Provide Adequate Supports Manifold piping should be independently supported from the relief valve, and carefully aligned to avoid mechanical stress. Reaction forces from valve discharges and at pipe segment intersections must be considered. Remove relief valves from piping prior to performing the pressure tests. The manifold must discharge to a safe location. Where condensable or toxic materials are present, some type of collection or treatment operation is required.
Examples are water scrubbers and flares.
Atmospheric discharge should be limited to vapors that will not condense at the lowest temperatures encountered in that locality. Reference 3 provides detailed recommendations for the design of catch tanks, scrubbers and flares. Two or three phase flow is expected and must be considered when designing containment and treatment equipment. The discharge system should drain toward the discharge end, avoiding pockets if possible. Unavoidable pockets should be fitted with drip legs or knock-out pots.