A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal. The key types of flanges are the welding neck, long welding neck, slip-on, socket weld, lap joint, threaded and blind flanges, made from a variety of materials like brass, copper, gunmetal, C.I., M.S., ss304, ss316, ss202 etc. Available in sizes ranging 1/2" to 24", across standards ie BSP, BSPT, NPT, Metric, UNC etc.