EMISSION AND UT NDT SERVICES
Mistras Group Hellas ABEE provides high quality, unique NDT
services to industries in Greece, the Balkans, Middle East
and East Europe.
Our services cover a large array of
world-established and proven applications. Mistras Group Hellas
also performs feasibility studies for specialized
applications to meet the customer's needs.
is a detailed list of NDT services provided by Mistras Group Hellas
with relative links to detailed description of each application:
Emission NDT Services
Metallic Pressure Vessel and Storage Tank Structural Integrity
(MONPAC, ASME-V art.12)
Integrity Acoustic Emission testing according to ASME-V
art.12 and the MONPAC procedure has been developed and proven
on hundreds of vessels around the world. It covers 100%
testing of metallic pressure vessels (spheres, bullets,
towers etc.) and storage tanks (ammonia etc.). The methods
provides classification of possible defects and can be applied
both during Hydrotest and in-service with product.
Tank Floor Condition Monitoring (TANKPAC)
is a proprietary Acoustic Emission method for evaluating
the condition of storage tank floors without emptying
the tank (tanks are tested in-situ with product).
The method provides a classification of floor level of corrosion
Product leakage is "money
leakage". Petrochemical and other industries have used
this simple acoustic emission technique to find leaking
valves and compute the amount of fluid leakage, leading to
direct money savings,
inspect pipelines and tanks during operating
of difficult-to-reach areas.
Cryogenic Tank Testing
Large cryogenic tanks can contain high risk
products such as ammonia, butane and propane. High frequency AE
sensors are attached at typically a 6-meter spacing over the entire test
area. Where the vessel
is insulated with very thick insulation, the sensors are often mounted
permanently underneath the insulation and cabled back to a connection
point, so that repeat installation costs are not incurred.
Cool Down Testing
Cool Down Testing is an
alternative to on-line Acoustic Emission (AE) testing for
hot reactors, towers, columns and associated hot circuit
piping systems. Cool down tests always generate high
loading in the longitudinal direction of a pipe or vessel.
This presents an ideal scenario for detecting
Large Transformer Testing (Partial Discharge)
Discharge is the source of many large grid transformer problems.
Acoustic Emission can monitor and locate the occurrence
of PD by in-situ monitoring the transformer, and evaluate
Aerial Manlift Devices
Integrity of Aerial Manlift devices is evaluated by a fast
100% coverage acoustic emission test. Safe operation is
crucial to these devices and their structural integrity
is often compromised and needs to be assessed due to improper
Tank and Vessel Automated Corrosion Mapping
scanning UT systems (crawlers) are used to rapidly map the
surface of vessels for corrosion effects. The level of detail
and speed can be very high providing a corrosion image of
Tube Automated Corrosion Mapping
Heat Exchanger etc. tubing are often subject to extreme
conditions and their safe operation is crucial in many respects.
Specialized ultrasonic (UT) scanning systems scan the inner
surface of tubes in a rapid and accurate manner providing
important corrosion mapping with high detail.
Automated UT Weld Inspection
(crawler) UT weld inspection for vessels is performed with
small measurement intervals for a high analysis inspection
Guided Ultrasonic Waves (GUL)
Guided Ultrasonic waves provide a new
solution for pipe inspection. The inspection is a very fast pipe screening
technique which provides information about cross section area change in
the pipe together with precise information a to where along the pipe this
In the recent past,
an effort has begun for applying automated and semi-automated ultrasound
inspection on welds, aiming at a more rapid control, repeatability and
permanent recording of the inspection (as with radiography). With
this context the TOFD technique was developed.
Ultrasonic (UT) Thickness Measurements
Mistras Group Hellas offers high level thickness measurement
services on pipes, pressure vessels, boilers, tanks etc,
by its experienced and certified inspectors.
Manual Ultrasonic (UT) Weld Inspection
technique consists of scanning the weld mass and the Heat
Affected Zone (HAZ) with ultrasonic beams emitted by angle probe
that is moved manually along the lateral region of the weld.
Rapid Tube Inspection
Current (ET) or Remote Field (RFT) methods
Rapid Non Destructive (NDT) inspection of tubes can be
performed using Eddy Current (ET) or Remote Field (RFT)
methods applicable to a variety of tubing applications
such as heat exchangers, furnaces etc in various types of
for Service Studies
NDI (Non Destructive Inspection) data with analytical and
numerical techniques (finite elements) for the assessment
of the condition of equipment such as vessels, towers etc.
as compared to operating requirements.