BOILERMAN: Regulation 49. Location of safety valves.

Friday, 22 March 2013

P.U.(A) 5/70

FACTORIES AND MACHINERY (STEAM BOILER AND

UNFIRED PRESSURE VESSEL)

REGULATIONS, 1970

PART III - UNFIRED PRESSURE VESSELS

Regulation 49. Location of safety valves.

Every unfired pressure vessel safety valve shall-

(i) be mounted direct on the unfired pressure vessel:

Provided that where this is not practicable the connecting branch shall have an

unobstructed cross-sectional area not less than the area of the safety valve and shall be

as short as practicable:

Provided further that where an air receiver can be isolated from its protecting safety valve

a suitable fusible plug, the fusible portion of which will melt at a temperature of not more

than two hundred degrees Fahrenheit greater than the working temperature of the air

receiver, shall be fitted to it;

(ii) where it is so located that liquid may collect above the valve, be fitted with a drain at

the lowest point where such liquid can collect. Such drain shall not be less than threesixteenths

of an inch in diameter; and

(iii) have an entrance thereto clear and unobstructed by any internal pipe or baffle and so

situated that the carry-over of any viscous substance cannot block it.

BOILERMAN