Our Industries
Tubular Inspection
| Engineering |
| NDT Inspection |
| Visual Inspection |
"On behalf of Battlefield Newfoundland I have to forward a huge thank you for your technician's services this year. He has gone beyond the call of duty to help us get through the last couple of months of processing equipment. If more of our vendors were like this it would make our job so much easier."
Robert Simms, Service Administrator
Battlefield Equipment, Mount Pearl Newfoundland
"I have been working with Domson Engineering for over 10 years on various aspects in our high profile projects. Domson has always come to the table with cost effective ideas and solution minded staff that get the job done."
Steve Matthews, G.S.C. / Construction Manager, Structural Steel Division
E.S. Fox Ltd.
"We will be using Domson in the future for any NDT work. The response and work your staff did was excellent. My own Level III guy was very impressed."
Joseph W. Peckan, Manager of Quality Engineering, Safety and Environmental Systems
Welded Tube of Canada
"Domson's NDT testing of the chairlift cable was extremely thorough and professional and would highly recommend their services."
Don Horner
Ski Valley, Minnedosa Manitoba
"Excellent work in an accelerated time period. Thank you for your support."
Steve Watts, Technical Support Manager, Americas
Rolls-Royce Energy, CSB
"Thanks for all your work on designing our challenging lift at Whitby Co-gen. It was good to see a lift go as planned without any unexpected problems."
Gary Epps, Electrical & Power Supply Technician
Whitby Cogeneration L.P.
Tubular Inspection with Eddy Current, Remote Field & IRIS
Eddy Current (ET)
Eddy current is the most common method of inspecting non-ferrous heat exchanger tubing such as brass, copper and stainless steel. Eddy current testing is very sensitive to cracks, wall loss due to erosion and corrosion, and can easily distinguish between OD and ID wall losses.
Remote Field (RFT)
Remote field testing is used on ferrous tubes such as carbon steel and duplex stainless steel and is a “through-wall” technique, meaning the signal travels through the tube wall and back in again. RFT is very useful to determine general wall loss and pitting, but cannot differentiate between ID and OD defects. As a result, RFT is often backed up with a secondary method, which may be examination of a pulled tube, video inspection, or IRIS.
IRIS
IRIS is an ultrasonic technique that uses a tiny spinning mirror and water to transmit an ultrasonic pulse against the inside of the tube wall. The signal travels through the tube wall and reflects off the outer surface, and provides an extremely accurate and very easily interpreted image of the remaining wall thickness. IRIS requires extremely clean tubes to obtain a good signal and is much slower than eddy current or RFT. As a result, it is often used as a final verification method or is used sparingly on selected tubes.
For all tube inspection work, the tubes need to be cleaned to remove metallic deposits which may mask discontinuities. Eddy current and RFT data require very careful analysis by a trained Level 2 technician.
Domson owns and operates state of the art Olympus MS5800 tube inspection equipment which can run eddy current, remote field, and IRIS inspections without the need for a second unit.
Surface Eddy Current
Eddy current testing can be used to measure coating thickness, find discontinuities such as cracks, metal identification, corrosion scanning, and a variety of other applications. It is restricted to conductive, non-ferrous metals.
