[RIGGER’S CORNER] < Continued from page 83.
Recognizing UV Degradation in Web Slings When web slings are stiff and/or faded it is usually an indication of UV degradation. If the sling is constantly fuzzy throughout the length of the sling it is a clear indication of severe UV degradation.
Faded / Some > Orginal
T e following two nylon slings, EE2-603, were removed from service with no physical damage other than the slings being faded beyond color recognition and some fuzziness throughout the sling length. T e results of these two break tests were very revealing. T e age of the slings are not known, however, they are believed to have been purchased at the same time. Whether they were placed in service at the same time is also questionable. T e known factor is that they both looked the same and had no other damage other then fading beyond color recognition. T e test results were very diff erent. Test 483 and 484 show a loss of minimum breaking strength of 37% for one sling and 70% for the other. If your web slings are faded beyond color recognition, remove them from service. It is impossible to determine how much life is left in your sling.
CERTIFICATE OF TESTING
Customer: RiggSafe Solutions, Inc. P.O. Box 52003
Knoxville, TN 37950
25.04 22.00 20.00 18.00 16.00 14.00 12.00 10.00 8.00 6.00 4.00 2.00 -0.21
0 26 51 77 103 128 154 Operator: M. Riggs Material: EE2-602 Web Sling
Notes: UV Damage / Fuzzy - Minor Sags (Tested in Bastket)
Instrument Used: I & I 24 Basket Rated Capacity: 8,800 lbs
Minimum Breaking Strength: 44,000 lbs Actual Baseline Test Break: 27,790 lbs Loss of Strength from Minimum Brk: 37%
180 205 231 Test ID: 483
Test Date: 3/31/2012 2:05:15 PM Test ID: 00:03:50
Channel Peak Load
24.79
13.43 10.00 8.00 6.00 4.00 2.00 -0.18
0 11 23 34 46 57 68 Operator: M. Riggs Material: EE2-602 Web Sling
Notes: UV Damage / Fuzzy - LT (Tested in Bastket)
Instrument Used: I & I 24 Basket Rated Capacity: 8,800 lbs
Minimum Breaking Strength: 44,000 lbs Actual Baseline Test Break: 13,300 lbs Loss of Strength from Minimum Brk: 70%
Protecting Web Slings from UV Degradation We can protect or slow down the UV degradation process by having our slings fabricated with black buff er webbing throughout the slings length. Buff er webbing is normally applied to the sling when a sling needs to be protected from abrasion caused by rough loads. Web sling users would do well to consider adding buff er webbing to extend the slings safety and life due to UV degradation. Most webbing comes to the sling manufacturer as solution dyed webbing. In other words, a colored
dye with UV protection additives. A dark color on solution dyed webbing will only protect until the dye has been worn by abrasion, weathering or UV exposure. If the sling is manufactured from pigment dyed webbing, a dark color, such as black, will more positively protect the webbing from UV light, since pigment dye cannot be removed from abrasion or weathering. Remember, to keep safe, replace UV damaged slings and replace them with the best protection available against UV degradation. ❙
84 JULY-AUGUST 2012 WIRE ROPE EXCHANGE 80 91 102 CERTIFICATE OF TESTING
Customer: RiggSafe Solutions, Inc. P.O. Box 52003
Knoxville, TN 37950 Test ID: 484
Test Date: 3/31/2012 2:21:38 PM Test ID: 00:01:42
Channel Peak Load
13.30
lbs. x 1000
lbs. x 1000
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