ANDT Oil and Gas Brochure - MISTRAS Group, Inc.

Phased Array P-Scan & Computed RT Valve Testing and Monitoring
Guided wave can detect both internal and external
corrosion or other significant defects and locate
them along the pipe. MISTRAS uses the latest
guided wave technology called the G3 or the third
generation system which supplies better accuracy
than previous technology. In addition, Permanently
Installed Sensors (PIMS) can be installed in various
locations, including buried piping applications,
to monitor areas that are suspect without having
to dig trenches for subsequent inspections.
ULTRASONIC P-SCAN
Whether looking for a more thorough tool to
evaluate the quality of a weld, or for environmentally
assisted cracking such as fatigue, stress
corrosion cracking and others, the P-Scan system is
more than capable of imaging these flaws in a way
to better evaluate, characterize and size them.
COMPUTED RT
Computed Radiography is especially effective when
used with profile radiographic techniques when
looking for quantitative & qualitative data for piping.
This technique enables evaluation of large sections
of piping to determine erosion/corrosion rates
in this section vs. the relatively small areas obtained
using point to point ultrasonic thickness exams. In
addition, computed radiography may be used during
ASME or other code welding processes in lieu
of traditional radiography. The combination of computed
radiography and a Selenium 65 radiographic
source enables a dramatic reduction of radiation in
boundary areas. This reduction allows welders to
work in close proximity to the inspection area.
www.mistrasgroup.com | +1.609.716.4150 | sales@mistrasgroup.com
ACOUSTIC EMISSION (AE)
Leaking valves are a common problem with results
showing that 5 to 10 percent of the valves in Oil
and Gas plants leak. More importantly, it was
determined that just 1 to 2 percent of the valves
accounted for approximately 70 percent of the
losses. Valve leak detection works by detecting
the “noise” produced as the medium passes
through the valve as “turbulent” flow. Turbulent
flow creates a signal with frequency components
well over 100 KHz. This allows the use of high frequency
acoustic emission sensors with frequencies
above the vibration and background noise level
of the plant. This characteristic makes reliable
detection and quantification of leaks possible. In
addition to being able to determine if a valve is
leaking, our proprietary algorithms allow us to
“quantify” the amount of the leak.
ADVANCED ULTRASONIC BACKSCATTER
TECHNIQUE (AUBT)
Certain low alloy carbon steel material operating
at temperatures and hydrogen partial pressures
above the Nelson Curve, can be suspect
to decarburization as well as microfissuring and
macrocracking, which can result in catastrophic
consequences. With the use of proven ultrasonic
technologies evaluating frequency dependence,
velocities, and several other factors, we are able to
help determine which pieces have been affected
by High Temperature Hydrogen Attack (HTHA).
PULSED EDDY CURRENT (PEC)
See Page 3, Vessels, for more information.
• Save millions of dollars in lost
production cost
• Qualitative and quantitative
measurement capabilities
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