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Amsteel-Blue Slings
       

 

 
Amsteel-Blue Inspection & Retirement

 Inspection & Retirement Checklist*

Any rope that has been in use for any period of time will show normal wear and tear. Some characteristics of a used rope will not reduce strength while others will. Below we have defined normal conditions that should be inspected on a regular basis.
If upon inspection you find any of these conditions, you must consider the following before deciding to repair or retire it.
  • the length of the rope
  • the time it has been in service
  • the type of work it does
  • where the damage is, and
  • the extent of the damage

In general, it is recommended to repair the rope if the observed damage is in localized areas, or retire the rope if the damage is over extended areas.
*REFERENCES Cordage Institute International, International Guideline C12001-04, Fiber-Rope Inspection and Retirement Criteria: Guidelines to Enhance Durability and the Safer Use of Rope, 2004

 

REDUCED VOLUME Retire or Repair
WHAT    > 25% reduction
CAUSE    > Abrasion
    > Sharp edges and surfaces
    > Cyclic tension wear
COMPRESSION Not a permanent characteristic MELTED OR GLAZED FIBER Retire or Repair
WHAT    > Visible Sheen
    > Stiffness that is reduced by flexing the rope
    > Not to be confused with melting
    > Often seen on winch drums
CAUSE    > Fiber Setting
CORRECTIVE ACTION
Flex the rope to remove compression as needed.
WHAT    > Fused fibers
    > Visibly charred and melted fibers yarns and/or strands
    > Extreme stiffness
    > Unchanged by flexing
CAUSE    > Exposure to excessive heat

 
PULLED STRAND Not a permanent characteristic DISCOLORATION Retire or Repair
WHAT    > Strand pulled away from the rest of the rope
    > Is not cut or otherwise damaged
CAUSE    > Snagging on equipment or surfaces
CORRECTIVE ACTION
Work loose strand back into the length of the rope

WHAT    > Fused fibers
    > Brittle fibers
    > Stiffness
CAUSE    > Chemical contamination


 

HEAVY TWIST Not a permanent characteristic INCONSISTENT DIAMETER Retire or Repair
WHAT    > The line of pics spiral around the circumference of the rope
CAUSE    > Not aligned during rigging - connection induced
CORRECTIVE ACTION
Remove lower rigging connection and straighten rope construction, reconnect and continue

WHAT    > Flat areas
    > Lumps & bumps
CAUSE    > Shock loading
    > Broken internal strands

 

 

 

INSPECTION PROCEDURES
Internal abrasion can be determined by pulling one strand away from the others and looking for powdered or broke fiber filaments (Fig. 1 and Fig. 2)

 
To determine the extent of outer fiber damage from abrasion, a single yarn in all abraded areas should be examined. The diameter of the abraded yard should then be compared to a portion of the same type that has been protected by the strand crossover area and is free from abrasion damage