Spade flanges are specialised flanges used in piping systems to isolate components. They consist of two parts: a spade and a spacer. A spade is a flat piece of metal that slides between two flanges in a pipeline. When put between the flanges, it seals off the line and prevents fluid from flowing. Operators can stop the flow of fluid via the pipeline by inserting a spade between the flanges, allowing for safe operation on downstream equipment without totally depressurizing or draining the entire system.

Spade flanges are used in a wide range of industrial applications when temporary isolation of piping systems is required for maintenance, repair, or shutdown processes. Spade flanges are widely used in industries that handle hazardous or corrosive fluids, including oil & gas, petrochemicals, chemical processing, and power generation plants.

Spade flanges should be deliberately put at crucial points in piping systems to provide temporary isolation for maintenance, repair, or shutdown processes. Spade flanges are most commonly installed at pipeline junctions, particularly near valves, pumps, or other equipment that requires isolation. This comprises installations in industries like oil and gas, chemical processing, power production, and water treatment facilities.