What standards are referenced for flare system design?

The main specifications applied to flare sytem design are:

  • ASME B16.5 Steel Pipe Flanges and Flange Fittings
  • ASME B31.3 Process Piping
  • API RP 521 Guide for Pressure Relieving and Depressurising Systems
  • API 537 Flare Details for General Refinery and Petrochemical Service

 (Note: ISO 2547:2008 is identical to API 537 2nd Ed.)

A number of the large oil and gas operators have their own design specifications that compliment those above.

Other specifications applied include those associated with fabrication (welding, NDE, and materials).