Elliott E190, Руководство по эксплуатации и обслуживанию

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Synthetic Rope Usage EEC-0060 V1.2
Synthetic Rope Usage,
Inspection, and Retirement
found to be in good condition; and if the rope has not been subjected to dynamic loads,
excessive use, elevated temperatures, or extended periods under load.
For dynamic loading applications that involve severe exposure conditions, or for
recommendations on special applications, consult the manufacturer.
Firmness
Select ropes that are firm and round and hold their shape during use. Soft or
mushy ropes will snag easily and abrade quickly, causing accelerated strength loss.
Because the fibers are in a straighter line, which improves strength but compromises
durability, loose or mushy rope will almost always have higher break strengths than a
similar rope that is firm and holds its shape.
Abrasion
It is important to choose the right rope construction for your application, because
it affects resistance to normal wear and abrasion. Ropes can be severely damaged if
subjected to rough surfaces or sharp edges. Chocks, bits, winches, drums and other
surfaces must be kept in good condition and free of burrs and rust. Similarly, sheaves
must be free to rotate and should be of proper size to avoid excessive wear. Clamps
and similar devices will damage and weaken the rope, and should be used with extreme
caution. Do not drag the rope over rough ground. Dirt and grit picked up by the rope can
work into the strands, thus cutting the inside fibers and reducing the rope’s strength.
Assigned Working Load Factors
Assigned working load factors vary in accordance with the different safety
practices and policies of utilities and industrial users. However, our recommendation,
and one that is fairly well accepted in the industry, is a minimum 5:1 working load factor.
Thus, your maximum workload should be approximately 1/5
th
, or 20 percent, of the
quoted breaking strength. This factor provides greater safety and extends the service
life of the winch line.