4)All compressed-air recievers shall be drained of liquid daily where the internal surface of the reciever can not be examined and in any event not often less than once every 26months. The reciever shall be tested hydraulically to the recommended test pressures.
5) Gas seperators shall be tested whenever the opportunity occurs and at interval not exceeding five years. They shall be tested to the recommended test pressures which shall not be less than half times the design working pressure.
6)Relieve valves shall be inspected at least once every six months,or at shorter interval as shall be necessary to maintain them in a satisfactory condition to ensure that they operates effectively as soon as the safe working pressure is exceeded.They shall be set to operate at pressure not exceeding ten percent (10%) above the working pressure and shall pass full design quality at the setting.All safety valve shall be stamped or tagged at their set pumping pressure,where appropriate bursting discs may be used in lieu of safety valves.
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