The nominal working pressure (NWP)
Nominal working pressure (NWP)' means the gauge pressure that characterises typical operation of a system.
Compliance shall be verified at NWP (Annex 5, paragraph 5 test procedure).
The maximum fuelling pressure is 125 per cent of the Nominal Working Pressure.
In order to prove this, the container is pressurised to its nominal working pressure.
Nominal working pressure under ideal circumstances.
components designed to use compressed (gaseous) hydrogen with a nominal working pressure of over 3,0 MPa
the container between ≤ 2,0 MPa and ≥ 1,25 times the nominal working pressure; or
The component shall be connected for 96 per cent of the total cycles at cryogenic temperature and at rated service pressure.
The component shall be operated through 2 per cent of the total cycles as above at the appropriate room temperature specified at rated service pressure.
The component shall be operated through 2 per cent of the total cycles as above at the appropriate maximum temperature specified at rated service pressure.
In the case of valves, bursting pressure testing is also carried out, at five times the rated operating pressure.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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