Hong Kong Regulations

DANGEROUS GOODS (GENERAL) REGULATIONS - REGULATION 66

Examination and testing of cylinders for permanent and liquefied gases

(1) No person shall use any cylinder, or cause or permit any cylinder to be
used, to contain any permanent or liquefied gas unless such cylinder has been
tested and examined within the preceding 5 years by a person approved by the
Authority for that purpose.

(2) Every cylinder shall be tested-

   (a)  in the case of a cylinder for any permanent gas-

        (i)    by hydraulic stretch test to a pressure of not less than 21
               MPa, and

        (ii)   by hydraulic pressure test to a pressure of not less than 20
               MPa;

   (b)  in the case of a cylinder for carbon dioxide, nitrous oxide, ethylene
        or monochlorotrifluoromethane (Arcton 13, Freon 13)-

        (i)    by hydraulic stretch test to a pressure of not less than 23
               MPa, and

        (ii)   by hydraulic pressure test to a pressure of not less than 21
               MPa;

   (c)  (Repealed 49 of 1990 s. 38)

   (d)  in the case of a cylinder for any liquefied gas, other than a gas
        mentioned in sub-paragraph (b), by hydraulic pressure test in each
        case to a pressure of not less than one and one-third times the
        working pressure, if any, specified in the third column of the table
        to regulation 70(2) for the gas for which such cylinder is intended;
        and (49 of 1990 s. 38)

   (e)  in the case of a cylinder in respect of which permission is granted by
        the Authority pursuant to the provisions of regulation 69 to exceed
        the filling pressures specified in that regulation, such hydraulic
        stretch test or hydraulic pressure test, or both, as the Authority may
        require either generally or in any particular case. (L.N. 119 of 1983)

(3) Prior to any test referred to in paragraph (2) the cylinder shall be
cleaned and examined externally and, so far as is practicable, internally for
the presence of surface defects, corrosion and foreign matter.

(4) Where excessive internal rust or foreign matter is observed the cylinder
shall not be refilled until such rust or foreign matter has been removed.

(5) After testing pursuant to the provisions of paragraph (1) and before
refilling, the cylinder shall be stamped in such manner as to indicate by whom
and on what date the testing was carried out and the pressures to which the
cylinder was subjected at each test performed.

(6) (Repealed 49 of 1990 s. 38)