Crane wire rope discard criteria

Crane wire rope discard criteria

" Hoist equipment  safety regulations" on the rope scrap regulations:
Rope is scrapped, mainly based on degree of broken wire rope and some other conditions:
     
    1  wire rope  twist pitch in a number of broken wires within the total number of wire rope up to 10%. Such as rope 6 × 19 = 114 wire, broken wire when the wire when the number of 12 should be scrapped updates, such as rope 6 × 37 = 222 wire, broken wire when the wire when the number reached 22 should be scrapped update. Composed by the thickness of the wire for wire rope, broken wire filaments of a calculation of the number is considered a coarse wire one count 1.7.
     
    2 radial wear or corrosion of steel more than 40% of the original diameter should be scrapped, while less than 40%, the number of broken wires can be provided for reduction scrapped.
     
    3 lift hoist  lifting hot metal or dangerous goods, scrap wire rope number of general crane wire rope take half the number of scrapped
     
    4 For meet ISO2408 (General Purpose Wire Rope Characteristics "specified in the standard structure of wire rope, broken wires should be scrapped GB5972-86 in a predetermined number executed.
     
    5 whole strand breaks should be scrapped.
     
    6, when the nominal  Wire rope  iameter of the reduced diameter with respect to 7% or more, even if not found broken wire, the wire should be scrapped.
     
    7 Ma ferrule should be scrapped.
     
    8  rope   obvious corrosion should be scrapped.
     
    9 showed a partial outer cage wire elongation status should be scrapped
     
    10 an 86 in the control wire GB5972 possible typical example, the same damage to the figure should be scrapped.