PNP Special Promotions Guidelines and Procedures

Boilers must undergo hydrostatic testing at specified pressures during construction, installation, reconstruction/repair phases.
- 1.5 times design pressure after construction/fabrication and installation.
- 1.2 times maximum allowable working pressure after reconstruction or repair.
Hydrostatic tests must be conducted at water temperatures between 21°C (70°F) and 71°C (160°F).
Inspections are coordinated with scheduled plant shutdowns for maintenance, occurring at intervals not exceeding 18 months.
Owners/operators must notify the Regional Office 30 days before scheduled shutdown; failure results in suspension of operating permits.
Boilers must be drained, cooled, opened, and cleaned prior to inspection.
If non-compliance occurs, technical safety inspectors may decline inspection.
Hydrostatic pumps must be ready for testing.
Non-Destructive Testing (NDT) methods such as radiographic, ultrasonic, thickness gauging, magnetic particle, liquid penetrant, or equivalent tests may be conducted instead of hydrostatic tests periodically (not exceeding 18 months), performed by DOLE-accredited organizations.

Hydrostatic testing requirements similar to power utility boilers but with some differences:
- 1.5 times design pressure during construction, installation, and post-repair.
- Tests also done at temperature range 21°C to 71°C.
- Test pressure shall not exceed 6% over the required pressure.
- Safety valves removed during tests, held down using clamps (not by screwing compression screws).
Notice of Inspection must be served 30 days before permit expiration.
Boilers must be prepared (drained, cooled, opened, cleaned) before inspection; non-compliance results in declined inspection.
Hydrostatic pump must be ready.

Power Utility Boilers:
- Hydrostatic tests every 5 years unless conditions (scale, cracks, corrosion, wastage) detected during inspection warrant earlier testing.
Industrial Boilers:
- Hydrostatic tests must be done at intervals not exceeding 12 months.

Hydrostatic and non-destructive tests must be conducted in the presence of technical safety inspectors.

Boilers deemed unsafe are prohibited from operation; permits are withheld until defects are corrected.
Permit validity:
- 18 months for power utility boilers.
- 12 months or 1 year for industrial and other boilers.

Inconsistent existing policies, rules, or regulations are repealed or amended accordingly.
Amendments take effect 15 days after publication in two newspapers with general circulation.

Timely notification and preparation for inspections are mandatory to ensure compliance and avoid penalties.
Failure to comply may result in suspension of the permit to operate the boiler.