Types of Stainless Steel Flanges and Their Applications Explained

Today, stainless steel is one of the most popular metals used. Due to its physical properties, such as corrosion resistance and durability, this metal scores over several other metal Flanges. This metal is used in the production of a wide variety of industrial, commercial, and residential items.

A popular stainless steel product is pipes. Certain stainless steel accessories support these stainless pipe flanges. A stainless steel flange is one such accessory used to support steel pipe flanges. A wide range of Stainless flanges are available for purchase. There are eight types of Stainless flanges that you should be aware of in this post.

Types of Flanges

Slip On Flanges

Slip-on flanges consist of a ring placed over the end of the types of pipe flanges, with a flange face that extends sufficiently from the end to apply a welded bead to the inner diameter. These flanges slip over a pipe, hence their name, Slip On Flanges. Slip-on flanges are also called SO flanges. It’s a kind of flange that slides over the pipe and is slightly bigger than the pipe. The top and bottom of the SO flange can be welded directly to equipment or pipe because the inner dimension of the flange is slightly larger than the external dimension of the stainless pipe flanges. The pipe is inserted into the inner hole of the flange with this tool. With a raised or flat face, Types of pipe flanges are used. Low-pressure applications benefit from slip-on flanges. Many fluid pipelines use slip-on flanges excessively.

Weld Neck Flanges

A Weld Neck Flange is also known as a tapered hub flange or a high-hub flange. A stainless steel weld neck flange (WN flange) has a neck that can move the pipe tension, thereby reducing the pressure gathered in the Flange bottom. The material is compatible with pipelines that operate at high or low temperatures and withstand high pressure pipe flanges. A welding neck flange is easily identified by its long tapered end, which slowly passes through the wall thickness of a pipe or fitting. The long tapered hub provides significant shielding for use in applications involving high pressure, sub-zero temperatures, and/or high temperatures. A stainless steel weld neck flange consists of a circular fitting with a protruding edge around its circumference. Pressures up to 5,000 psi have been successfully applied to Weld Neck Flanges.

Socket Weld Flanges

There is only one fillet weld connecting socket weld flanges on the outside, so they are not recommended for critical services. Most of the time, they are used for small-bore lines. The static strength is the same as Slip On flanges, but the fatigue strength is 50 percent higher than double-welded Slip On flanges. The bore length of these flanges should be determined by the thickness of the connecting pipe. Before welding, a gap must be formed between the socket weld flange and the pipe. A socket weld’s bottom clearance is designed to minimise residual pressure at the weld root during metal solidification. Making the right space is one drawback of the socket weld flange. In steel pipe flange systems, corrosion can occur between the pipe and the flange due to corrosive products. This flange is not allowed in some processes. This flange must also be welded first by a pipe and then by a fitting.

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