Safe_Design_Manufacture_Import_and_Supply_of_Plant.doc

Emergency stops do not remove the need for adequate

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The emergency stop system should be compatible with the operational characteristics of plant. Emergency stops do not remove the need for adequate guarding. Once engaged, the emergency stop controls should remain that way. It should be possible to disengage the emergency stop controls only by a deliberate action. Disengaging the emergency stop control should not restart the plant. It should only permit the normal starting sequence to be activated. In the case of plant or parts of plant designed to work together, stop controls (including the emergency stop) should be capable of stopping the plant itself as well as all the equipment interrelated to its operation, where continued operation of this interrelated equipment may be dangerous. 4.11 Failure of the control circuit A control circuit used to control the plant should be designed in such a way as to prevent a fault in the control circuit logic, or a failure of or damage to the control circuit leading to the operator or others being placed at risk. In particular: the plant must not start unexpectedly the plant must not be prevented from stopping if such a command has already been given no moving part of the plant or workpiece being held by the plant must fall or be ejected automatic or manual stopping of moving parts must not be impeded the protection device/s must remain fully effective. 4.12 Warning devices Warning devices include: Audible alarms Motion sensors Lights Rotary flashing lights Air horns Percussion alarms Radio sensing devices SAFE WORK AUSTRALIA MEMBERS’ MEETING 6 30 SEPTEMBER 2010 PAGE 30 OF 52 If it is necessary to include an emergency warning device to minimise risk, the designer of plant must ensure that the design provides for the device to be positioned on the plant so that it will work to best effect.
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5 MANUFACTURE OF PLANT 5.1 The role of manufacturers S. 23: Manufacturers must ensure, so far is reasonably practicable, that the plant is manufactured to be without risks to the health and safety of persons who assemble or use the plant for a purpose for which it was designed or manufactured, or store, decommission, dismantle or dispose of the plant. The manufacturer must use the design specifications provided by the designer. If the manufacturer identifies a hazard in the design for which the designer did not provide a control measure, the manufacturer must: not incorporate that hazard into the item of plant during manufacture give the designer written notice of the hazard as soon as practicable take all reasonable steps to consult with the designer of the plant in relation to alteration of the design to rectify the hazard. Consultation between manufacturer and designer will facilitate the discharge of each other’s obligations and any manufacturing issues to be discussed, e.g. practicalities of materials substitution in the manufacturing process.
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