Flange is a device designed for seamless connection of pumps, pipes and valves. This connection method provides an easy way to modifying, cleaning or inspecting the system. Usually, the flanges come with welded or threaded connection; however, the market offers custom stainless steel flanges solutions as well – the firms like AlexanderComley produce both standard and custom-made flanges that meet virtually any requirements.

Flange mounting itself implies using bolts; impermeability is achieved due to gaskets. Industrial flanges are constructed from various materials: with processed surfaces in store, flanges are made from cast iron, stainless steel, brass, plastic, bronze and etc. In addition, flanges, just like pipes and fittings for special application, often have an internal coating of a different quality in comparison with external coating. According to AlexanderComley, bespoke flanges, tubesheet and butt weld fittings uk are oftentimes manufactured from the same material used in the production of pipes.

O-ring and gasket position depends on the implementation of surface and shape of the flange. The most commonly used types are as follows: surface with a projection; groove for the O-ring; flat surface; surface with internal and external thread and tongue and groove joints. It is important that the flange surface are characterised by minor roughness, to ensure the highest quality of the seal. The most widespread types of surface processing are roughing, spiral notching, concentric grooving and smoothing.

To provide the necessary tight flanged connection using gaskets is obligatory. An average gasket is a ring or pressured plates that used for water-resistant mounting. Gaskets are manufactured at extreme temperatures and pressures and are made of non-metallic, semi-metallic and metallic materials. The principle of operation is simple enough: a gasket is clamped between two flanges, and thereby fills the microscopic unevenness and the surface area to prevent leakage of gases and liquids. Continue reading