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 -

Airstar Inc.
Application of the newest technologies, such as air-coupled ultrasound, digital instrumentation, signal processing, and transducer technology.

4830 views
Technical Discussions
Bong Jin Son
Engineering, Inspection, Corrosion, Material
SK Innovation, South Korea, Joined Apr 2008, 8

Bong Jin Son

Engineering, Inspection, Corrosion, Material
SK Innovation,
South Korea,
Joined Apr 2008
8
02:28 Nov-23-2007
Carburization thickness measuring

Carburization of low alloy steel tube for fired heater in refinery and petrochemical plant occurs. Sometimes carburzation makes big trouble due to metal dusting and it brings to emergency plant down. I am lookging for the method to measure the thickness of carburization of low alloy steel.
Is there anybody who knows that?


    
 
 
Ovidiu Iuga
NDT Inspector, thermography
ISCIR, Romania, Joined Dec 2005, 16

Ovidiu Iuga

NDT Inspector, thermography
ISCIR,
Romania,
Joined Dec 2005
16
08:22 Nov-23-2007
Re: Carburization thickness measuring
----------- Start Original Message -----------
: Carburization of low alloy steel tube for fired heater in refinery and petrochemical plant occurs. Sometimes carburzation makes big trouble due to metal dusting and it brings to emergency plant down. I am lookging for the method to measure the thickness of carburization of low alloy steel.
: Is there anybody who knows that?
------------ End Original Message ------------

Are you looking for a NDT method?

It's not possible to determine the depht of carburized layer using a NDT Techinque. Only by micro HV hardness test done on a sample prevlevated from the pipe, tube or whatever it is. As far as I remeber it's a standardised method. If it helps you I can dig and send you the spec. number.

Regards,
Ovidiu



    
 
 
Ingo Becker
Engineering, NDT Inspector & Sales
ec-works GmbH, Germany, Joined Apr 2000, 28

Ingo Becker

Engineering, NDT Inspector & Sales
ec-works GmbH,
Germany,
Joined Apr 2000
28
01:24 Nov-25-2007
Re: Carburization thickness measuring
We have developed an eddy current application to evaluate the carburisation thickness of steanless steel reformer tubes. As always with eddy current, you need tailored calibration tubes. We have not tried this for low alloy steels, but if the electric and magnetic values of the tubes changes with the carburisation, it might be possible to detect this with eddy current applications.

Best regards

Ingo Becker

----------- Start Original Message -----------
: Carburization of low alloy steel tube for fired heater in refinery and petrochemical plant occurs. Sometimes carburzation makes big trouble due to metal dusting and it brings to emergency plant down. I am lookging for the method to measure the thickness of carburization of low alloy steel.
: Is there anybody who knows that?
------------ End Original Message ------------




    
 
 
Floyd Atkinson
Floyd Atkinson
05:33 Dec-16-2007
Re: Carburization thickness measuring
Key component, tailored calibration tube sample, conplete with side cut slots, key holes and representative of the density of the tubes being tested. This is very hard to get and then come out with eddy current recordable results. Those tubes must be hydro cleaned and lightly brushed to remove residual chemical trash from the tubes proir to testsing. Been there done that. Then you need a thoroughly experienced eddy current engineer or a legal ASNT Eddy Current Level III to intepret the results.

Good luck.
Floyd Atkinson

----------- Start Original Message -----------
: We have developed an eddy current application to evaluate the carburisation thickness of steanless steel reformer tubes. As always with eddy current, you need tailored calibration tubes. We have not tried this for low alloy steels, but if the electric and magnetic values of the tubes changes with the carburisation, it might be possible to detect this with eddy current applications.
: Best regards
: Ingo Becker
: : Carburization of low alloy steel tube for fired heater in refinery and petrochemical plant occurs. Sometimes carburzation makes big trouble due to metal dusting and it brings to emergency plant down. I am lookging for the method to measure the thickness of carburization of low alloy steel.
: : Is there anybody who knows that?
------------ End Original Message ------------




    
 
 
Jeff Elam
Jeff Elam
00:01 Oct-13-2011
Re: Carburization thickness measuring
In Reply to Floyd Atkinson at 05:33 Dec-16-2007 .

I have heard of non-destructive methods to test furnace tubes for carburization in-situ. The methods have only been tested on tubes with a maximum chrome percentage of 9. Has anyone heard of a non-destructive test that could be used in-situ to test for carburization on 25 chrome 35 nickel furnace tubes?

    
 
 
Syed Adnan
Engineering,
SABIC, Saudi Arabia, Joined Dec 2013, 2

Syed Adnan

Engineering,
SABIC,
Saudi Arabia,
Joined Dec 2013
2
09:45 Feb-18-2014
Re: Carburization thickness measuring
In Reply to Jeff Elam at 00:01 Oct-13-2011 .

KABOTA manufactured carburization meter . We are using succesfully.

    
 
 
Michel Couture
NDT Inspector,
consultant, Canada, Joined Sep 2006, 822

Michel Couture

NDT Inspector,
consultant,
Canada,
Joined Sep 2006
822
23:14 Feb-18-2014
Re: Carburization thickness measuring
In Reply to Jeff Elam at 00:01 Oct-13-2011 .

Have you tried Eddy Current?

    
 
 
Syed Adnan
Engineering,
SABIC, Saudi Arabia, Joined Dec 2013, 2

Syed Adnan

Engineering,
SABIC,
Saudi Arabia,
Joined Dec 2013
2
06:53 Feb-19-2014
Re: Carburization thickness measuring
In Reply to Michel Couture at 23:14 Feb-18-2014 .

we want to try , d oyou know any global service provider ?

    
 
 
Mal Hill
United Kingdom, Joined Jun 2012, 14

Mal Hill

United Kingdom,
Joined Jun 2012
14
13:52 Feb-20-2014
Re: Carburization thickness measuring
In Reply to Syed Adnan at 06:53 Feb-19-2014 .

I heard of a team in the Canary islands using TOFD on piping ,measuring the carborisation layer increase along side readings from a normal UT thickness meter-I think theres an articla on the web about it still.

    
 
 
Kevin Stevens
Kevin Stevens
23:16 Feb-20-2014
Re: Carburization thickness measuring
In Reply to Mal Hill at 13:52 Feb-20-2014 .

My understanding of the Kubota carburisation meter, is that it is a hand held device, so it is typically used on the bottom 2m of reformer tubes. Quest Integrity have an eddy current system mounted on a crawler that can reach the hotter regions of furnaces where the carburisation is worse. Quest have been inspecting HPM alloy (25%Cr-35%Ni) tubes used in ethylene crackers, using an eddy current method. The magnetic permeability increases when the Cr levels in the matrix is depleted below approx. 12 to 15%. A swept frequency approach can be used to infer the carburisation thickness by fitting FEA models to the probe impedance, see Stevens et al, J. Phys D, Appl Phys Vol 37, p501-509, 2004. The quest system is available as a commercial service. The crawler can also measure the tube diameter increase associated with carburisation.

    
 
 

Product Spotlight

ISAFE3 Intrinsically Safe Sensor System

ISAFE3 intrinsically safe sensor system of Vallen Systeme is especially targeted at the petrochemica
...
l - as well as oil and gas transportation industry. The sensor system is designed for permanent monitoring or periodic inspection tasks. Sensors are available for different AE-frequency ranges optimized for corrosion and fatigue crack detection and other applications. The ISAFE 3 sensor system consists of an AE-sensor (model ISAS3) certified according to ATEX/IEC for installation in zone 0, gas group IIC, IP68, 20 to +60 °C, and a signal isolator (model SISO3) certified for installation in zone 2. An ISAS3 sensor can be mounted in atmosphere or submerged, e.g. in water or crude oil. It is supported by mounting tools for temporary (magnets) or permanent (welded) installation. ISAFE3 supports automatic sensor coupling test and can be used with any AE signal processor supporting 28V supply at 90 mA peak, e.g. Vallen Systeme ASIP-2/A.
>

AMIGO2

TSC Amigo2 - ACFM technology has developed a solid reputation for accurately detecting and sizing
...
surface-breaking cracks through paint and coatings. As the industry demands increased performance in speed, signal quality, and portability, it’s time for an evolution. It’s time for Amigo2.
>

Varex Imaging Large Field of View (FOV) Digital Detector Arrays (DDAs)

A larger FOV DDA can reduce the space and volume of the X-ray inspection system on the factory floor
...
, enable faster scanning times, better throughput and better resolution images at a lower dose. Customers can also save time and money. With these benefits in mind, Varex Imaging has designed a family of large FOV detectors (4343HE, XRD 1611, 4343DX-I, 4343CT) for our industrial imaging customers.
>

NOVO Armor 15 & NOVO Armor 22

The Armor Kit Contains the NOVO Armor, which provides additional mechanical protection to the NOVO 1
...
5WN & NOVO 22WN Detectors, the Armor Stand and a traveling soft cover. - Newest shock absorbent technology case - Water resistant design - Supports wired & wireless communication - Multiple positioning options - Tripod connection using the Built-in 1/4” threads - Simple Detector battery replacement
>

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
s