Forensics

Magnetic Flux Leakage Inspection (eMag)

Reasons why eMag is carried out:

  • Safety
  • Conform to regulatory requirements
  • Extend rope life
  • Settle disputes as to the condition of a rope

Prior to the introduction of the eMAG technique, the condition of ropes had to be assessed by external appearance. eMAG enables ropes to be assessed through their entire thickness.

Range of Services

Testing winch ropes at MSE, Pasir Gudang
  1. Testing of winch ropes at a ship lift. The success of this work in Malaysia is described in a paper presented in the 8th European Conference on NDT in Barcelona in 2002.

  2. Testing elevator wire ropes. In the event of flooding, water enters elevator pits and comes into contact with lift ropes, and there is often dispute as to whether rope is damaged by such contact.
  3. Testing of 20-40mm ropes on Lampson crane 1200 at PT McDermott, Bataam, Indonesia.
  4. Testing ropes on large cranes used in the oil and gas industry. We have tested these cranes onshore and offshore.

Equipment

  • We can test ropes in the size range 6-64mm diameter.
  • The data logger can hold up to 8,000m of test result in memory
  • Maximum rope speed through head is 2m/second
  • For breaks on the surface, the detector will find one broken wire in as many as 250 wires.
  • For internal breaks, the detector will find fractures when they amount to 1% or more of the total number of wires.
  • For corrosion at any location, the detector will find 1% or more loss in cross sectional area.
  • As the rope passes through the magnetic head, the results are shown in real time on a lap computer. If there is a broken wire the rope can be stopped and the problem area of rope visually examined.

Personnel

Our EMAG service is managed by our mechanical engineers, Anand Ghnavello and Poon Poh Wong. Both are ASNT Level II in Magnetic Flux Leakage. Our main operator is Hairol Azman Bin Jawahir, ASNT Level II in MT, PT, UT, ET, and MFL (Magnetic Flux Leakage). He has seven years experience in rope inspection by the MFL method. We have two additional operators with ASNT Level II in Magnetic Flux Leakage. Two of our personnel are qualified visual inspectors for wire ropes and slings.

Standards

In addition to the personal qualifications of our staff, our work is carried out to international standards, such as the following.

  1. ISO 4344 - Steel wire ropes for lifts: Minimum requirement
  2. E 1571-06 - Standard Practice for Electromagnetic Examination of Ferromagnetic Steel Wire Rope
  3. ASME B30.5-2004 - Mobile and Locomotive Cranes, Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks and Slings

Recent Work

Testing of 42mm rope on board the Tioman drilling tender Robray T-6, on Petronas Carigali Sumandak A platform.
Testing of 24-64mm ropes and slings on board the Seadrill drilling tender West Pelaut, on Brunei Shell F13-E platform.