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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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asphalt mastic, urethane or other material specially approved by the Department 
for specific reasons. 
iii. 
All surface pipelines shall be painted, raised and maintained above ground on 
permanent supports. 
iv. 
All pipeline construction shall be carried out in a manner that will minimize 
disturbance to the environment. 
v. 
Special precautions shall be taken to protect the pipeline from washouts, 
unstable soil, landslides, or any other hazards that may cause the pipeline to 
move or be subjected to abnormal loads. 
vi. 
All pipelines welding shall be in accordance with the provisions of API STD 1104-
2013 while welding inspection shall be by non-destructive method preferably 
using Radiographic method contained in API STD 1104-2013 or its later editions. 
3.3.1 Minimum Requirements for Pipeline Burial 
a. Ditching for the pipeline shall follow good pipeline practice and consideration for 
public safety as provided for in the Standard API RP1102-(R2017) shall be followed. 
b. Minimum soil coverage of pipelines shall be as follows: 
i. 
Dry land – 1.0 meter. 
ii. 
River crossings and riverbeds – 1 meter. 
iii. 
Drainage ditches, Railroad and Highway Crossing – 1.5 metres 
iv. 
Rocky Areas – 0.9 metres 
v. 
Swamp – 1.0 meter 
vi. 
Shipping Channels – 2.0 metres  
c. At railroad and highway crossings, in addition to the specific requirement of the 
relevant Government Agency responsible for these infrastructures, the following 
precautions shall be taken: 
i. 
Installations of carrier pipe or casing shall be in accordance with API RP1102-
(R2017). 
ii. 
The casing shall be insulated from its carrier pipe support and shall extend 
to both sides of the railroad or highway.  In the alternative the crossing 
could be of a thicker wall line pipe covered with compacted full and 
protective reinforced concrete slab.