Bidirectional Flame Arrester

An in-line flame arrester is considered to be bidirectional if:

  • (a) the investigation (test) shows that the flame arrester performs its intended function with a detonation or deflagration approaching from either direction, or
  • (b) the design of the flame arrester is symmetrical and each end is considered identical when approached by a detonation or deflagration from either direction.