1961-HKRS30-8-52_Part03 — Page 17

Requirements with respect to air receivers.

(4) For the purposes of paragraph (1), other than the provisions d sub-paragraph (e) thereof, any set of steam receivers supplied with steam through a single pipe and forming part of a single machine may be treated us one steam receiver, and, for the purposes of the said pam- graph (1), other than the provisions of sub-paragraphs (4) and (4) thereof, any other set of steam receivers supplied with steam through a single pipe may be treated as one steam receiver:

Provided that this paragraph shall not apply to any such set of steam receivers unless the reducing valve or other appliance provided to prevent the maximum permissible working pressure of the steam receiver being exceeded is fitted on the said single pipe.

5. (1) Every air receiver shall—

(a) where the air receiver is connected with a compressor, be » constructed as to withstand with safety the maximum pressure that can be obtained in the compressor or be fitted with a suitable reducing valve or other suitable appliance to prevent the maximum permissible working pressure of the air reccives being exceeded;

(b) be fitted with a suitable spring-loaded safety valve that is so adjusted as to permit the air to escape as soon as the maximum permissible working pressure of the air receiver is exceeded; (c) be fitted with a correct pressure gauge, which shall indicate the

pressure of air in the air receiver in pounds per square inch; (d) be fitted with a suitable appliance for draining the air receiver, (e) be provided with a suitable manhole, handhole or other meys that will allow the interior thereof to be thoroughly cleanst and

(f) where more than one air receiver is being used by the same person in any industrial undertaking, bear a distinguishing mark, which shall be easily visible.

(2) Every air receiver, other than a pressure vessel, sball bave marked upon it so as to be plainly visible the maximum permissible working pressure of the air receiver and the date on which it was last examined by an appointed examiner.

(3) Where the safety valve fitted on an air receiver in accordance with sub-paragraph (b) of paragraph (1) is not fitted directly to the air receiver, a suitable fusible plug shall also be fitted to the air receiver.

(4) For the purposes of those provisions of paragraphs (1) and (3) that relate to safety valves and pressure gauges, any set of air receivers supplied with air through a single pipe may be treated as one dir receiver:

Provided that, where, by virtue of the said paragraph (1), the air receiver is required to be fitted with a reducing valve or other appliance to prevent the maximum permissible working pressure of the air receiver being exceeded, this paragraph shall not apply unless such valve or other appliance is fitted on the said single pipe.

6. (1) Every pressure vessel shall- (c) be fitted with a pressure release valve;

(b) be placed in a metal tray or housed in a suitable structure so

that all valves and safety devices are readily accessible;

(c) where it has a maximum permissible working pressure of not more than seventy-five pounds per square inch, be fitted with piping properly secured along its whole length, save that for a length of two feet immediately preceding the burner the piping shall be in the form of a loose coil so as to facilitate easy manipulation; and

(d) be fitted with a remote control valve situated in a position as near to the burner as is possible consistently with its safe operation.

(2) The provisions of paragraph (1) shall apply to pressure vessels in addition to any of the provisions of regulation 5 that apply to such vessels.

PART 111.

AUXILIARY EQUIPMENT.

Special requireinents with respect to pressure vessels.

7. Every pump used in connexion with the fuel burning system Pumps,

in a fuel burning installation, whether the pump is used for the purpose

of supplying the burners or of transferring fuel, shall be separated from

any pump used for any other purpose and shall be provided with--

(a) an efficient escape valve, which shall discharge into the suction

side of the pump; and

(b) means for stopping the pump, which shall be situated outside

the boiler house in a readily accessible position.

8. (1) No means, other than steam or such other means as may Heaters.

be approved by the Principal Surveyor, shall be used for heating fuel in

a fuel burning installation.

(2) Every heater fitted in a fuel burning installation shall be of good design and adequate strength.

(3) Where, in any such heater, steam is used to heat the fuel and Us condensate is returned to the boiler in connexion with which the heater is provided, the heater shall be provided with an observation tank by means of which it can be readily ascertained whether or not the condensate is free from oil.