SCHEDULE 4GAS CONTAINERS

PART I

Pressure gaugesI17

Every pressure gauge connected to a pressure pipe line shall be so constructed as not to be liable to deterioration under the action of the particular gases employed and shall be so constructed and fitted that—

a

in the event of failure of such pressure gauge no gas can escape into any part of the vehicle;

b

it is not possible owing to leakage of gas into the casing of the pressure gauge for pressure to increase therein to such extent as to be liable to cause a breakage of the glass thereof; and

c

in the event of failure of such pressure gauge the supply of gas thereto may be readily cut off.