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Weld Neck

Welding Neck flanges are designed to be joined to a piping system by bun welding. The neck or hub transmits stresses to the pipe, reducing stress concentrations at the flange base. The gradual thickness transition from the hub base to the wall thickness at the bun weld provides critical flange reinforcement.

Thread Flange

Threaded flanges are similar to slip-on pipe flanges except for the bore of threaded pipe flange has tapered threads. These flanges are ideal for relatively low-pressure piping systems. Threaded flanges are used with pipes that have external threads. The benefit of these pipe flanges is that they can be attached without welding.

Blind Flange

A Blind flange is a round plate but no center hole that has all of the relevant bolt holes, and because of this, it is used to close off the ends of piping systems and close off pressure vessel openings. It also permits easy access to vessels or piping systems for inspection purposes.

These flanges are attached by inserting the pipe into the socket end. It allows for a smooth bore and a better flow of the fluid or gas inside. Socket-weld pipe flanges are mainly used for smaller sizes of high-pressure pipes.

Socket Weld Flange

Slip-On Flange

A Slip-on pipe flange is slipped over the pipe and then welded both inside and outside to provide sufficient strength and prevent leakage. These flanges are ideal for lower pressure applications. It is used in preference to weld necks by many users because of its lower cost and the fact that less accuracy is required when cutting pipe to length.

Lap Joint Flange

Lap Joint Flanges slide over the pipe and are most commonly used with stub end fittings. A pipe is typically welded to the stub end, and the lap joint pipe flange is free to rotate around the stub end. Lap Joint pipe flanges are often used for applications that require frequent dismantling. Threaded pipe flanges are often used for small diameter, high-pressure requirements.

About bNiks

Pune, Maharashtra, India -based flange manufacturer specializing in ASME B16.5 standards, serving global oil & gas and EPC clients with precision and reliability.

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