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

Page 177 of 194

 
 
 
 
Applicable to all Oil & Gas Operators  
GUIDELINES FOR THE ESTABLISHMENT AND OPERATIONS OF A GAS 
RETICULATION FACILITY IN NIGERIA 
Code: DPR Guide 0028 - 2020 
 
Revision Date: 1st September 2020 
 
 
 
This is a property of the Department of Petroleum Resources. All rights reserved  
 
12 
vi. 
Water sprinkler system shall be provided at the top of the vessel. If required, an 
access ladder to the top of the gas storage tank shall be provided for inspection 
and maintenance needs. 
vii. 
Storage systems and vessels shall be fitted with overpressure protection devices to 
release excess pressure under normal operating conditions and in case of 
emergencies.   
viii. 
Manually operated valves shall also be fitted to release pressure during 
maintenance. 
3.3.1 
Additional Requirements for Underground LPG Tank Burial and Leak Test 
LPG storage tanks may be buried.  The requirements for tank burial include the following: 
i. 
No tank(s) shall be buried without DPR approval and the burial must be witnessed 
by DPR officials.   
ii. 
All tanks to be buried shall meet all the specifications of the manufacturer, ASTM, 
and other internationally approved codes. 
iii. 
The excavation of the pit for the LPG storage tank shall permit allowance of not 
less than 70 centimetres when the tank has been set in its final position. 
iv. 
The tank shall be set in a chamber of waterproof concrete of not less than 23 
centimetres thick and the top a watertight detachable or removable concrete slab 
with a manhole at the centre. 
v. 
The manhole of every tank installation shall be raised above the level of the 
surrounding ground to prevent the ingress of surface water. 
vi. 
All piping below ground level shall be protected against damage and corrosion. 
vii. 
All individual tanks shall be provided with efficient electrical earth connections 
independent of pipe connections, having a current not exceeding 10 Ohms when 
measured by an earth resistance tester “Megger” or similar type. 
viii. 
All fixed pipes shall be of metal or fiberglass coated and shall be in a position where 
they may not be liable to damage.