Laws, Rules and Regulations - The National Board of Boiler and ...

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3. Steam boilers used exclusively for heating purposes carrying a pressure of not more than 15 psig and which are located
in private residences or in apartment houses of fewer than six families.
4. Hot-water heating boilers with a pressure of not more than 30 psi located in private residences or apartment houses of
fewer than six families.
5. Approved pressure vessels (hot-water heaters, hot-water storage tanks, hot-water supply boilers, and hot-water heating
boilers), with approved safety devices including pressure relief valve, with nominal water-containing capacity of
120 gallons or less having a heat input of 200,000 BTU per hour or less, used for hot-water supply at a pressure of
160 psi or less, and at temperatures of 210°F or less provided, however, that such pressure vessels are not installed in
schools, childcare centers, public and private hospitals, nursing and boarding homes, churches, public buildings owned or
leased and maintained by the state or any political subdivision thereof, and assembly halls.
6. Unfired pressure vessels containing only water under pressure for domestic supply purposes (including those containing
air, the compression of which serves only as a cushion or airlift pumping system), when located in private residences or
in apartment houses of fewer than six families, or in public water systems as defined in RCW 70.119.020.
7. Unfired pressure vessels containing liquified petroleum gases.
InSpeCtIOnS reQUIreD
Item Internal External
Power boilers 1 Year 1 Year*
Organic vapor boilers 2 Years 1 Year*
Low-pressure heating boilers 2 Years 2 Years**
One biennial internal inspection of low-water fuel cutoff.
Hot-water heaters — 2 Years
Unfired pressure vessels 2 Years*** 2 Years
*One inspection while under pressure and one not under pressure.
**Under pressure.
***When subject to corrosion.
InSUranCe InSpeCtIOn reQUIrementS
1. All insurance companies shall notify the chief inspector within 30 days of all boiler and/or unfired pressure vessel risks
written, canceled, not renewed, or suspended because of unsafe conditions. Special inspectors shall perform all inservice
inspections of boilers and unfired pressure vessels insured by their employer. Inspections made by inspectors employed
by insurance companies and commissioned by the department are accepted in lieu of inspections by a department
inspector.
2. Reports of internal and external inspections must be filed with the department on approved forms within 30 days after
inspection.
CertIFICate OF InSpeCtIOn
1. Certificate of Inspection, valid for not more than 14 months for power boilers and for not more than 26 months for lowpressure
boilers and pressure vessels, will be issued by the department upon payment of a fee to the department.
2. No Certificate of Inspection issued for an insured boiler or pressure vessel shall be valid after the boiler or pressure vessel
ceases to be insured by a duly authorized insurance company.
State FeeS
1. Heating boilers (internal inspection):
a. Cast iron, all sizes ..................................................................................................................................................................... $36.30
b. All other boilers less than 500 square feet ........................................................................................................................ $36.30
c. 500 square feet to 2,500 square feet ................................................................................................................................... $72.40
d. Each additional 2,500 square feet of total heating surface, or any portion thereof ..................................................$29.00
2. Heating boilers (external inspection):
a. Cast iron, all sizes ..................................................................................................................................................................... $29.00
b. All other boilers less than 500 square feet ........................................................................................................................ $29.00
2013 National Board Synopsis of Boiler and Pressure Vessel Laws, Rules and Regulations