Guideline A-42

WGP date: 08/01/2016

Guideline related to: Article 2 par. 3, Annex I Section 2.2.1

Question

Is the discharge piping from a pressure safety accessory, which will be exposed to a pressure PS above 0,5 bar, in the scope of the Pressure Equipment Directive (PED) when exhausting to ambient atmosphere?

Answer

Yes.

Reason:
Even though discharge piping will be only momentarily pressurised, and such piping is open at the discharge end, it fulfils the definition of piping in Article 2 (3).

Note 1:
A silencer installed in the discharge piping is excluded according to Article 1 paragraph 2 (p).

Note 2:
The location where the pressure PS is specified shall be such to be representative of the maximum pressure to which the piping will be exposed.