SCHEDULE 4E+W+SGAS CONTAINERS

PART IE+W+S

Pressure gaugesE+W+S

7.  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.