Welding crack detection and sizing
AC Field Measurement method
Surface cracks detection and sizing (length and depth) on
ferromagnetic and iron
and assessment (length and depth)
examination of weld joints
integrity of any type of structures: capacities, tanks, gantries,
spheres, barges, bridges,…
Large application area :
Petrochemical, Civil Engineering, nuclear, offshore, power station,
Weld Inspection with Magnetic Testing method
Destructive Testing method detects surface breaking or near defects in
ferromagnetic parts. The Magnetic testing method is based on
magnetic field disturbances : the flux is distorted in the region of the
Fine magnetic particles, applied on the specimen, are attracted to the
area of flux leakage, creating a visible indication of the flow.
emerging on the surface
double skink, inclusion, cavity, blowhole.
defect : cold crack, penetration lack, blowhole, ...
Surface grinding crack.
due the thermal treatment
Defects under unclaimed (very close to surface)
or joining lack.
Inspection in automatic mode - TOFD Method
is a method using the ultrasonic beam diffraction, due to the
presence of a discontinuity (defect) on the ultrasound way.
developed by Physical Acoustics, also permits in acquisition configuration
with two transducers the implementation of the TOFD
(Time Of Flight Diffraction)
technique for the
detection and the characterization (length, depth,
etc...) of cracks in welds.
Both transducers, one
being a transmitter and the other
in equal distance on both sides of the weld. Both transducers
beam must be diverging enough to cover the weld
thickness. In this case, only
one longitudinal displacement to the weld is necessary for a