ANDT Oil and Gas Brochure - MISTRAS Group, Inc.

3
Guided Wave Collar
• Eliminate vessels from turnarounds
using risk based inspection (RBI)
methodology and global inspection.
• Identify and size defects caused by
unique damage mechanisms like High
Temperature Hydrogen Attack, Stress
Corrosion Cracking, and more.
• Perform “On-Line” Monitoring of
suspect assets to ensure continued safe
operation.
VESSELS
TOFD
Vessel service leads to the following issues:
• Internal and External Erosion/Corrosion
• Cracking
• Weld and weld heat affected zone issues
• Metallurgical damage
Advanced techniques used to determine the above
damage mechanisms are:
AE MONPAC PLUS INSPECTION
MonPAC Plus is a technology package developed
by MISTRAS that allows owners to inspect a pressure
vessel to determine the relative condition of
the asset while the asset is still in service. Potential
anomalies are detected and located for use in
follow up inspections. The use of MonPAC Plus
greatly reduces the need to further perform costly
out of service inspections of vessels that show no
signs of degradation.
ROPE ACCESS
Certified rope access technicians work in difficult
or inaccessible areas efficiently without the need
for scaffolding, cranes, or mobile work platforms.
Using rope access for inspection and maintenance
activities generates significant cost-savings for asset
owners, especially where traditional access
methods comprise a major portion of the overall
project budget.
AUTOMATED ULTRASONIC LSI
See Page 5, Piping, for more information.
www.mistrasgroup.com | +1.609.716.4150 | sales@mistrasgroup.com
PULSED EDDY CURRENT (PEC)
PEC technology is an inspection technique for
measuring the thickness of steel objects without
direct contact to the steel surface. The electromagnetic
test uses a pancake probe to identify
general corrosion through insulation or concrete
surfaces by introducing an electric current into
the transmitter coil, magnetizing the steel and
measuring wall thickness. PEC is ideal for surveying
large sections of piping or pressure vessels to
detect areas that have been affected by moisture
trapped under insulation causing corrosion of
the asset being inspected. Use PEC when other
NDT techniques may be limited due to the larger
diameters encountered when inspecting insulated
vessels.
PHASED ARRAY
See Page 5-6, Piping, for more information.
ULTRASONIC P-SCAN
Different forms of cracking such as fatigue, creep,
HIC, SOHIC and various forms of embrittlement,
may occur depending on the process in which
the equipment is operating. These begin as microscopic
damage and can occur along the grain
boundaries of the parent material or the weld
heat affected zones. The P-Scan is used to accurately
detect and size these mechanisms in its
early stages of damage formation, while creating
three dimensional views of the weld that enables
the operator to better visualize its position.
TIME OF FLIGHT DIFFRACTION (TOFD)
TOFD is utilized as a quick survey tool of welds
and weld heat affected zones in pressure vessels
looking for the presence of welding fabrication
defects or screening for cracking. It is an excellent
tool for providing accurate through-wall depths of
existing cracks.