1962-HKRS28-8-29_Part03 — Page 4

Appointed cxaminer cxamining boiler, etc. under maximum Permissible working

pressure to set Kafety valve.

Transitional

provisions

AS TO

examination of stop valves of certain existing boilers.

Initial determination

of maximum permissible working

pressure of boilers and

pressure

reecivers.

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45. Whenever. for the purposes of this Ordinance, an appointed examiner is carrying out an examination of a boiler, steam receiver or air receiver under the pressure that will be specified in the certificate of fitness as its maximum permissible working pressure, he shall, by sealing or some other suitable method, ensure that the safety valve is so adjusted as to prevent the boiler, steam receiver or air receiver, as the case may be, from being operated at a pressure greater than that pressure.

46. (1) Where, for the purposes of this Ordinance, any range of existing boilers, being boilers that are used and operated for the purpose of a process requiring a continuous supply of steam, is being examined, any stop valve on the range that cannot be isolated from steam under pressure need be examined only so far as it is practicable to examine the same without its being so isolated.

(2) The provisions of subsection (1) shall apply to a range of existing boilers only until such time as a reasonable opportunity arises for installing devices to enable the valve to be isolated from steam under pressure,

PART VI.

INITIAL DETERMINATION OF MAXIMUM PERMISSIBLE WORKING PRESSURE OF BOILERS AND PRESSURD RECEIVERS.

47. (1) Where-

(a) an existing boiler or pressure receiver is being examined for

the purposes of section 23; or

(b) a new boiler or pressure receiver is being examined for the

purposes of section 24,

an appointed cxaminer shall determine the maximum permissible work- ing pressure at which, in his opinion, the boiler or pressure receiver, as the case may be, may be operated.

(2) Where, in accordance with the provisions of subsection (1), the maximum permissible working pressure of a boiler or pressure receiver has been determined, the appointed examiner who determined the same shall notify the Registrar thereof.

(3) The following provisions apply in relation to the determination under subsection (1) of the maximum permissible working pressure of a boiler or pressure receiver, namely-

(a) where, in the opinion of the appointed examiner who is deter- mining such pressure, it is necessary for him, in determining the same, to assess such pressure by calculation, the calculation shall be based on the formulae specified in the current British Standard Specification relating to boilers or pressure receivers. as the case may be, of the type or class in question, or, where,

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in relation to boilers or pressure receivers of the type or class in question, no formulae are so specified, on such formulae as the Principal Surveyor specifies;

(b) where the maximum permissible working pressure of a boiler or pressure receiver of unknown or uncertain origin or history has been assessed by calculation, the maximum permissible working pressure of the boiler or pressure receiver, when determined by the appointed examiner, shall not be greater than the pressure so assessed less ten per centum; and

(c) regard shall be had to the age of the boiler or pressure receiver, as the case may be, and to its general condition, its history and the quality of the workmanship used in its construction and in aoy repairs that have been carried out in respect thereof.

tion of

48. (1) (a) The owner of a boiler or pressure receiver who Appeals from

considers himself aggrieved by the decision of an appointed determina- examiner under section 47 as to the maximum permissible appointed working pressure at which the boiler or pressure receiver may examiner as be operated may, not later than seven days after he was notified to maxim of the decision, appeal to the Principal Surveyor.

(6) Every such appeal shall be in writing.

(2) When, upon such an appeal, the Principal Surveyor has deter- mined the maximum permissible working pressure at which, in his opinion, the boiler or pressure receiver, as the case may be, may be operated, he shall notify thercof the Registrar and the owner of the boiler or pressure receiver and, upon the delivery to him by the owner of the boiler or pressure receiver of the certificate of fitness, if any, issued after the examination, shall, where necessary, amend the certi- ficate so that it indicates the maximum permissible working pressure determined by him.

(3) The determination of the Principal Surveyor upon such an appeal shall be final.

(4) Where such an appeal has been made, the boiler or pressure receiver in question shall not, until the determination of the appeal, be operated at a pressure greater than the maximum permissible working pressure determined by the appointed examiner.

PART VII

OFFENCES AND PENALTIES.

permissible working pressure of boiler or pressure receiver.

49. (1) No boiler or pressure receiver, other than a pressure vessel. Offences in shall be used or operated, except for the purposes of this Ordinance by relation to use or under the direction of the Principal Surveyor or an appointed of boilers

and operation examiner, unless the boiler or pressure receiver and its auxiliary equip or pressure ment has beed" examined in accordance with this Ordinance and a receivers.