Hong Kong Regulations

DANGEROUS GOODS (GENERAL) REGULATIONS - REGULATION 70

Filling of cylinders containing liquefied gases

(1) No person shall fill any cylinder, or cause or permit any cylinder to be
filled, with liquefied gas unless the cylinder has been rendered free from
moisture.

(2) No person shall fill any cylinder, or cause or permit any cylinder to be
filled, with any liquefied gas specified in the first column of the table to
this paragraph in excess of a quantity equivalent in weight to the number of
kilograms of water which the cylinder is capable of containing multiplied by
the filling ratio specified in the second column of the table for that gas.
(L.N. 88 of 1991)

TABLE

Gas

(1) Fillingratio

(2) Working
pressure
in kPa

(3) Ammonia, Anhydrous 0.51 2840 Butadiene 0.50 720 Carbon Dioxide (if the
cylinder is fitted with a bursting disc which will discharge the contents
before a pressure of 20 MPa is attained)

0.667

- Carbon Dioxide (except as specified above) 0.60 - Chlorine 1.19 1950
Chlorotrifluoromethane (Arcton 13, Freon 13) 0.90 - Cyclopropane 0.48 1875
Dichlorodifluoromethane (Arcton 12, Freon 12) 1.08 1585 Dichlorofluoromethane
(Arcton 21, Freon 21) 1.20 494 Dichlorotetrafluoroethane (Arcton 114, Freon
114) 1.26 556 Dimethylamine 0.44 607 Ethyl Chloride 0.79 415 Ethylene 0.27 -
Ethylene Oxide 0.76 530 Hydrocyanic Acid Gas (Stabilized) 0.57 275 Methyl
Bromide 1.39 700 Methyl Chloride 0.78 1430 Monochlorodifluoromethane (Arcton
22, Freon 22) 0.90 2620 Monomethylamine 0.54 1075 Nitrous Oxide (if impurities
present do not exceed 0.1%) 0.667 - Nitrous Oxide (except as specified above)
0.625 - Sulphur Dioxide 1.19 1160 Trichloromonofluoromethane (Arcton 11, Freon
11) 1.30 258 Trimethylamine 0.51 1075 Any other liquefied gas not above
specified, excepting liquefied air or oxygen or a gas which liquefies at
atmospheric pressure. As determined by the Authority. As determined by the
Authority. (L.N. 119 of 1983)

(3) (Repealed 49 of 1990 s. 38)