Why do gaskets fail?

For many reasons and often a combination of different factors, here are some things to consider;

  • Are the flanges even/flat?
  • Is the Torque correct?
  • Are the bolt spaces even?
  • Is the gasket too thick?
  • Is the material correct? (resistant to fluid, service chemicals, temperature etc?)
  • Too old (gaskets have a shelf life)
  • Blow out (pressure inconsistencies)