(a) "board" means the advisory board established by section 28;
(b) "boiler" means a vessel in which gas or vapour may be generated or liquid may be put under pressure by the application of heat and includes a pipe or fitting, prime mover, machinery or other equipment attached to or used in connection with the vessel;
(c) "compressed gas" means a gas contained under pressure whether in a liquid, vapour or dissolved state;
(d) "compressed gas system" means the complete installation of pressure vessels, piping, fittings, compressors, machinery and other equipment used for producing, manufacturing, transferring, storing, distributing or otherwise handling compressed gas;
(e) "department" means the Department of Employment and Labour Relations;
(f) "engineer" means a power engineer who holds a certificate of competency under this Act;
(g) "fitting" includes a safety valve, stop valve, automatic stop and check valve, blow-down valve, reducing valve, water gauge, gauge cock, pressure gauge, injector, test cock, fusible plug, regulating and controlling device as well as pipe fitting attached to or used in connection with a pressure system;
(h) "heating boiler" means a boiler in which gas or vapour is generated, approved to carry a working pressure of 100 kilopascals or less; or a hot water heating or hot water supply boiler approved to carry a working pressure of 1100 kilopascals or less and temperature not exceeding 120° Celsius;
(i) "inspector" means an inspector appointed under this Act;
(j) "miniature boiler" means a boiler approved to carry a working pressure of not more than 700 kilopascals that has a shell with an inside diameter not greater than 400 millimetres and an overall length of not more than 1000 millimetres from outside to outside of the heads and a water heating capacity of not more than 70 kilowatts;
(k) "minister" means the Minister of Employment and Labour Relations;
(l) "owner" includes a person, firm, or unincorporated organization at the time in possession of a pressure system and a manufacturer or agent of a pressure system; and with respect to safety and to the maintenance, care and operation of the pressure system, "owner" includes the manager, chief engineer, or other officer in charge of the local business of the owner or responsible for or in immediate charge of the pressure system;
(m) "power boiler" means a boiler designed to carry and operate at a working pressure of more than 100 kilopascals gauge;
(n) "pressure" means pressure in kilopascals as measured by a pressure gauge;
(o) "pressure piping system" means pipes, tubes, conduits, fittings, gaskets, bolting and other components that make up a system the only purpose of which is the conveyance of gas, vapour or liquid that is either lethal, toxic, flammable, explosive, or expansive and the control of its flow between 2 or more points;
(p) "pressure plant" means an installation of a boiler, pressure vessel, refrigeration system or compressed gas system or a combination of them as a unit under the same owner and management and includes all engines, turbines, compressors, piping, appliances, machinery or equipment attached to them or used in connection with them, whether the unit is portable, automotive or permanently attached to a solid base;
(q) "pressure system" means a boiler, pressure vessel or pressure plant;
(r) "pressure vessel" means a receptacle, other than a boiler, which is or is capable of being used for containing, storing, distributing, transferring, distilling, evaporating, processing, or otherwise handling of a gas, vapour or liquid under pressure and includes a pipe, fitting, or other equipment attached to or used in connection with a pipe or fitting;
(s) "professional engineer" means a professional engineer as defined in the Engineers and Geoscientists Act;
(t) "refrigerating system" means a complete installation of pressure vessels, piping, fittings, compressors, machinery and other equipment by which refrigerants are vapourized, compressed and liquefied in their refrigerating cycle;
(u) "shipping container" means a pressure vessel designed and used for the purpose of transporting a gas, vapour, or liquid from 1 location to another;
(v) "special inspection" means an inspection made or service rendered by an inspector as a result of a request of an owner, other than an inspection required under section 8;
(w) "welding procedure" means the complete specifications of a process and the technique employed in the welding of various kinds and thicknesses of metals; and
(x) "working pressure" means the pressure at which a boiler or pressure vessel may be used or operated under this Act.