Rope Replacement Base on ASME B30.8-2004 Page 16 as following: No precise rules can be given for determination of the exact time for rope replacement
(a) No precise rules can be given for determination of the exact time for rope replacement since many variable factors are involved. Once a rope reaches any one of the specified removal criteria, it may be allowed to operate to the end of the work shift, based on the judgment of a qualified person. The rope shall be replaced after that work shift, at the end of the day, or at the latest time prior to the equipment being used by the next work shift.
(b) Removal criteria for rope replacement shall be as follows:
(1) in running ropes, six randomly distributed broken wires in one lay, or three broken wires in one strand in one lay
(2) one outer wire broken at the contact point with the core of the rope, which has worked its way out of the rope structure and protrudes or loops out from the rope structure
(3) wear of one-third the original diameter of outside individual wires
(4) kinking, crushing, birdcaging, or any other damage resulting in distortion of the rope structure
(5) evidence of heat damage
(6) reductions from nominal diameter greater than those shown below:
(c) Broken wire removal criteria cited in this volume apply to wire rope operating on steel sheaves and drums. The user shall contact the sheave, drum, crane, or derrick manufacturer, or a qualified person, for broken wire removal criteria for wire ropes operating on sheaves and drums made of material other than steel.
(d) Replacement rope shall have strength rating at least as great as the original rope furnished by the crane manufacturer. Any deviation from the original size, grade, or construction shall be specified by the rope manufacturer, the crane manufacturer, or a qualified person. WIRE ROPE REPLACEMENT A wire rope sling shall be removed from service if conditions such as the following are present (see ASME B30.9-2003 page 19 for detail):
(A) missing or illegible sling identification (see Section 9-2.7)
(B) broken wires
(b1) for strand-laid and single-part slings, ten randomly distributed broken wires in one rope lay, or five broken wires in one strand in one rope lay (see Fig. 3)
(b2) for cable-laid slings, 20 broken wires per lay (see Fig. 8)
(b3) for six-part braided slings, 20 broken wires per braid (see Fig. 9)
(b4) for eight-part braided slings, 40 broken wires per braid (see Fig. 9)
(C) severe localized abrasion or scraping
(D) kinking, crushing, bird caging, or any other damage resulting in damage to the rope structure
(E) evidence of heat damage cf, end attachments that are cracked, deformed, or worn to the extent that the strength of the sling is substantially affected
(G) severe corrosion of the rope, end attachments, or fittings
(H) for hooks, removal criteria as stated in ASME B30.10
(I) other conditions, including visible damage, that cause doubt as to the continued use of the sling
RECOMMENDATION REPAIR
(a) Slings shall be repaired only by the sling manufacturer or a qualified person.(b) A repaired sling shall be marked to identify the
(c) End attachments and fittings used for sling repair
(d) Repair of hooks shall comply with ASME B30.10.
(e) The wire rope used in the sling shall not be cf, Repairs to wire rope slings shall be restricted to
(2) Modifications or alterations to end attachments repairing agency per Section 9-2.7. shall comply with the provisions of this Chapter. repaired. end attachments and fittings. or fittings shall be considered as repairs and shall conform to all other provisions of this Chapter.
(h) All repairs shall comply with the proof test requirements of Section 9-2.6.
