Regulation 46. Doors.

                                   P.U.(A) 5/70

FACTORIES AND MACHINERY (STEAM BOILER AND

                  UNFIRED PRESSURE VESSEL)

                           REGULATIONS, 1970

        PART III - UNFIRED PRESSURE VESSELS

Regulation 46. Doors.

Where it is necessary to load and unload an unfired pressure vessel any door fitted thereto shall-

(i) if of the bayonet or other quick opening type, be provided with a mechanical interlock

that will prevent the door from being opened until all internal pressure has been relieved;

(ii) if of the bolted type, be provided with a tell-tale valve in full sight of the attendant.

Such tell-tale valve shall indicate by visual or other means the absence of pressure in the

unfired pressure vessel.

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