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