10 year

CRANE INSPECTIONS TO AUSTRALIAN STANDARDS

Current changes to the Australian Standards AS2550.1-2011 and AS2550.3-2002 relating to overhead cranes and hoists, have resulted in more frequent general service inspections and additional in-depth inspections to be carried out at specific intervals during the working life of the overhead crane.

These changes now require the inspections to be carried out as per the following extracts from AS2550.3-2002:

 
  • Routine Maintenance Service – Section 7.2.2
    Routine maintenance service shall be carried out at intervals not exceeding three (3) months apart, unless the crane is not in service.
  • Major Inspection of Mechanical Components for Assessment for Continued Safe Operation – Section 7.3.4 & 7.4.1
    This assessment should be carried out at 10 year intervals for the mechanical components – Please refer to the 10 year mechanical inspection requirements for further details.
  • Re-certification for Continued Safe Operation – Section 7.4.1
    This assessment should be carried out at 25 year intervals or where the crane has been subjected to an overload greater than 10% of the rated capacity for either or both the structure and hoist – Please refer to the 25 year Re-certification requirements for further details.
 

10 YEAR MECHANICAL INSPECTION REQUIREMENTS

The major requirement of this inspection is to assess the suitability for continued use of such mechanical components as:

 
  1. Removal and inspection of ropes, rope guides, frame and winch drum(s).
  2. Open inspection and NDT of drive gearbox components and shafts – with replacement of all bearings and seals recommended.
  3. Disassembly and inspection of brake assemblies including linings, drums, levers, pins and springs.
  4. Hooks, sheave blocks with bearing replacement after disassembly.
 

Other items to be visually inspected include:

 
  1. Wheels, rims, axles, wheel retaining mechanism, gears and pinions.
  2. Structural, mechanical, electrical, control and operating anomalies.
  3. Controls and emergency stop systems.
  4. Manufacturers' safety upgrades.
  5. Electrical equipment inspected for condition and compliance:
    a.    Switches and actuating devices, mains, isolating and crane switches, contactors and limit switches.
    b.    Supply busbars, insulators, current collectors and cabling.
    c.    Motors, brake release units, resistors, lighting, warning and signaling devices.
    d.    Electrical protection equipment and overload indicators.
 

These sections for major inspections are guide lines only, laid out in the Australian Standards and through consultation with NQC’S RPEQ certifying Engineer.

The final scope of work must however be assessed on an individual basis with such factors as condition, previous and expected duty cycle and working environment being taken into consideration

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