FACTORIES AND MACHINERY (STEAM BOILER AND
UNFIRED PRESSURE VESSEL)
Regulation 51. Inter-connected vessels.
Where a number of unfired pressure vessels are inter-connected by a system of piping having a
cross sectional area not less than the area of safety valve required, such safety valve may be
fitted to one of such vessels or fitted to the system inlet pipe, provided that it shall not be possible
to isolate it from any of the vessels.
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