Construction and installation standards - Exceptions

1. Unfired pressure vessels may not be installed in North Dakota unless such vessels have been constructed in accordance with the American society of mechanical engineers boiler and pressure vessel code, section VIII, division 1, 2, or 3, and bear the American Society of Mechanical Engineers stamping as proof of such construction. 2. Manufacturers shall register unfired pressure vessels with the national board of boiler and pressure vessel inspectors. Unfired pressure vessels must bear the required stamping of the national board. 3. The requirements of this section apply to all pressure vessels within the scope of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, section VIII, division 1, 2, or 3, with these exceptions: a. Pressure vessels under federal control. b. Pressure vessels that do not exceed four cubic feet [30 United States gallons] in volume and two hundred fifty pounds per square inch gauge [1723.70 kilopascals] in pressure. c. Pressure vessels that do not exceed one and one-half cubic feet [11.22 United States gallons] in volume and six hundred pounds per square inch gauge [4136.88 kilopascals] in pressure. d. Unfired pressure vessels installed or ordered prior to November 1, 1987. However, these unfired pressure vessels must be maintained in a safe operating condition using ANSI/NB-23 and ANSI/API-510 as guidelines. Unfired pressure vessels referenced by this section must be protected with the American Society of Mechanical Engineers stamped pressure relief devices as defined in section VIII of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code. Existing pressure relief devices installed on unfired pressure vessels referenced by this section will be considered acceptable if the pressure relief device is set for the correct pressure, if the usage is correct, and if the device is in a satisfactory operating condition.