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Tài liệu đào tạo Lifting And Slinging Training

Thảo luận trong 'Máy nông nghiệp - Máy khác' bắt đầu bởi hyundai, 27/7/11.

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  1. hyundai
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    Bằng lái Hạng F
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    7/10/09
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    when taking a course as a'designated person for lifting operations I was horrified to reaise just how dngerous some of the operations I had been carrying out. This page demonstrates the lifting factors that you should be applying to lifting accessories
    Sling Angles

    [​IMG]


    The abve shows the loading in slings depending on the included angle. It can be seen that fitting too short a pair of slings and thereby creating too great an included angle can substantially increase the loading in the sling and cause it to fail
    You should not consider any lifting operation with an included angle greater than 90 degrees and then you should give a 1.5 factor for the slings i.e. the slings should be at least 0.75 tonne each to lift the 1 tonne weight Choking

    This effect also occurs when choking a sling
    [​IMG]


    Should the choke be batterned down it is possible to generate very high included angles severely straining the sling in this area and can easily lead to failure. Should it be necessary to put a wrap on a lift for security then you always consider making 2 full turns. If this is not possible then the included angle should never be reduced below 90 degrees and a 1.5 factor should be applied to the sling.
    [​IMG]

    Inspection Criteria

    Eyebolt(Dynamo)

    Check Code and SWL legible
    Ensure valid test certificate
    Check Threads for wear and distortion
    Ensure minimum 1.5 threads remaining when pin home
    Ensure wear less than 8%
    Ensure no nicks, cracks or distortions
    Remove corrosion and treat as wear
    Ensure no indication of heat damage or weld splatter

    Eyebolt(Shoulder)

    Check Code and SWL legible
    Ensure valid test certificate
    Check Threads for wear and distortion
    Ensure minimum 1.5 threads remaining when pin home
    Ensure wear less than 8%
    Ensure no nicks, cracks or distortions
    Remove corrosion and treat as wear
    Ensure no indication of heat damage or weld splatter

    Shackle (Dee)

    Check Code and SWL legible
    Ensure valid test certificate
    Check Threads for wear
    Ensure Pin correct for body, of the same material
    Ensure pin head shoulder is well seated
    Ensure minimum 1.5 threads remaining when pin home
    Ensure wear less than 8%
    Ensure no nicks, cracks or distortions
    Check shackle not opening up
    Remove corrosion and treat as wear
    Ensure no indication of heat damage or weld splatter

    Shackle (Bow)

    Check Code and SWL legible
    Ensure vald test certificate
    Check Threads for wear
    Ensure Pin correct for body, of the same material
    Ensure pin head shoulder is well seated
    Ensure minimum 1.5 threads remaining when pin home
    Ensure wear less than 8%
    Ensure no nicks, cracks or distortions
    Check shackle not opening up
    Remove corrosion and treat as wear
    Ensure no indication of heat damage or weld splatter

    Masterlink

    Check Code and SWL legible
    Ensure valid test certificate
    Ensure wear less than 8%
    Ensure no nicks, cracks or distortions
    Remove corrosion and treat as wear
    Ensure no indication of heat damage or weld splatter

    Padeye

    Check Code and SWL legible
    Ensure valid test certificate
    Ensure wear less than 8%
    Ensure no nicks, cracks or distortions
    Remove corrosion and treat as wear
    Remove paint and NDT test weld as required
    Ensure no indication of heat damage or weld splatter

    Sling(Chain)

    Check Code and SWL legible
    Ensure valid test certificate
    Ensure wear less than 8%
    Ensure stretch less than 5%
    Ensure Turn or twist a maximum 1/2 turn in 4 metres (hanging)
    Ensure no nicks, cracks or distortions
    Remove corrosion and treat as wear
    Ensure no indication of heat damage or weld splatter
    Ensure hooks are of the 'C' design or fitted with safety hook
    Ensure hook end is in align with shank
    Ensure hook throat opening has not increased by 15%
    Ensure hook throat shank wear less than 10%
    Ensure Clutch in good condition

    Sling(Wire)

    Check Code and SWL legible
    Ensure valid test certificate
    Ensure diameter consistent over length
    Ensure no more than 5% randomly broken wires in 10 rope diameters
    Ensure no more than 3 wires broken in local group in any one strand or 6 rope diameters
    Check external wear less than 10 & of nominal
    Remove corrosion and treat as wear
    Check for excessive waviness
    Check for strand protrusion
    Check for core protrusion
    Check for localised increase in core diameter due to core deterioration
    Check for localised reduction in diameter
    Check for memory kinks
    Check for flatterned portions
    Check integrity of eyes and fittings
    Check for heat distortion
    Check for pitting and prescence of weld splatter

    Sling(Web)

    Check Code and SWL legible
    Ensure valid certificate of compliance
    Check scuffing damage not excessive
    Check for chemical/contaminants damage
    Check for selvedge damage
    Check non load bearing outer sheaf of Round slings not broached
    Check for Heat and friction damage
    Check integrity of eyes and fittings
    Ensure less than 8 lines in 25mm damaged stitching
    Check for pitting and prescence of weld splatter

    Sling(Multileg)

    Check Code and SWL legible
    Ensure vald test certificate
    Ensure wear less than 8%
    Ensure stretch less than 5%
    Ensure Turn or twist a maximum 1/2 turn in 4 metres (hanging)
    Ensure no nicks, cracks or distortions
    Remove corrosion and treat as wear
    Ensure no indication of heat damage or weld splatter
    Ensure hooks are of the 'C' deisgn or fitted with safety hook
    Ensure hook end is in align with shank
    Ensure hook throat opening has not increased by 15%
    Ensure hook throat shank wear less than 10%
    Ensure Legs are of the same length
    Ensure Clutch in good condition

    Chain Block

    Check Code and SWL legible
    Ensure valid test certificate
    Degrease, disassemble and clean for inspection
    Ensure load Chain has wear less than 8%
    Ensure load Chain has stretch less than 5%
    Ensure load Chain has Turn or twist a maximum 1/2 turn in 4 metres (hanging)
    Ensure load Chain has no nicks, cracks or distortions
    Remove corrosion and treat as wear
    Ensure load Chain has no indication of heat damage or weld splatter
    Ensure hooks are of the 'C' design or fitted with safety hook
    Ensure hook end is in align with shank
    Ensure Gears in good condition
    Check chain attachements and Clevis pins
    Check bearings, pins rollers for distortion and wear
    Check pawl and ratchet for work and operation
    Ensure hook throat opening has not increased by 15%
    Ensure hook throat shank wear less than 10%

    Lever Hoist

    Check Code and SWL legible
    Ensure valid test certificate
    Degrease, disassemble and clean for inspection
    Ensure load Chain has wear less than 8%
    Ensure load Chain has stretch less than 5%
    Ensure load Chain has Turn or twist a maximum 1/2 turn in 4 metres (hanging)
    Ensure load Chain has no nicks, cracks or distortions
    Remove corrosion and treat as wear
    Ensure load Chain has no indication of heat damage or weld splatter
    Ensure hooks are of the 'C' design or fitted with safety hook
    Ensure hook end is in align with shank
    Ensure Gears in good condition
    Check chain attachements and Clevis pins
    Check bearings, pins rollers for distortion and wear
    Check pawl and ratchet for work and operation
    Ensure hook throat opening has not increased by 15%
    Ensure hook throat shank wear less than 10%

    Beam

    Check Code and SWL legible
    Ensure valid test certificate
    Check condition as required

    Other

    Check Code and SWL legible
    Ensure valid test certificate
    Check condition as required
     

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