Pipe flanges connect pipes and components in a piping system by using bolted connections and gaskets. The most commonly used flanges are butt welding flanges, sliding flanges, blind flanges, socket welding flanges, threaded flanges and lap joint flanges (RTJ flanges). This type of connection in pipe flanges facilitates disassembly and disconnection for service and regular maintenance. The most common specification for carbon steel and stainless steel flanges is ANSI B16.5 / ASME B16.5.