Q-2, r. 4.1 - Clean Air Regulation

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47. The plan referred to in section 46 must cover all of the following equipment parts:
(1)  gate valves and other valves of a diameter equal to or greater than 1.875 cm;
(2)  pump, compressor and agitator seals;
(3)  joints or connections of a diameter equal to or greater than 1.875 cm; and
(4)  open pipes.
Equipment maintained under negative pressure or completely covered with thermal insulation is excluded from the plan.
For the purposes of this section, an open pipe means a gate valve or a valve, except a pressure relief valve, with one side of the seat in contact with one of the substances referred to in section 46 and the other side exposed to the atmosphere.
O.C. 501-2011, s. 47.