Typical Steel Wire Rope Failures Steel wire rope is tough and durable, however eventually it will reach the end of its safe service life. Below are some examples of typical damage and deterioration. Steel wire ropes should be inspected every 12 months.
Storing Steel Wire Ropes Ensure steel wire rope is stored in a weather-proof storage space. If wire rope is to be kept unused for a considerable amount of time, it must be protected from the elements. The ideal storage area is a dry, well-ventilated building or shed. Avoid closed, unheated, tightly sealed buildings or enclosures because condensation will form when warm, moist outside (ambient) air envelopes the colder rope. Although wire rope is protected by a lubricant, this is not totally effective since condensation can still occur within the small sections between strands and wires, thereby causing corrosion problems. Ensure the reels are kept up off the ground, or are placed on a concrete floor. • Reels should be mounted on jacks or placed on a swift (with a brake arrangement) and care taken to see that the reel rotates as the rope unwinds • Ensure clearance for free rotation of the reel when the rope end is pulled and maintain continuous tension during haul off Correct Handling of Steel Wire Ropes Incorrect handling of steel wire ropes can cause kinking or loops Ropes should be stored in a clean dry place under cover. Reels or coils should be kept off the ground and supported by timber. They should also be examined periodically and rope dressing renewed as required. 1) Unreeling and Uncoiling Reels should be mounted on jacks and care taken to see that the reel rotates as the rope unwinds. Timber should be applied as a lever to one of the flanges to act as a brake, keeping the rope tight and preventing the reel from over- running. When the ropes are supplied in coils a turntalbe or swift should be employed and the free end pulled out with event tension as the swift, or turnatable revolve. Over-winding should be avoided at all times to obviate kinking. Coils may also be unwound by securing the free outside end of the rope and then rolling the coil along the ground; care being taken at all times to ensure that the coil is held firmly together, avoiding tight coils or kinks. Ropes should be stored in a clean dry place under cover. Reels or coils should be kept off the ground and supported by timber. They should also be examined periodically and rope dressing r newed as required. 1) Unreeling and Uncoiling Reels should be mounted on jacks and care taken to see that th reel ro ates as the rope unwinds. Timber should be applied as a lever t one of the flanges to act as a brake, keeping the rope tight and pr ve ting the reel from over- run ing. When the ropes are supplied in coils a turntalbe or swift should b employed and the fre end pulled out with vent tension as the swift, or turnatable revolve. Over-winding should be avoided t all times to obviate kinking. Coils may also be unwound by securing the free outside end of the rope and then rolling the coi along the ground; care being taken t all times to ensure that the coil is held firmly together, avoiding tight coils or kinks. Ropes should be stored in a clean ry lace under cove . R ls or coils shoul be k pt off the ground and supported by timber. They should also be examined periodically and rope dressing renewed as required. 1) Unreeling and Unc iling Re s should be mounted on jacks and c re taken to se that the reel r tates as the rope u winds. Timbe should be appl ed as a lever to one of the flanges to act as a brake, keeping the rope tight and preventing the reel from over- running. When the rope are supplied in coils a turntalbe or swift employed and the free end pulled out w th event tension as the swift, or tur atabl rev lve. Ov r-winding shoul be av ided at all t mes to obviate kinking. Coils may also be unwound by sec ing the fr e out id end of th rope and the rolling the c il along the ground; care being taken at all times to ensure that the coil is held firmly together, avoiding tight coils or kinks. Ropes should be stored in a clean dry place under cover. Reels or coils should be kept off the ground and supported by timber. They should also be examined periodically and rope dressing renewed a required. 1) Unreeling and Uncoiling Reels should be mounted on jacks and care taken to see that the reel rotates as the rope unwinds. Timber should be applied as a lever to one of the flanges to act as a brake, keeping the rope tight and preventing the reel from over- running. When the ropes are supplied in coils a turntalbe or swift should be employed and the free end pulled out with event tension as the swift, or turnatable revolve. Over-winding should be avoided at all times to obviate kinking. Coils may also be unwound by securing the free outside end of the rope and then rolling the coil along the ground; care being taken at all times to ensure that the coil is held firmly together, avoiding tight coils or kinks. Ropes should be stored in a clean dry place under cove . R els or coils should be k pt off the ground and supported by timber. They should also be xamined p riodically and rope dressing renewed as required. 1) Unreeling and U c iling Reels should be mounted on jacks and care taken to see that the reel tates as the rope u winds. Timb r should be appl ed as a lev r to ne of the flanges to act as a brake, keeping the rope tight and prev nti g the reel from over- running. When the rope are supplied in coils a turntalbe or swift empl y d and the free end pull d out with event tensi n as the swift, or t r at ble rev lve. Ov r-winding sh uld be avoided at all times to bviate kinki g. Coils may also be unwound by securing the free out id nd of the rop and then rollin the coil a ong the ground; care being taken at ll times to ensure that the coil is held firmly together, avoiding tight coils or kinks. forming in the steel wire rope, causing permanent damage. Below is a summary of the correct way to handle steel wire rope:
Although the steel wire rope is lubricated at the time of manufacture, a suitable lubricant should be applied every three months. The reels containing the steel wire ropes should also be rotated 90 degrees every three months.
Fatigue Failure
Thermal Damage
Shock Loading
11. Handling and Care of Wire Ropes 1. Handling and Care of Wire Ropes 11. Handling and Care of Wire Ropes 11. Handling and Care of Wire Ropes 1 . Handling and Care of Wire Rop s
• Over-winding should be avoided at all times to eliminate kinking • Always prevent crossing the rope laps on the wheel.
Abrasion
Birdcage (due to torsional unbalance)
Termination Failure
METHOD OF UNCOILING SMALL COIL METHOD OF UNCOILING SMALL COIL METHOD OF UNCOILING SMALL COIL METHOD OF UNCOILING SMALL COIL METHOD OF UNCOIL NG SMALL COIL Method of uncoiling small coil
METHOD OF UNCOILING LARGE COILS METHOD OF UNCO LING LARGE COILS METHOD OF UNCOILING LARGE COILS METHOD OF UNCOILING LARGE COILS METHOD OF UNCOIL NG LARGE COILS Method of uncoiling large coils
Corrosion (due to immersion in water)
CORRECT COR ECT Correct
CO RECT CORRECT CORRECT
CORRECT COR ECT
CO RECT CORRECT CORRECT Correct
INCORRECT INCORRECT ncorrect INCO RECT INCORRECT INCORRECT
INCORRECT INCOR ECT
INCO RECT INCORRECT INCORRECT Incorrect
CORRECT COR ECT
CO RECT CORRECT CORRECT orrect
2) Seizings It is important that before cutting ropes are properly seized with annealed mild steel wire or strand to avoid slack wires and possible rope distortion. 2) Se zings It s important that before cutting ropes are properly s ized with annealed mild steel wire or strand to avoid slack wires and possible rope distortion. 2) Seizings It is important that bef re cutting ropes are properly seized with annealed mild steel wire or strand to avoid slack wires and possible rope distortion. 2) Seizings It is important that before cutting ropes are properly seized with annealed mild steel wire or strand to avoid slack wires and possible rope distortion. 2) Seiz ngs It is important that before cutting ropes are properly seized with annealed mild steel wire or strand to avoid slack wires and possible rope distortion.
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