Wire rope slings are essential tools for lifting and moving heavy loads. However, they can also be dangerous if not used and maintained properly. That's why it's essential to inspect and test wire rope slings regularly according to the guidelines outlined in ASME B30.9, the American National Standard for the Design, Fabrication, Care, and Use of Slings.
Wire rope slings are subject to various stresses during use, including bending, twisting, and shock loading. These stresses can cause the wire rope to weaken and eventually fail. By inspecting and testing wire rope slings regularly, you can help to identify any potential problems before they lead to failure.
The requirements of ASME B30.9 for inspecting and testing wire rope slings
Three main types of inspections can be performed on wire rope slings:
The frequency of inspections for wire rope slings depends on the type of sling and the environment in which it is used. However, ASME B30.9 specifies that visual inspections should be performed whenever a wire rope sling is used. Functional tests should be performed every 12 months, and load tests should be performed every five years.
A qualified person should perform a visual inspection of a wire rope sling. The inspector should look for any of the following signs of damage:
If any signs of damage are found, the sling should be removed from service and replaced.
A qualified person should perform a functional test of a wire rope sling. The test should involve loading the sling to its rated capacity and observing it for any signs of failure. The following steps should be followed when performing a functional test:
If any signs of failure are found during the functional test, the sling should be removed from service and replaced.
A qualified person should perform a load test of a wire rope sling. The test should involve loading the sling to its rated capacity plus 25% and observing it for any signs of failure. The following steps should be followed when performing a load test:
If any signs of failure are found during the load test, the sling should be removed from service and replaced.
Following the guidelines outlined in ASME B30.9, you can help ensure your wire rope sling.