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MAN-MADE FIBRE ROPES, handling, care & maintenance, part 1

MAN-MADE FIBRE ROPES, HANDLING, CARE AND MAINTENANCE. PART 1

DO'S & DON'TS , the essentials:

Never drag fibre ropes over sharp or rough edges                                                                                           

All metal parts should be smooth and chaffing points protected by a sleeve, often leather, canves or plastic

Avoid contamination by chemicals or fumes, if suspected wash man-made fibre ropes in cold running water.

Avoid heat exposure, and unnecessary exposure to degrading sunlight

Avoid excessive build-up of excessive turn in fibre ropes, if this occurs, loops will form, and if loaded, strand distortion and loss of strength will result, work excessive twist over end of rope before straining.

Never couple a left hand lay rope to a right hand lay rope.

If rope is on a reel, mount on trestles and draw rope from under the reel, not over the top.Or anti-clockwise.

ROUTINE INSPECTION

It is worthwhile inspecting fibre ropes on a regular basis, so that the life of the rope can be extended greatly by proper care and repair, and protection at chaffing points.

Inspecting areas of about 300mm at a time is recommended, the rope being turned to see all sides, at the same intervals the strand should be opened as in splicing, but only just enough to allow examination of the inside surfaces.

DAMAGE DUE TO EXTERNAL WEAR

This is the most noticeable cause of weakness, especially if an unused rope is available for comparison.

In the extreme the strands become so worn that their outer faces are flattened and the outer yarns severed. Assesment of the degree of wear is by observation of the number of severed yarns, and the thickness relationship of the unsevered yarns at the abraded and unabraded sections.

A tensile strength will remove any doubts about the fibre ropes condition.

DAMAGE DUE TO LOCAL ABRASION.

This may be caused by the passage of the fibre rope over sharp edges while under tension, with damage resulting in serious strength losses, especially if a deep score is made in the rope.

A deep score extending over 10 lays or more of the rope can mean that every out yarn is damaged or cut. These may cause internal, as well as external damage and are not indicated by local rupturing or loosening of the yarns or strands.

NEXT WEEK: INTERNAL WEAR, OVERLOADING, CHEMICAL ATTACK, ATTACK BY HEAT, SAFETY TIPS AND MAINTENANCE AFTER INSPECTION.

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