Crane Rope Inspection and Discard – Magnetic Rope Testing Barrie Mordue – Tensology Ltd
Crane Rope Inspection and Discard – Magnetic Rope Testing
Barrie Mordue – Tensology Ltd
Why MRT?
• Signature trace • Internal inspection • External inspection (lubrication, dirt) • Full length of rope • Quantitative results (LMA) • Permanent record/off-line analysis • Legislation
Traditional internal
examination
Traditional internal
examination Plastic impregnated or PFV ropes
Traditional external
examination
New/lightly lubricated ropes
Used/Heavily lubricated ropes
Traditional external
examination
Magnetic Rope Testing
Magnetic Rope Testing
Powerful permanent magnet
High accuracy sensors
Dual function, simultaneously detect LF and LMA
Length measurement
Analysis and
interpretation of results
Real time viewing
Output traces
LF trace, mV
171615141312
40.0
30.0
20.0
10.0
0.0
-10.0
-20.0
-30.0
-40.0
LMA trace, %
171615141312
4.0
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
Localised Faults (LF)
Loss in Metallic Area (LMA)
Signature trace
MRT
Internal degradation
MRT
Internal degradation
MRT
Fretting corrosion
MRT
Fretting corrosion
MRT
Fretting corrosion
MRT
Core degradation
MRT
Core degradation
MRT
Core degradation
MRT
Core degradation
MRT
Internal and external
inspection
MRT
Internal and external
inspection
Offshore lifting ropes
Cableway ropes MRT
Mooring ropes
Crane ropes
MRT – current use • O&G • Mining • Aerial ropeways
MRT – future use • As above + • Rope factory (signature trace) • Cranes (ISO 4309) • Mooring ropes
Thank you