These are used to seal pipes and vessels.
These are manufactured to dimensions that will slide over a pipe with snug fit and are available in both ring and hub style.
These are used to fit on pipes with external threads for weld free fits.
Lap Joint Flange
These are used to pair with stub end fittings for easy dismantling
Weld Neck Flange
These are manufactured to match the inside diameter of a pipe for attachment via welding.
Socket Weld Flange
These are designed with a socket fit and top weld for ideal inner flow in pipes.
Stub ends are buttweld fittings that can be used (in combination with a lap joint flange) alternatively to welding neck flanges to make flanged connections.
Orifice flanges, abbreviated as ORFF, are for metering the volumetric flow rate of liquids and gasses through a pipe. Two orifice flanges are called an orifice flange union. Each flange comes with two pipe taps for measuring the pressure drop of the flow through an orifice plate.