Library / Applicable to all Oil & Gas Operators GUIDELINES FOR THE OPERATIONS OF PETROLEUM REFINING FACILITIES Code: DPR GUIDE 0044 - 2021 Review Date: 3rd February 2021

Applicable to all Oil & Gas Operators GUIDELINES FOR THE OPERATIONS OF PETROLEUM REFINING FACILITIES Code: DPR GUIDE 0044 - 2021 Review Date: 3rd February 2021

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Applicable to all Oil & Gas Operators  
GUIDELINES FOR THE OPERATIONS OF PETROLEUM REFINING FACILITIES 
Code: DPR GUIDE 0044 - 2021 
 
Review Date: 3rd February 2021 
 
 
 
This is a property of the Department of Petroleum Resources. All rights reserved  
 
20 
8.3 
STORAGE TANK INTEGRITY TEST AND CALIBRATION 
For every new or refurbished storage tanks, the refiner shall forward the following 
documents and information to the Department of Petroleum Resources for 
(re)calibration/integrity test exercise of the storage tank: 
i. 
An application in writing made on Company’s letter headed paper declaring the 
intent to conduct (re)calibration/integrity test of a new/existing refining 
facility/equipment. 
ii. 
A letter of introduction for the Engineering Firm (must possess a valid DPR Oil and 
Gas Industry Services Permit (OGISP) for the service to be rendered) nominated by 
the company to carry out the calibration/integrity test of the storage tank. 
iii. 
Evidence of payment of (re)calibration/inspection fee of Five Hundred Thousand 
Naira Only (N500,000) payable to “Department of Petroleum Resources”.  
 
Calibration of Storage Tanks  
i. 
Before a tank is used for any storage, it shall be properly calibrated in the presence 
of DPR Representative(s), and by a method acceptable by the Department and 
calibration table of the tank shall be forwarded to the Director/CEO for approval.  
ii. 
If for any reason any tank which has been in use requires to be recalibrated, the 
calibration shall be done in the presence of DPR representative(s) and calibration 
tables of the tank shall be forwarded to the Director/CEO for approval.  
iii. 
The frequency of calibration/integrity test shall not exceed every 5 years.  
iv. 
The validity of an approved calibration chart of storage tanks for the refining plant 
shall be for a period not exceeding Five (5) years.  
After a satisfactory calibration/integrity test, four (4) each per tank of duly signed copies 
of the tank calibration chart shall be forwarded to the Department for review and 
approval. The refiner shall be eligible for a copy of the approved certificate of calibration.