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

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Stamping:
1. Repairs and alterations: As required by the National Board and New Jersey Administrative Code (NJAC 12:90).
2. New construction: ASME Code and New Jersey Administrative Code or equivalent code accepted by The National
Board of Boiler and Pressure Vessel Inspectors.
ObJeCtS SUbJeCt tO rUleS FOr COnStrUCtIOn anD StampInG
All boilers and pressure vessels, except the following:
1. Those under federal inspection and control.
2. Steam or hot-water boilers having less than 10 square feet of heating surface.
3. Steam or hot-water boilers having a heat input of less than 10 kW or 40,000 BTU per hour.
4. Steam boilers when constructed for a pressure not exceeding:
a. 15 psi steam when serving dwellings of fewer than six family units or accommodation of less than 25 persons;
b. 160 psi and 250°F hot water when serving dwellings of fewer than six family units or accommodating less than
25 persons.
5. Unfired pressure vessels in which steam is not generated may be exempted from shop inspections by qualified inspectors
provided they comply with ASME Code construction, are of simple single-wall construction, and are stamped with
the ASME “UM” Code symbol, or a stamp specified by the bureau:
a. 5 cubic feet in volume and 250 psi design pressure;
b. 1-1/2 cubic feet in volume and 600 psi design pressure.
6. Those having a nominal capacity of 120 gallons or less, used for containing water under pressure, including those containing
air, the compression of which serves only as a cushion.
7. Those serving as a hot-water storage tank, heated by steam or any other indirect means, when none of the following
limitations is exceeded:
a. A heat input of 200,000 BTU per hour;
b. A water temperature of 200°F;
c. A nominal water-containing capacity of 120 gallons.
8. Those having an internal or external operating pressure not exceeding 15 psi, with no limitation on size.
9. Those having an inside diameter of 6 inches or less, with no limitation on pressure.
ObJeCtS SUbJeCt tO rUleS FOr FIelD InSpeCtIOn
Same as OBJECTS SUBJECT TO RULES FOR CONSTRUCTION AND STAMPING, except:
1. Refrigeration systems using flammable or toxic refrigerants with 3 tons refrigerating capacity or less requiring 6 driving
hp or less.
a. Flammables are those classified in ASHRAE 34 as A2, B2, A3, or B3.
b. Toxic refrigerants are those classified in ASHRAE 34 as B1, B2, or B3.
c. Nonflammables are those classified in ASHRAE 34 as A1 or B1.
d. Nontoxic are those classified in ASHRAE 34 as A1, A2, or A3.
2. Refrigeration systems using nonflammable and nontoxic refrigerant with 18 tons refrigerating capacity or less or requiring
36 driving hp or less, operating at a pressure of 15 psig or less.
3. Excluded from inspection is equipment used solely for the propulsion of motor vehicles under the Motor Vehicles Act,
Title 39.
InSpeCtIOnS reQUIreD
1. Boilers:
a. An annual internal and external inspection for steam boilers;
b. An annual external inspection and biennial internal inspection for hot-water boilers.
2013 National Board Synopsis of Boiler and Pressure Vessel Laws, Rules and Regulations