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 -
901 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

HD-CR 35 NDT Computed Radiography System

Portable high-resolution CR scanner for all radiography applications - weld testing, profile images
...
and aerospace. No matter what type of radiographic testing you are performing, the unique TreFoc Technology of the HD-CR 35 NDT imaging plate scanner always guarantees the highest image quality.
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

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.
>

GEKKO - Portable Phased Array Testing with TFM in Real-Time

The portable phased array testing system GEKKO provides 64 parallel test channels. On creating testi
...
ng parameters the operator is assisted by the CIVA software. Due to its modular set-up the GEKKO instrument is suitable for operators of all skill levels.
>

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