Volume 13 Number 1 - University of the Philippines College of Law

January - March 2002 National Administrative Register 285
(1) Pressure vessels construction procedural process, material, fittings and attachments
shall be in accordance with the standard requirements provided under Rule 1162.01
(2) Pressure vessels shall be designed for their intended use and suitability to local condition.
(3) Every pressure vessel shall be accompanied by a certificate issued by the Manufacturer
showing the technical specifications to which the vessel has been constructed.
(4) Application for permit for locally fabricated pressure vessels shall be filed with the
Bureau or to the Regional Office (with available PME) accompanied by design and
specification in five (5) copies (white print).
1172.03 : Installation :
(1) Pressure vessels shall be installed in a way that all parts are readily accessible for
inspection.
(2) Pressure vessels installed underground shall be placed in concrete or brick pits with
removable covers protected by suitable corrosion protection systems i.e. cathodic protection
or other cathodic coatings as approved by the enforcing inspection authority.
(3) Requirements in the preparation of pressure vessels installation plans including internal
combustion engine and other mechanical equipments shall be as provided under Rule 1168.
1172.04 : Factor of Safety :
The permissible working pressure of the pressure vessel shall be reduced to maintain a
factor of safety of not less that five (5) or such other factor as may have been specified/fixed
in the specification when an inspection of the pressure vessel shows signs of deterioration
unless suitable repairs are done. It shall be reduced or de-rated in accordance to the provisions
of its design code based on the remaining thickness as determined by conducting thicknessgauging
measurement.
1172.05 : Access and Inspection Openings :
(1) Except for those types of pressure vessels, where such inspection openings are
impracticable, pressure vessels shall be provided with:
a. suitable manhole, handhole or other openings or inspection, examination and
cleaning or
b. removable heads or cover plates of a size not less than the required area of the
openings and located to provide adequate view of its interior.
(2) Provisions for manholes and handholes shall be as provided and specified under
ASME requirement based on vessel diameter.
(3) Handhole openings in pressure vessels shall be not less than 70 mm. (2 3/4 in.) in
size.