Library / GUIDE FOR THE ESTABLISHMENT AND OPERATIONS OF DOWNSTREAM GAS FACILITIES IN NIGERIA (LPG, CNG, LNG) ISSUED BY
GUIDE FOR THE ESTABLISHMENT AND OPERATIONS OF DOWNSTREAM GAS FACILITIES IN NIGERIA (LPG, CNG, LNG) ISSUED BY

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Applicable to all Oil & Gas Operators  
GUIDELINES FOR THE ESTABLISHMENT OF AN AUTOGAS 
REFUELLING STATIONS AND  ADD-ON GAS FACILITY IN NIGERIA 
Code: DPR Guide 0042 - 2020 
 
Revision Date: 1st September 2020 
 
 
 
This is a property of the Department of Petroleum Resources. All rights reserved  
 
22 
i. All tanks for the storage of LNG shall be designed for a working pressure 
corresponding to the vapour pressure and at the maximum ambient/ minimum 
temperature that the tanks are likely to reach.   
ii. All LNG tank systems shall be designed for both top and bottom filling.  
iii. The tank must possess devices for measuring the liquid content and its 
temperature. The maximum quantity of LNG filled into any tank shall be such that 
the maximum operating volume it would occupy should not be more than 95% of 
the capacity of the storage.  
iv. Remote-controlled hydraulically operated shut-off valves shall be fitted to each 
storage tank system. 
v. Excess flow valve shall be fitted to prevent the loss of LNG from storage tanks, 
transport tanks and points where flexible hoses are used.  
vi. Vacuum insulated storage tanks shall be considered for use for LNG facilities. 
vii. Storage vessels shall be installed aboveground only and on stable, non-combustible 
foundations outdoors in the open air in a position that will not allow accumulation 
of LNG vapour at ground level. They should never be installed in or on buildings or 
in open pits.  
viii. Fuel degradation in storage shall be considered when determining the size of 
storage containment.  Design shall, where practical, include measures to promote 
a longer storage life, for example, the reduction of heat gain and boil-off. 
ix. There shall be some means of isolation in the pipework between the fuel storage 
vessel and the fuel delivery point (typically, at the tanker hose termination coupling 
or tank control panel).  The isolation shall be closed when fuel deliveries are not 
taking place and/or for maintenance purposes.  The isolation device shall be located 
in a secure area.  
x. Exposed insulation shall be non-combustible, shall contain or inherently be a 
vapour barrier; shall be water-free and shall resist dislodgment by fire hose