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The National Board of Boiler and Pressure Vessel Inspectors (NBBI) is composed of chief boiler and pressure vessel inspectors representing states, cities, and provinces enforcing pressure equipment laws and regulations. These laws and regulations represent the collective input of National Board members. [1]
A fire-tube boiler exploded at the Grover Shoe Factory in Brockton, Massachusetts, on March 20, 1905, which resulted in the deaths of 58 people and injured 150. Then on December 6, 1906, a boiler in the factory of the P.J. Harney Shoe Company exploded in Lynn, Massachusetts. As a result, the state of Massachusetts enacted the first legal code ...
Power boilers: 53 Heating boilers: 54 Pressure vessels: 56 Piping systems and appurtenances 57 Welding and brazing: 58 Main and auxiliary machinery and related systems 59 Repairs to boilers, pressure vessels and appurtenances 60 [Reserved] 61 Periodic tests and inspections 62 Vital system automation 63 Automatic auxiliary boilers 64
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Many U.S. states have licensing for boiler operation. Some of these are listed as follows: Arkansas [46] Georgia [47] Michigan [48] Minnesota [49] Montana [50] New Jersey [51] North Dakota [52] Ohio [53] Oklahoma [54] Oregon [55] Finally, some U.S. cities may have additional labor laws that apply to HVAC professionals.
The larger boilers were 15 feet 9 inches (4.80 m) in diameter and 20 feet (6.1 m) long, the smaller were 11 feet 9 inches (3.58 m) in length. All ends had three corrugated Morrison furnaces of 3 feet 9 inches (1.14 m) diameter, 159 furnaces in total, and a working pressure of 215 pounds per square inch (1,480 kPa).
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