Section 12-903 - Applicability and scope of subtitle.
§ 12-903. Applicability and scope of subtitle.
(a) Applicability.- Except as otherwise provided in this subtitle, this subtitle applies to all boilers and pressure vessels.
(b) Scope.- This subtitle does not apply to:
(1) a boiler or pressure vessel that is under federal control or regulation;
(2) a pressure vessel that:
(i) is used to transport or store compressed gases;
(ii) is constructed in compliance with specifications of the U.S. Department of Transportation; and
(iii) when charged with gas, is marked, maintained, and periodically requalified for use, as required by the regulations of the U.S. Department of Transportation;
(3) an air tank that is located on a vehicle that is operating under the rules of other State authorities and is used for carrying passengers or freight;
(4) an air tank that is installed on the right-of-way of a railroad and is used directly in the operation of trains;
(5) a pressure vessel that does not exceed:
(i) 5 cubic feet in volume and 250 psig pressure;
(ii) 1 1/2 cubic feet in volume and 600 psig pressure; or
(iii) an inside diameter of 6 inches with no limitation on pressure;
(6) a pressure vessel that operates at a working pressure not exceeding 15 psig;
(7) subject to subsection (c) of this section, a vessel that contains water under pressure, including a vessel that contains air, the compression of which serves only as a cushion, if neither of the following limitations is exceeded:
(i) a design pressure of 300 psig; and
(ii) a design temperature of 210 degrees Fahrenheit;
(8) a hot water supply boiler that is equipped with a safety relief valve and is directly fired with oil, gas, or electricity if none of the following limitations is exceeded:
(i) heat input of 200,000 BTU/hour;
(ii) water temperature of 210 degrees Fahrenheit; and
(iii) nominal water capacity of 120 gallons;
(9) a mechanical device of any of the following types:
(i) a pump;
(ii) a compressor;
(iii) a turbine;
(iv) a generator; or
(v) a hydraulic or pneumatic cylinder; or
(10) the water-containing part of an air-conditioning or refrigeration system condenser or evaporator:
(i) that uses halocarbon refrigerant;
(ii) that is constructed in accordance with the requirements of ANSI/ASHRAE Standard 15 (the Safety Code for Mechanical Refrigeration) in effect at the time of construction; and
(iii) if neither of the following limitations is exceeded:
1. a design pressure of 300 psig; and
2. a design temperature of 210 degrees Fahrenheit.
(c) Water additives.- For purposes of subsection (b)(7) of this section, water may contain additives if the ASTM flash point of the aqueous solution at atmospheric pressure is 185 degrees Fahrenheit or higher.
[An. Code 1957, art. 48, §§ 168(a), 172(a), (c), (e); 2003, ch. 5, § 2; 2004, ch. 351; 2007, ch. 5, § 7.]