Inspection of Wire Ropes - Bridon

1 Inspection of wire Ropes HIGH PERFORMANCE wire Ropes INTRODUCTION The periodic Inspection must cover the surface of Rotation Resistant Ropes , the retirement of the entire rope length and no attempt should criteria is 2 wire breaks in 6 rope diameters or The most important aspect of operating a rope be made to open the rope . In addition to common 4 wire breaks on 30 rope diameters ( 6 rope ENDURANCE DYFORM 34LR/XL/MAX safely is regular proper Inspection . ASME crane repetitive wear sections checked during the diameters in a 1 rope is 6 ) (d) One broken outer Best combination of strength, rotation resistance, crush resistance and bendi fatigue in the rotation resistant product range safety standards such as and frequent Inspection , additional sections prone wire at the contact point with the core which has Strongest of all Ropes in the rotation resistant product range confirmed by Bridon 's Powerchecked testing of a sample from each production length.

2 Provide detailed Inspection procedures and to rapid deterioration such as the following need worked its way out of the rope structure and Greatest resistance to rotation of all Ropes in the rotation resistant product range - confirmed by Bridon 's unique Twistchecked type testing program. retirement criteria. Both standards specify special attention. protrudes, loops out or is slightly raised from the that all running Ropes in service should be body of the rope Superior bending fatigue life when compared with conventional rotation resistant Ropes - confirmed by laboratory testing and extensive field experience visually inspected once each working day and (1) Locations where rope vibrations are damped, Excellent resistance to crushing and abrasion resulting from the overall compactness and robustness of the rope and the Dyform strands -recommended shall consist of observation of all rope that can such as the following: sections in contact with Note.

3 Broken wire removal criteria cited in this when multi-layer spooling is involved reasonably be expected to be in use during equalizer sheaves, or other sheaves where volume apply to wire rope operating on steel Reduced elongation results from increased steel content and the Dyform process operations on that day. The Inspection must be rope travel is limited; sections of the rope at sheaves and drums and wire rope operating on more than just a quick look. It needs to be done or near end connections where corroded or multilayer drums regardless of sheave material. Dimensional stability carefully and in enough light to find damage or broken wires may protrude; bridle reeving in the Due to the difficulty in detecting wire breaks when Optional plastic coating (PI) of IWRC to further extend fatigue life, improve structural stability and resistance to corrosion broken wires that may require the rope to be boom hoist Ropes ; repetitive pickup points and polymer are utilized with single layer drums, the taken out of service.

4 It must also be remembered crossover and change of layer points at flanges user should contact the sheave manufacturer for ENDURANCE DYFORM 28 HML/ MAX that a dirty or greasy rope is almost impossible on drums; fleeting or deflector sheaves. broken wire removal criteria. Provides up to 20% greater fatigue performance when compared with conventional multistrand Ropes to inspect properly, as dirt and grease may hide problem areas. The individual making the In addition to the specific types of damage Reductions from nominal diameter greater than Strongest of all Ropes in the rotation resistant product range confirmed by Bridon 's Powerchecked testing of a sample from each production length listed in the frequent Inspection section, 5% (Minimum Value = Nominal Diameter x.)

5 95). Inspection should be familiar with the machine, Greatest resistance to rotation of all Ropes in the rotation resistant product range - confirmed by Bridon 's unique Twistchecked type testing program the wire rope , and that particular application. these additional items need to be addressed: Measuring the rope diameter in numerous Distortion of rope structure: (a) Damage resulting Superior bending fatigue life when compared with conventional rotation resistant Ropes - confirmed by laboratory testing and extensive field experience The B30 standards provide information on both in distortion of the rope structure ( , kinking, a frequent Inspection to be done daily and a locations to assess uniform loss of diameter Excellent resistance to crushing and abrasion resulting from the overall compactness and robustness of the rope and the Dyform strands -recommended along the entire length of rope .

6 Close visual birdcaging, crushing) (b) Steel core protrusion when multi-layer spooling is involved much more detailed periodic Inspection that is between the outer strands (c) Localized change done on a weekly or monthly basis. observation of the entire length to identify;. Reduced elongation results from increased steel content and the Dyform process lengthening of lay in localized areas; diameter in lay length (d) Changes in original geometry FREQUENT Inspection reduction in localized areas; distortion of rope due to crushing forces where the diameter Dimensional stability across the distorted section is 5/6 of the nominal structure (kinking, birdcaging, crushing); steel As stated previously, all running Ropes in core protrusion between the outer strands; diameter.

7 ENDURANCE DYFORM 18/PI service should be visually inspected once each internal corrosion; wear of outside wires; more (4) Waviness (corkscrew effect) in the rope that High strength rotation resistant rope incorporating Dyform strands- confirmed by Bridon 's Powercheck testing of a sample from each production length. working day and shall consist of observation detailed Inspection of end connections for causes overall diameter to increase to a value Good resistance to rotation - confirmed by Bridon 's unique Twistchecked type testing program of all rope that can reasonably be expected to broken wires and corrosion; severely corroded, greater than 110% of nominal rope diameter. Superior bending fatigue life when compared with conventional multistrand Ropes - confirmed by laboratory testing and extensive field experience.

8 Be in use during operations on that day. The cracked, bent, worn or improperly applied end (5) A high or low strand that is higher or lower inspector should know where and how rope on connections; waviness (corkscrew effect) of than of the strand diameter above or below the Excellent resistance to crushing and abrasion resulting from the overall compactness and robustness of the rope and the the particular application wears out so that the rope ; high or low strand. surface of the rope . Dyform strands are recommended when multi-layer spooling is involved daily Inspection can be focused on the known (6) Any apparent damage from a heat source Optional plastic coating (PI) of IWRC to further extend fatigue life, improved structural stability and resistance to corrosion wear areas.

9 Special care should always be To establish data as a basis for judging the including, but not limited to welding, power line taken when inspecting common repetitive wear proper time for replacement, a dated report of strikes, or lightning. ENDURANCE DYFORM 6/PI sections such as: rope condition at each periodic Inspection must (7) Widespread or localized external corrosion as Strongest of all Ropes in the six strand product range-confirmed by Bridon 's Powerchecked testing of a sample from each production length be kept on file. This report shall cover points of evidenced by pitting, and obvious signs of internal Flange step up, cross over points and repetitive deterioration listed above. If the rope is replaced, Superior bending fatigue life when compared with conventional six strand Ropes - confirmed by laboratory testing and extensive field experience pick up on the drum; areas of the rope operating corrosion such as magnetic debris coming from only the fact that the rope was replaced need be valleys.

10 Excellent resistance to crushing and abrasion resulting from the overall compactness and robustness of the rope and the Dyform strands - recommended through a reverse bend in the reeving system, recorded. equalizer sheaves, and end connections. (8) Severely corroded, cracked, bent, worn, when multi-layer spooling is involved grossly damaged, or improperly installed end Certain types of Ropes and applications require Reduced elongation results from increased steel content and the Dyform process The inspector should be concerned with special attention and require reduced time connections Optional plastic coating (PI) of IWRC to further extend fatigue life, improved structural stability and resistance to corrosion discovering gross damage that may be an intervals between periodic inspections: Note: Consult the latest edition of the ASME B30.