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Applicable to all Oil & Gas Operators GUIDELINES FOR THE DESIGN, CONSTRUCTION, OPERATION AND MAINTENANCE OF OIL AND GAS PIPELINE SYSTEMS IN NIGERIA Code: DPR Guide 0027 – 2021

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Applicable to all Oil & Gas Operators  
GUIDELINES FOR THE DESIGN, CONSTRUCTION, OPERATION AND 
MAINTENANCE OF OIL AND GAS PIPELINE SYSTEMS IN NIGERIA  
Code: DPR Guide 0027 – 2021 
 
Effective Date: 14th October 2021 
 
This is a property of the Department of Petroleum Resources. All rights reserved  
 
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wall thickness, and the pipeline does not cross or pass within 100 metres of 
any environmental protection arrangement, otherwise permission of the 
DPR would be required to ensure that adequate contingency plans have 
been made for protecting the environment. 
ii. 
Any pipeline crossing watercourses shall be tested with adequate 
environmental   precautions taken. 
3.4.1 Guide to Pipeline Testing  
a. Unless otherwise authorized by the DPR, the following shall generally apply: 
i. 
The actual test pressure throughout the duration of test shall not exceed 
110% of the minimum yield strength of the pipe material; hence the testing 
equipment shall be pre-set not to produce more than this pressure during 
the test. 
ii. 
The test medium shall be water except with special permission of the DPR     
b. All buried pipelines shall be tested to a pressure not less than 1.25 times the 
internal design pressure.  
c. Surface pipeline transmitting liquid petroleum or gas shall be tested up to a 
pressure not less than 1.25 times the internal design pressure.  
d. All pipelines shall be tested to a minimum pressure of not less than 700 
kilopascals unless otherwise permitted by the DPR. Punctual  
e. The maximum test pressure in all cases shall not result in a hoop stress, greater 
than 110 percent of the specified minimum yield strength of the pipe material 
based on its nominal wall thickness. 
f. Valves and fittings on the pipeline under test shall not be subjected to a pressure 
greater than the manufacturer’s test pressure rating during the test. 
3.5 
Corrosion Control  
The following shall constitute the minimum requirements and the procedure for cathodic 
protection of ferrous pipe and its components from internal and external corrosion the 
design of which shall generally follow the specifications and procedures prescribed in 
NACE SP0169-2013, API RP1160-2019 and other internationally recognised standards 
approved by DPR for managing pipeline system integrity.