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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 AND OPERATIONS OF CNG 
COMPRESSION FACILITIES IN NIGERIA 
Code: DPR Guide 0029 - 2020 
 
Revision  Date: 1st September 2020 
 
 
 
This is a property of the Department of Petroleum Resources. All rights reserved  
 
16 
iv. The minimum pressure-relieving capacity in kilogram per hour shall not be less than 
three percent (3%) of the full tank content in 24 hours.  
v. Conductive parts (e.g. metal fitments) on the installation including fencing, gates, 
tanks and all pipework, vent stacks and vent recovery hoses, shall be adequately 
equipotential (earth) bonded.  
3.6 
Pumps, Compressors and Fittings 
Pumps, other than submersible types, should be adequately secured to a concrete 
foundation or bolted to a structural steel support. Where the drive unit is not integral with 
the pump, attention should be given to ensure correct alignment, and all moving parts 
should be suitably guarded.  
Compressors shall be designed for continuous full head duty, mechanically, electrically or 
hydraulically powered and shall be intended for CNG cylinder refilling applications. Such 
compressors shall usually, but not necessarily, be multistage reciprocating compressors 
with cooled lubricated cylinders of either trunk type or crosshead design. Design details, 
full specifications of compressors shall be submitted to the DPR and approval obtained 
prior to installation. 
Design and operation of the compressor controls shall be such that the compressor shall 
shut down safely in the event of loss of electrical power or loss of hydraulic oil pressure. 
Compressor shall be provided with clear and permanent markings readily accessible and 
easy to read where the compressor is in the installed position. Each compressor shall be 
supplied with installations and operating instructions as well as maintenance schedule. 
3.7 
Emergency Systems 
The following emergency system shall, at the minimum, be installed in the facility: 
i. 
Gas and fire detection system shall be installed and routinely tested.