Hong Kong Regulations

DANGEROUS GOODS (GENERAL) REGULATIONS - REGULATION 74

General provisions relating to storage, etc.

(1) Section 6 of the Ordinance shall not apply to the storage or conveyance of
any gas specified in the first column of the table to this regulation in any
quantity not exceeding that, if any, specified for such gas in the second
column of the table: (L.N. 71 of 1964) Provided that this paragraph shall not
apply where the aggregate of the quantities of all such gases stored in the
same store exceeds 5 cylinders or 25 L of gases where 1 cylinder is deemed to
be equivalent to 5 L.

(2) No person shall use any cylinder to contain any gas specified in the first
column of the table to this regulation or store or convey any such gas in any
cylinder unless the cylinder bears the label or labels prescribed in the First
Schedule indicated by the letter or letters appearing in the third column of
the table to this regulation opposite the name of such gas, subject to such
variation in size and shape as the Authority may approve.

(3) No cylinder containing any gas specified in the first column of the table
to this regulation shall be stored together with any goods other than
dangerous goods in category 2: Provided that nothing in this paragraph shall
apply to the storage of any gas in any quantity not exceeding that specified
in the second column of the table.

(4) No person shall store, or cause or permit to be stored, any cylinder
containing any gas specified in the first column of the table to this
regulation-

   (a)  otherwise than in a cool place and protected from the direct rays of
        the sun or other direct source of heat;

   (b)  above or nearer than 600 mm from any gas or other burner, whether
        connected therewith or not;

   (c)  except when stored under licence in accordance with the provisions of
        the Ordinance and these regulations otherwise than resting on the
        floor of any premises or on the ground or on a stand constructed to
        the satisfaction of the Authority and resting on the floor or on the
        ground;

   (d)  in any common passageway, stairway or doorway;

   (e)  below ground level, except with the permission in writing of the
        Authority; or

   (f)  in any place which is not provided with adequate low level
        ventilation. (L.N. 119 of 1983)

TABLE

Note: In this table quantities of gas expressed in litres refer to the
measurement of the gas in a liquid state.

Gas

(1) Quantity for which licence not required

(2) Label

(3)

Class 1-Permanent gases Air 2 cylinders Argon 1 cylinder Boron Trifluoride D1
Carbon Monoxide B3 and D1 Coal Gas B3 and D1 Fluorine D1 Helium 1 cylinder
Hydrogen 1 cylinder B3 Krypton 1 cylinder Methane 1 cylinder B3 Neon 1
cylinder Nitrogen 1 cylinder Oxygen 2 cylinders

Class 2-Liquefied gases Air, liquid 25 L Ammonia, Anhydrous 1 cylinder D1
Boron Trichloride Butadiene 1 cylinder B3 Carbon Dioxide 1 cylinder
(unlimited when intended for use with fire extinguishers) Chlorine D1
Chlorotrifluoromethane (Arcton 13, Freon 13) 2 cylinders Cyanogen B3 and D1
Cyclopropane 1 cylinder B3 Dichlorodifluoromethane (Arcton 12, Freon 12) 2
cylinders Dichlorodifluoromethane/Trichlorofluoromethane Mixtures (Arcton
12/11, Freon 12/11) 2 cylinders Dichlorofluoromethane (Arcton 21, Freon 21) 2
cylinders Dichlorotetrafluoroethane (Arcton 114, Freon 114) 2 cylinders
Dimethyl Ether B3 Dimethylamine B3 Ethane B3 Ethyl Chloride 1 cylinder or 10
kg B3 Ethylene 1 cylinder B3 Ethylene Oxide 1 cylinder or 10 kg B3 Ethylene
Oxide

(in a concentration not greater than 12% by weight) mixed with an inactive
carrier gas (such as dichlorodifluoromethane) Hydrogen Cyanide (Hydrocyanic
Acid) D Hydrogen Chloride (Hydrochloric Acid, Anhydrous) Hydrogen Fluoride
(Hydrofluoric Acid, Anhydrous) D1 Hydrogen Sulphide (Sulphuretted Hydrogen) B3
and D1 Methyl Bromide 1 cylinder or 25 kg Methyl Chloride 1 cylinder B3
Monochlorodifluoromethane (Arcton 22, Freon 22) 2 cylinders Monomethylamine B3
Nitrogen (liquid) 2 cylinders Nitrogen Tetroxide (Nitrogen Peroxide) D1
Nitrosyl Chloride D1 Nitrous Oxide 2 cylinders Oxygen, Liquid 10 L Phosgene D1
Propylene 1 cylinder B3 Sulphur Dioxide 1 cylinder or 25 kg
Trichloromonofluoromethane (Arcton 11, Freon 11) 2 cylinders Trimethylamine B3
Any other liquefied gas As may be directed by the Authority in each case.

Class 3-Dissolved gases Acetylene 2 cylinders B3 (L.N. 40 of 1973; L.N. 119 of
1983; 49 of 1990 s. 38)