Hong Kong Regulations

FACTORIES AND INDUSTRIAL UNDERTAKINGS (WORK IN COMPRESSED AIR) REGULATIONS - SCHEDULE 2

COMPRESSION PROCEDURE

[regulations 8 & 11(1)]

(Regulation 11(1))

The procedure for the compression of persons shall be as follows-

(1) The pressure shall not, in the first minute after starting compression, be
increased to more than 5 pounds per square inch.

(2) When the pressure referred to in sub-paragraph (1) is reached, the
pressure shall not be further increased until after the lapse of a period
sufficiently long to enable the lock attendant to discover whether or not any
person in the man-lock complains of discomfort.

(3) After the lapse of the period referred to in sub-paragraph (2), the
pressure shall be increased at a rate not faster than 10 pounds per square
inch per minute.

(4) Subject to sub-paragraphs (1), (2) and (3), the pressure shall be
increased gradually so as to ensure as far as possible that no person in the
man-lock suffers discomfort.

(5) If any person in the man-lock complains of discomfort during compression,
that compression shall be stopped immediately. If the discomfort does not
cease quickly the pressure shall be gradually decreased. If the discomfort
does not cease during decompression, the person concerned shall be released
from the man-lock when atmospheric pressure is reached and required to report
to the medical lock attendant.