Library / Page 1 of 67 MIDSTREAM AND DOWNSTREAM PETROLEUM SAFETY AND ENVIRONMENTAL REGULATIONS, 2025

Page 1 of 67 MIDSTREAM AND DOWNSTREAM PETROLEUM SAFETY AND ENVIRONMENTAL REGULATIONS, 2025

Page 15 of 67

Page 15 of 67 
 
(w) oil heater and its’ internal and external parts or fittings shall be inspected at 
intervals of not more than 12 months and the fire tubes replaced when they are at 
the minimum thickness; 
(x) compressed air system or receiver shall be —   
(i) drained of liquid every day and the liquid appropriately disposed of, and
   
(ii) tested to the recommended pressure hydraulically or other methods 
approved by the Authority when the internal surface of the receiver 
cannot be inspected, and in any other case, at least once in every 36 
months;   
(y) gas separator and scrubber shall be tested to the recommended test pressure in 
accordance with applicable industry codes but at intervals not more than five 
years; 
 
(z) vessel that has been in service for more than 20 years, shall be — 
  
(i) assessed to establish remaining life, 
(ii) inspected at intervals of not more than 18 months, and 
  
(iii) tested hydraulically to the recommended test pressure during the 
inspection;  
(aa) relief valve and process safety valve shall be inspected at least once every 18 
months or at such shorter intervals as shall be necessary to maintain them in 
satisfactory condition to ensure that it — 
(i) 
operates effectively whenever the maximum allowable working 
pressure is applied, and 
  
(ii) passes the full design quantity at those settings; 
(bb) safety valves shall be stamped or tagged at its popping-pressures, and where 
appropriate, bursting discs of equivalent rating may be used in lieu of safety 
valve; 
  
(cc) pressure vessel shall be tested with a calibrated pressure gauge which shall be 
—