Ultrasonic Testing Welds

This is a very specialised service which IIS provide, using the latest, up to date equipment. Ultrasonic Inspection uses high frequency sound energy which transfers into the material at a known velocity to enable an experienced operator to evaluate the thickness and any flaws which may exist within the material.


Weld Defect

If a discontinuity i.e. lamination or crack blocks the sound wave path, some or all the energy will reflect from the flaw surface. The reflected wave signal is transferred by the probe which converts mechanical energy into electrical signals.  The resulting signal is then displayed, via a cathode ray tube on to the screen of the ultrasonic flaw detector. Interpreting this signal, we can determine the location, size and orientation of the discontinuity.

Ultrasonic Weld Diagram

We are fully qualified to test the following items.

Forgings/bars/billets/ plate (PCN Level 2)

We have a vast amount of experience in the field of Ultrasonic Testing of forged parts for the oil and gas industries. (We have a full range of reference blocks), including Carbon Steel, Inconel and Stainless Steels, including Duplex, in full compliance with clients such as Cameron, GE Oil & Gas, Aker Solutions and FMC.

Weldments (3.1/3.2/3.7/3.8 and 3.9)

We are fully qualified and experienced in all Ultrasonic Weld inspections that satisfy British/European and International standards.

Projects include, McEwan Hall (Edinburgh), Norbord (Inverness), V & A Buildings (Dundee), Queensferry Crossing.

Clad Welded Components – This process is used to provide protection against corrosion and wear to prolong the life of the part. It involves bonding two materials together by fusion welding, a carbon steel forging bonded to a non-ferrous nickel, chrome, hastelloy. To check if complete bonding is achieved, an experienced inspector will test with Longitudinal Waves using a clad reference block (FMC Approved).  If a reflective echo is displayed in the bond fusion zone on the flaw detector screen then a decision will have to be made whether it exceeds the reference level as per the specification.

Magnetic Induction (coating thickness) – This is a form of ultrasonic inspection which uses magnetic & eddy current principles to measure coating thickness on both ferrous & non-ferrous metal substrates. This method gives a quick and accurate measurement of all coatings and conforms to national and international standards including ISO and ASTM.

Contact Details
Unit 22, E-Net Park
Mill Road Industrial Estate
West Lothian
EH49 7SF

TEL: 01506 844944


Opening Hours
Monday:           08:00 - 16:30
Tuesday:          08:00 - 16:30
Wednesday:     08:00 - 16:30
Thursday:         08:00 - 16:30
Friday:              08:00 - 13:30
Saturday:          Closed
Sunday:            Closed