flangeplate

A flange plate is a flat sheet or plate that includes a projecting flange around part or all of its perimeter. It is used as a mounting and connection element to join components such as pipes, valves, equipment, or structural members, enabling bolted, gasketed, or welded joints.

Design and features commonly found on flange plates include a bolt circle or bolt holes in the flange, a mating surface that can receive a gasket, and a flat plate portion that provides support or alignment. Flange plates may be welded to another plate or to a pipe, or they may be bolted to compatible flanges on adjacent parts. The specific dimensions, such as flange diameter, bolt pattern, and plate thickness, depend on the expected loads, operating pressure, and environmental conditions.

Materials and fabrication vary by application. Flange plates are typically made from carbon steel or stainless steel, with other metals or alloys used for specialized environments. Manufacturing steps may include cutting to size, drilling bolt holes, machining sealing surfaces, and welding the flange to the plate if required. Surface treatments such as coating or galvanizing may be applied for corrosion resistance.

Applications span piping systems in oil and gas, chemical processing, water treatment, HVAC, shipbuilding, and construction, where standardized flanges or non-standard connection plates are needed. Flange plates are designed to be compatible with common flange standards and bolt patterns, enabling interchangeability and reliable sealing in assemblies.