Library / B 771 Federal Republic of Nigeria Official Gazette No. 106
B 771 Federal Republic of Nigeria Official Gazette No. 106

Page 11 of 29
B 781
(q) apparatus, cable, fitting and any other electrical material shall be
installed and maintained to ensure that the flame proof or explosion proof
characteristics, as the case may be, are not invalidated ;
(r)  apparatus used for communication purpose within a dangerous area,
shall be certified intrinsically safe in conformity with acceptable and
recognised standards ;
(s) control device conform to industry best practice, with respect to
design, installation and maintenance, and safety guards shall be incorporated
as applicable, to avoid accidents ;
(t) pressure gauge used within hydrocarbon handling installations shall be —
(i) inspected and calibrated for accuracy at intervals not exceeding
12 months, and
(ii) tagged with relevant maintenance details ;
(u)  pressure vessel and its fittings in operation shall be regularly examined
in accordance with the manufacturer’s recommendations and where no
recommendations exist, then inspection shall be carried out in accordance
with best practice ;
(v) records of every inspection carried out under these Regulations shall
be maintained and made available to the Authority on demand ;
(w) oil heater and its internal and external parts or fittings shall be
inspected at intervals of not more than 12 months and the fire tubes replaced
when they are at the minimum thickness ;
(x)  compressed air system or receiver shall be —
(i) drained of liquid every day and the liquid appropriately disposed of,
and
(ii) tested to the recommended pressure hydraulically or other methods
approved by the Authority when the internal surface of the receiver
cannot be inspected, and in any other case, at least once in every 36
months ;
(y) gas separator and scrubber shall be tested to the recommended test
pressure in accordance with applicable industry codes but at intervals not
more than five years ;
(z) vessel that has been in service for more than 20 years, shall be —
(i)  assessed to establish remaining life,
(ii) inspected at intervals of not more than 18 months, and
(iii) tested hydraulically to the recommended test pressure during the
inspection ;
(aa) relief valve and process safety valve shall be inspected at least
once in every 18 months or at such shorter intervals as shall be necessary
to maintain them in satisfactory conditions to ensure that it —
(i) operates effectively whenever the maximum allowable working
pressure is applied, and
(ii) pass full design quantity at those settings ;