Library / Midstream and Downstream Petroleum Operations Regulations 2025
Midstream and Downstream Petroleum Operations Regulations 2025

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(5)  A storage vessel with installed measurement systems used for petroleum
liquids or natural gas or its derivatives installed in a vessel shall not be approved
for sailing into Nigeria, unless the following minimum conditions are met —
(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 being
calibrated, recalibrated, tested, compared, measured or weighed against a standard
approved by the Authority.
(7)  Where a licensee or permit holder fails to test or recertify a measurement
system, the Authority may, in addition to any penalty prescribed under these
Regulations, direct a third-party to test and recertify a measurement system and
the licensee or permit holder who has failed to test or recertify the measurement
system shall be responsible for the costs incurred by the third-party so directed
by the Authority.
40.  A person, in the midstream or downstream petroleum industry, shall —
(a)  not operate a measurement system without licence, permit or
authorisation granted or issued by the Authority;
(b)  not commence the maintenance of a measurement system without the
approval of the Authority;
(c)  in the course of operating a measurement system, keep performance
records of metering system, sampling system, proving system, dispensing
system, flow computing system and static measurement system in accordance
with the requirements and conditions prescribed by the Authority;
(d)  not delete the records of any measurement system without the prior
approval of the Authority;
(e)  keep and submit periodic measurement system data when requested
by the Authority;
(f )  ensure that system diagnosis, modification, upgrade and maintenance
are undertaken with the prior approval of the Authority;
(g)  not make any alterations in the measuring or weighing equipment or
appliances, including prover loop detector switch or in the method of
measurement or weighing without the participation and approval of the
Authority;
(h)  conduct meter linearity annually and the report of such exercise shall
be approved by the Authority;
(i) conduct master meter linearity in the manner prescribed by the Authority;
and
(j)  conduct uncertainty analysis for the metering system in the manner
prescribed by the Authority.
Operation
and
maintenance
of
measurement
system