Library / Page | 1 MIDSTREAM AND DOWNSTREAM PETROLEUM OPERATIONS REGULATIONS, 2024
Page | 1 MIDSTREAM AND DOWNSTREAM PETROLEUM OPERATIONS REGULATIONS, 2024

Page 28 of 101
 
 
Page | 28 
 
(c) fluid properties; 
(d) type of proving method;  
(e) location; and  
(f) project cost estimate.  
 
(4) The design and location of a metering system shall be such that it is 
easily accessible for condition monitoring, maintenance, replacement, 
recertification, and repair works 
40. (1) A licensee or permit holder shall not procure, fabricate, assemble, 
integrate, ship, install, modify or commission a measurement system, 
sampling system, proving system or flow computer without conducting 
appropriate tests, calibration, inspection, and verification exercises. 
(2) The Authority shall witness the activities stated in sub-regulation (1) of 
this regulation.  
(3) The result of a test in sub-regulation (1) of this regulation at a fabrication 
shop or site, shall be validated to ensure the system meets the 
requirements prescribed by the Authority. 
(4) Measurement systems used for petroleum liquids or natural gas or its 
derivatives shall not be approved for shipment into Nigeria, without 
meeting the following minimum conditions - 
(a) meters are tested and calibrated;  
(b) critical equipment are inspected and tested; 
(c) sampling devices are tested and calibrated; and 
(d) proving systems are inspected, tested, and calibrated. 
(5) Measurement systems used for petroleum liquids or natural gas or its 
derivatives installed in a vessel shall not be approved for sailing into 
Nigeria, without meeting the following minimum conditions - 
(a) meters are tested and calibrated;  
(b) critical equipment are inspected and tested; 
(c) sampling devices are tested and calibrated; 
(d) cargo tanks are inspected and calibrated; and 
(e) proving systems are inspected, tested, and calibrated. 
(6) The Authority shall be present when an equipment or appliance for 
measuring or weighing petroleum liquids or natural gas or its derivatives is 
Testing, 
calibration, 
and 
inspection of 
measurement 
system