Redundant and self-monitoring fault detection systems. Redundant or dual systems (doubling up) and self-monitoring fault detection systems are also effective methods to prevent failure of critical safety systems. Selection and installation of these types of complex interactive control measures may require expert or specialist assistance.
When thinking about safe access to machinery and equipment, consider the following: • who will be working on or around the machinery and equipment • people who are required to work in enclosed areas where the atmosphere could be harmful, such as pits, tanks or storage vessels • what equipment or materials need to be carried to undertake the task • where and when is access required for operation, maintenance and cleaning • how will people gain safe access (walkway, gantry, elevated work platform or ladder) • what work will be carried out during access • will people be near or exposed to an unidentified mechanical or non-mechanical hazard at the time of access • has consultation occurred with workers or contractors regarding how they intend to gain access, and what equipment and work platform or structure is best suited for the intended task.
Personal protective equipment. Where it is not possible for emissions to be controlled at their source, or removed or reduced through effective ventilation, extraction or diversion, the use of personal protective equipment (PPE) as a final measure must be considered to ensure safety. PPE is a lower order control and can only be used where higher order controls are not possible or are not totally effective.
Access may vary during each stage of the machinery and equipment life cycle. For example: • installation or removal o complete access from every area may be required and involve disconnection or connection of services, such as water, air, pipes, installation of electrical cable to switch board • operation o access for set up, operation and adjustment • maintenance, repair, cleaning, alteration or adaptation o access to remote areas may be required.