Care and Maintenance of RUD chain slings

Care

1. Store Chain Slings on A frames or wall racks in a clean dry place.

2. Keep a record of all chain slings in use.

3. Lightly oil chains before prolonged storage.

4. Never weld or heat treat alloy chain slings.

Use- Pre Lifting Checks.

1. Always visually inspect that a chain sling is free from damage or wear before use.

2. Never load in excess of the rated capacity for the application.

3. If identification tag is lost, damaged or un-readable, then chains should be removed from service and replaced after chain inspection.

4. Ensure the weight of the load is known and evenly distributed when using multi leg slings.

Do not use if links are damaged

IMPORTANT: The number of bearing legs in multi leg slings should be calculated as follows.

	Symmetrical lifting	Unsymmetrical lifting
Two Leg Slings	2 load bearing legs	1 load bearing leg
Three or Four Leg Slings	3 load bearing legs	2 load bearing legs

5. Shorten chain legs with the shortening hooks.

6. Ensure the chain is free of twists before lifting and is protected from any sharp corners on the load.

7. Never tie a knot in the chain.

Use- During Lifting

8. Avoid shock loading - Commence the lift slowly. Take up the weight gradually by avoiding sharp movements.

9. When lowering, avoid the possibility of crushing the chain by ensuring the load does not land on it. Use sufficient packaging and timber, etc.

10. For operation at high temperatures, apply the following duration for chains to the Working Load Limit (WLL)

Temperature °C	-10 < to +200	Over 200 to 300	Over 300 to 400
Deration	none	10%	25%

11. For RUD VIP chain, the powder coating changes its colour with temperatures exceeding 200°C.

Chains should not be used after being subjected to temperatures exceeding 400°C. At this temperature, the VIP changes colour to a deep black with small bubbles indicating that it has been overheated.

Inspection and Maintenance.

1. Periodic examination is required at least every 6 months.

2. Clean the chain thoroughly.

3. Every chain sling should have an identification tag which states the safe working load (SWL) or Working Load Limit (WLL) of the sling.

4. Lay the chain on a clean surface or hang it up in a well lit area.

5. Every chain link should be individually inspected for any signs of wear, twisting, stretching, nicks, gouging and any worn link measured to determine the degree of wear using vernier calipers.

10% maximum loss of cross section is permissible

6. Accessories - Lifting hooks must be replaced when

the opening of the mouth is deformed more than 10%
if hook looks worn more than 5%
Shows signs of deep notches

7. Chain couplings should be inspected for signs of wear or heat at the loading points, for excessive play in the pins and for impaired rotation of the body halves around the load pin.

8. Chain links or fittings having any defects should be clearly marked to indicate rejection and the chain sling withdrawn from service until properly repaired by a competent person.