Re: NDT on Ethylene Pyrolysis furnace tubes
QUEST Integrated, Inc. had developed a "teatherless" (remote) inspection tool, which employs the combined capabilities of high-speed laser and advanced ultrasonic wall thickness measurements. This tool is transported through the piping via a column of clean water, which provides propulsion, a path for the laser beam, and coupling for the ultrasonic signals. The data is processed and stored in the tool using high-speed digital signal processing modules. At the conclusion of an inspection run, the operator downloads the data from the tool to a portable data station. Features such as internal pitting, corrosion, erosion, swelling, and deformation are located and quantitatively mapped. Custom software provides the ability to view the data with contour, cross-sectional, and tabular displays. The furnace tube inspection service (FTIS) is expected to significantly improve both the quality of inspection data and overall safety in the operation of refinery furnaces.
The Furnace Tube Inspection System (FTIS) is a hybrid-technology tool for the inspection furnaces containing 4- to 6- inch (10- to 15-cm) tubing.
The FTIS simultaneously measures: a) Inside radius b) Average radius c) Pit depth d) Wall thickness e) Average wall thickness f) Axial position for all defects.
Advantages Include: a) Performs noncontact in situ measurements, b) Survives harsh hydraulic inspection environments, c) Inspects entire furnace in 15 minutes or less, d) Negotiates one-dimensional (1D) return bends .
You can visit the QUEST web-site at http://www.qi2.com/field/fsddef.htm for additional information or contact me directly.
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: What are the most common NDT methods used to inspect the condition of the tubes? What are the limitations?
: Thank you.
Conformable wedge transducer
The conformability is obtained with a flexible membrane filled with water between the transducer and
the inspected component. The coupling between the membrane and the component requires a small quantity of water or couplant. The conformable wedge combines the acoustic performance of immersion technique with good coupling and low attenuation.
MUSE Mobile Ultrasonic Equipment
The MUSE, a portable ultrasonic imaging system, was developed for in-field inspections of light-weig
ht structures. The MUSE consists of a motor-driven manipulator, a water circulation system for the acoustic coupling and a portable ultrasonic flaw detector (USPC 3010). The MUSE provides images of internal defects (A-, B-,C- and D-scan).
Pulse thermography is a non-contact test method that is ideal for
the characterization of thin fil
ms and coatings or the detection
defects. With a remarquable short test time and a high detection
sensitivity, the Telops TESTD-PT is the perfect tool for non-
destructive testing. With such high frame rates, it is even
to investigate highly conductive or diffusive materials.