(a) the use of hoses in place of piping to carry or hold oxygen is kept to a minimum,

(b) hoses and fittings are constructed of material compatible with oxygen at the operating pressure and temperature,

(c) high flow velocities of oxygen through a hose are such that the differential pressure along a hose does not exceed 700 kPa,

(d) quick-opening valves are not used except for emergency shut-off at the point of penetration of a hyperbaric chamber hull, and

(e) portable compressed gas containers containing oxygen are stored, handled and used in accordance with sections 74 to 79.

(a) the use of hoses in place of piping to carry or hold oxygen is kept to a minimum,

(b) hoses and fittings are constructed of material compatible with oxygen at the operating pressure and temperature,

(c) high flow velocities of oxygen through a hose are such that the differential pressure along a hose does not exceed 700 kPa,

(d) quick-opening valves are not used except for emergency shut-off at the point of penetration of a hyperbaric chamber hull, and

(e) portable compressed gas containers containing oxygen are stored, handled and used in accordance with sections 74 to 79.