The Weld Neck Flange features a long tapered hub that is butt-welded to the pipe, providing excellent stress distribution and superior resistance to fatigue under cyclic loading and high-pressure conditions. It is the most widely specified flange type in critical process piping.

The Slip On Flange slides over the pipe and is fillet-welded both inside and outside. It is easier to align and more economical than weld neck flanges, making it a preferred choice for low- to medium-pressure applications and utility piping systems. Read more for details

Blind Flanges are solid discs with no bore, used to close the end of a pipeline, nozzle, or vessel opening. They are also used for pressure testing and inspection access in piping systems. Blind flanges are available in all pressure classes from Class 150 to Class 2500.

Socket Weld Flanges incorporate a socket into which the pipe is inserted and then fillet-welded. They are designed for small-bore piping up to NPS 3" and are widely used in high-pressure systems including hydraulic and instrumentation lines.

Threaded Flanges have an NPT-threaded bore and are connected to the pipe without welding — making them suitable for low-pressure, non-critical systems and applications where welding is not permitted due to fire hazard risks.

Lap Joint Flanges are used with stub ends and are free to rotate around the pipe, allowing easy bolt-hole alignment. They are particularly useful in systems requiring frequent dismantling for inspection or cleaning.

The Long Weld Neck Flange, also known as a nozzle flange, features an extended neck and is commonly used as a nozzle on pressure vessels, heat exchangers, and columns where a standard weld neck is insufficient.

Manufactured to ASME B16.36, Orifice Flanges are used in pairs with an orifice plate between them for flow measurement. They incorporate tapped holes for differential pressure measurement instruments and are available in Class 300 to Class 2500.

Manufactured to ASME B16.48, the Spectacle Blind — also called a figure-8 blind — combines a solid blind disc and an open spacer ring in a single component. It allows the operator to isolate or re-open a line by rotating the assembly without disturbing the pipeline.

Paddle Blinds (Spades) and Ring Spacers, manufactured to ASME B16.48, are used individually for positive line isolation during maintenance or shutdown. The paddle blind provides a full seal, while the ring spacer restores flow.

Reducing Flanges allow a reduction in pipe bore at a flanged connection without the need for a reducer fitting, making them a compact solution for connecting pipes of different nominal sizes.

Expander Flanges serve the opposite function of reducing flanges — stepping the bore up from a smaller to a larger size at the flanged joint. They are a single-piece alternative to using a weld neck flange paired with a concentric reducer.

Anchor Flanges are heavy-duty forged flanges buried or encased in concrete to resist axial forces on buried pipelines, preventing movement caused by thermal expansion, pressure thrust, or soil settlement.