Length Hole Size ISO Stud Size Weight in kg
1/2 15 90 9.6 30 14 34.9 2 10 60.3 22.2 4 1/2 50 55 5/8 M14 0.8
3/4 20 100 11.2 38 14 42.9 2 11 69.9 27.7 4 1/2 50 65 5/8 M14 0.9
1 25 110 12.7 49 16 50.8 2 13 79.4 34.5 4 1/2 55 65 5/8 M14 0.9
1 1/4 32 115 14.3 59 19 63.5 2 14 88.9 43.2 4 1/2 55 70 5/8 M14 1.4
1 1/2 40 125 15.9 65 21 73 2 16 98.4 49.5 4 1/2 65 70 5/8 M14 1.4
2 50 150 17.5 78 24 92.1 2 17 120.7 61.9 4 5/8 70 85 3/4 M16 2.3
2 1/2 65 180 20.7 90 27 105 2 19 139.7 74.6 4 5/8 75 90 3/4 M16 3.2
3 80 190 22.3 108 29 127 2 21 152.4 90.7 4 5/8 75 90 3/4 M16 3.7


Socket weld flanges are incredibly useful components in many industrial applications where secure connections are needed between two equipment or piping systems. With their strong construction and ability to withstand high temperatures, they can provide reliable connections over long periods—making them ideal for many scenarios where space constraints may be an issue and situations where minimal leakage protection is desired. Understanding what socket weld flanges exist and how they work will help you decide which type works best for your specific application needs.

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What is a Socket Weld Flange? Types, Dimension and Uses

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