Safe_Design_Manufacture_Import_and_Supply_of_Plant.doc

715 mechanical or structural failure during operation

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7.15 Mechanical or structural failure during operation The various parts of plant and their linkages must be able to withstand the stresses to which they are subjected during intended use and reasonably foreseeable misuse. The durability of materials used to construct the plant must be adequate for the nature of the specified working environment. In particular, when nominating the type of materials to be used, you must consider the possible effects of fatigue, ageing, corrosion and abrasion. The design specification must indicate the type and frequency of inspection and maintenance required to keep the plant in a safe condition. The design specification must, where appropriate, also indicate the parts subjected to wear and the criteria for determining replacement. Where a risk of rupture or disintegration of component parts remains despite the measures taken, the parts concerned must be mounted, positioned and/or guarded in such a way that in case of rupture their fragments will not put the operator or others at risk. SAFE WORK AUSTRALIA MEMBERS’ MEETING 6 30 SEPTEMBER 2010 PAGE 44 OF 52
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Both rigid and flexible hoses/pipes carrying fluids such as gases or solids or a mixture of these, particularly those under high pressure, must be able to withstand the foreseen internal and external stresses and must be firmly attached and/or protected against those stresses. Precautions must be taken to make sure that there is no risk posed by rupture. Where material to be processed is automatically fed to moving parts of the plant, your design must include means to avoid risks to the operator and others which may arise from the material being ejected or being blocked in the moving parts of the plant. These means may include: allowing the moving parts to attain normal working condition before material comes into contact with the moving parts, and coordinating the feed movement of the material and the moving parts of the plant at all times including on start-up and shut-down regardless of whether the operation is intentional or unintentional. 7.16 Software Designers considering the use of interactive software to be used by the operator to command or control the operation of the plant should make sure that the software is as intuitive as possible and not require complex manipulation that could be affected by repetition or fatigue. 7.17 Lighting Lighting should be provided to enable safe use and operation of plant. Poor lighting can lead to poor visibility, operator fatigue, wrong decisions and accidents. For example if an operator is unable to clearly see a hopper capacity indicator, he or she may not empty it at the right time thus creating a dangerous situation. Emergency lighting should operate on its own power supply and not be subject to cuts in power.
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  • Fall '14
  • ........., Occupational safety and health

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