Wire Rope Criteria For Removal

ASME B 30.9

9-2.9.5 Removal Criteria

A wire rope sling shall be removed from service if any of the following conditions are present:

a) Missing or illegible sling identification (see Section 9-2.7)

b) Broken wires

c) For strand-laid and single-part slings, 10 randomly distributed broken wires in one rope lay, or 5 broken wires in one strand in one rope lay (see Fig. 9-2.0-2)

d) For cable-laid slings, 20 broken wires per lay (see Fig. 9-2.9.5-1)

e) For less than eight-part braided slings, 20 broken wires per braid length (see Fig. 9-2.3.2-2)

f) For eight-part or more than eight-part braided slings, 40 broken wires per braid length (see Fig. 9-2.3.2-2)

g) Severe localized abrasion or scraping resulting in a reduction from nominal diameter of more than 5%

h) Kinking, crushing, birdcaging, or any other damage resulting in damage to the rope structure

i) Evidence of heat damage

j) Fittings that are cracked, deformed, or worn to the extent that the strength of the sling is substantially affected

k) Severe corrosion of the rope or fittings

l) For hooks, removable criteria as stated in ASME B30.10

m) For rigging hardware, removal criteria as stated in ASME B30.26

n) Other conditions, including visible damage, that cause doubt as to the continued use of the sling