double-flanged and wafer-style butterfly valves shown with mating pipe flanges
Flanged vs. Wafer Valve Connections: How to Choose the Right Piping Connection
A practical comparison of flanged-end and wafer-style valve connections for piping design, procurement and maintenance.
used and new spiral-wound flange gaskets beside machined steel flanges
Why Flange Gaskets Should Never Be Reused: Engineering Principles and Best Practices
An engineering guide to gasket deformation, hidden service damage, common gasket types and safe flange-joint reassembly.