where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

933 views
Technical Discussions
mokhtar
mokhtar
02:42 Jun-21-2001
NDT on Ethylene Pyrolysis furnace tubes

What are the most common NDT methods used to inspect the condition of the tubes? What are the limitations?

Thank you.


 
 Reply 
 
Richard D. Roberts
Engineering, Executive Managment
Quest Integrity Group, USA, Joined Nov 1998, 78

Richard D. Roberts

Engineering, Executive Managment
Quest Integrity Group,
USA,
Joined Nov 1998
78
03:33 Jun-21-2001
Re: NDT on Ethylene Pyrolysis furnace tubes

Dear Sir,

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.

Regards,
Rich Roberts
--------------- ORIGIONAL MESSAGE -----------
: What are the most common NDT methods used to inspect the condition of the tubes? What are the limitations?
.
: Thank you.
.



 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 280

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
280
01:09 Jun-30-2001
Re: NDT on Ethylene Pyrolysis furnace tubes
A number of Ethylene Plants apply Acoustic Emission during a hydrotest of the tubes. Activity in the AE occurs from early stages of damage (ie Before the level of ultrasonic detection). Results grade the level of activity in the tubes and they can then be prioritised for other more time consuming inspections such as the Laser, Ultrasonics etc. Good success is reported in A) the speed of the test as all tubes can be tested in one shot B) the ability to identify early stages of damage C) prioritisation and risk ranking for replacement or other inspection work.


 
 Reply 
 

Product Spotlight

Echomac® PA Bar Tester

The Echomac® PA BT provides 100% inspection of round bars for core and surface defects, at speeds u
...
p to 2 m/sec, depending on the specific application. The unit allows producers to handle a much larger range of diameters in one installation, and is available in 3 models to test 10 – 75mm diameter (small model); 20 – 130mm (medium model) or 50 – 254mm (large model) bars.
>

MANTIS

MANTIS is a compact, powerful and affordable flaw detector (16:64PR), dedicated to field operators
...
. This portable equipment offers standard (electronic-, sector-, compound scan, conventional UT for pulse-echo, dual array and TOFD inspections), and advanced phased-array (real-time TFM -Total Focusing Method). MANTIS benefits from the same intuitive and user-friendly interface (CAPTURE) than Gekko for easier inspections.
>

TESTD-PT SYSTEM

Pulse thermography is a non-contact test method that is ideal for the characterization of thin fil
...
ms and coatings or the detection of 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 possible to investigate highly conductive or diffusive materials.
>

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.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window