Flange Questions

Straight answers to the questions that come up on the shop floor.

• Should I use a raised-face or flat-face flange? Depends on what it bolts to.
• How do I choose a gasket for a flange? Start with the fluid and temperature.
• Can flange gaskets or bolts be reused? Gaskets, almost never. Bolts, sometimes.

For the bigger picture, see flange types.