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 107 of 194

Open the PDF at page 107

 
 
 
 
Applicable to all Oil & Gas Operators  
GUIDELINES FOR THE ESTABLISHMENT AND OPERATIONS OF GAS 
STORAGE AND UTILISATION FACILITIES IN NIGERIA 
Code: DPR Guide 0020 - 2020 
 
Revision Date: 1st September 2020 
 
 
 
This is a property of the Department of Petroleum Resources. All rights reserved  
 
16 
xii. 
The installation of the underground tank shall be in such a way that enables easy 
removal without jeopardising the safety or integrity of adjacent tanks or 
infrastructure. 
xiii. 
Where the soil may be corrosive, the tank shall be set on a clean shingle or sweet 
sand free of extraneous materials to avoid seepage of products to underground 
water courses or any drainage system. 
xiv. 
Foundations and sub-soil shall be examined and prepared to support the tank to 
prevent movement, uneven settlement or concentrated loading in the tank shell. 
3.4.1.1 
Corrosion Protection for Buried Tanks 
i. 
A suitable system of cathodic protection (typically sacrificial anode for small 
installations and impressed current for large installations) shall be provided.  
ii. 
External surfaces of the tank should be suitably prepared and treated with coating 
manufactured and applied in accordance with a recognised standard, to both 
protect against chemical and mechanical damage and minimise cathodic protection 
current drain. 
3.4.2 Requirements for Storage Cylinders  
Where LPG storage installation consists of a set of cylinders, the installation shall be in line 
with relevant codes and standards and shall comply with the following:  
i. 
The construction or installation of cylinders should be in form of two or more sets 
of paired cylinders connected to a manifold, with supply provided from one pair of 
cylinders at any time. 
ii. 
The installations should enable cylinders to stand upright, secured by straps or 
chains against a wall outside the building. 
iii. 
The cylinders should be positioned on a firm, level base such as concrete of at least 
50mm in thickness or a paving slab bedded on a mortar. It should be located in a