18.8.1 Marking
The necessary marking should be made in such a way that it is not harmful to the sling. One suitable method is to apply the marking to a plastic sleeve which may be fitted over the rope during the sling manufacture and then shrunk to it. Sleeves should be of the following colours, which indicate the material from which the sling is made:
Green Polyamide [nylon]
Blue Polyester
Red/brown Polypropylene
White Sisal/manila/hemp
A further, clear plastic, sleeve may also be fitted over the marked sleeve protecting it from soiling.
Slings which incorporate a link should be marked on one leg as above or on a suitable tag permanently attached to it.
Marking the link is acceptable providing that the mechanical properties of the link are not impaired. If the latter option is adopted, care must be taken to ensure the tag is such that it cannot become trapped by the sling thereby damaging the sling.
In addition to the information required by the national legislation and the standard being worked to, the marking should indicate the following minimum information:
SWL in straight pull or for the appropriate range of angles in the case of multi-leg slings.
Distinguishing mark. (If the manufacturer has not provided a unique serial number then it is the responsibility of the user to add the identification mark to identify the equipment with the inspection and examination reports).
Material identification.
Name and address of manufacturer
year of manufacture
Additional marking may be added to indicate the maximum load that may be lifted for the various modes of use. Care must be taken to ensure such marking is not ambiguous or confusing.