Regular inspection and maintenance of chain slings are critical to ensure their safe and reliable operation. Here are the key aspects of inspecting and maintaining chain slings:
Pre-Use Inspection: Before each use, visually inspect the chain sling for any signs of damage, wear, or deformation. Look for the following issues:
- Bent or twisted chain links
- Signs of excessive wear, such as elongation, thinning, or stretching of the links
- Cracks, nicks, or gouges on the chain links or attachments
- Damage to the attachments, such as bent hooks or distorted shackles
- Any missing or illegible identification markings or tags on the sling
If any of these issues are identified during the pre-use inspection, the chain sling should be taken out of service and not used until it has been repaired or replaced.
Periodic Inspections: Chain slings should undergo periodic thorough inspections performed by a competent person. The frequency of these inspections depends on the frequency of sling use and the working conditions, but a general guideline is to have them inspected at least annually or more frequently if required by regulations or industry standards.
During the periodic inspections, the competent person should examine the chain links, attachments, fittings, and other components in detail. They may also conduct non-destructive testing (NDT) methods, such as magnetic particle inspection or ultrasound testing, to detect hidden defects or cracks in the chain.
It is advisable to keep records of the periodic inspections, including the date of inspection, findings, and any necessary actions taken.
Maintenance: Proper maintenance of chain slings involves routine care and precautions to ensure their longevity and safe operation. Some maintenance practices include:
Cleaning: Clean the chain sling after use to remove dirt, debris, and contaminants. Use appropriate cleaning agents and brushes to clean the chain links and attachments.
Lubrication: Apply a suitable lubricant to the chain links and moving parts to reduce friction, prevent corrosion, and enhance the flexibility of the sling. Follow the manufacturer's recommendations for lubrication.
Storage: Store chain slings in a clean, dry, and well-ventilated area away from corrosive substances. Hang them or keep them on suitable racks to prevent tangling and damage.
Training and Education: Ensure that operators and personnel involved in the use of chain slings are properly trained on their inspection, maintenance, and safe handling procedures. They should be aware of the signs of damage or wear and know when to remove a sling from service.
Remember, if any doubts or concerns arise regarding the integrity of a chain sling, it is best to err on the side of caution and remove it from service until it has been thoroughly inspected or repaired by a qualified professional.