Regulations > Pressure Equipment Regulations, 2009

(1)	Any user of pressure equipment shall cause such pressure equipment which for operational purposes is equipped with a quick-actuating opening, to be provided with an interlock or other effective means for preventing -

(a)	a rise of pressure inside the pressure equipment before the quick-actuating openings are in the fully closed and locked position; and

(b)	the release of the quick-actuating opening from the locked and closed position before the pressure inside the pressure equipment has been reduced to atmospheric pressure or the pressure across the openings has been equalised.

Occupational Health and Safety Act, 1993 (Act No. 85 of 1993)