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 -

GRANPECT COMPANY Ltd

1040 views
Technical Discussions
Jim McGregor
Jim McGregor
01:23 Jun-02-2004
Attenuation measurments to check for hydrogen attack

I am looking for information on carrying out attenuation measurments on a 75mm thick carbon steel vessel before and after heat soak to check for hydrogen dispersement. The vessel has been in use for the past 10 years or so. Any help with details and /or a test procedure would be appreciated.

Thanks,

Jim McGregor


    
 
 
Sasaki
Sasaki
03:34 Jun-02-2004
Re: Attenuation measurments to check for hydrogen attack
There are five methods to detect a certain type of hydrogen attack:
1) flaw echo
2) attenuation
3) frequency analysis
4) sound velocity
5) comparison of longitudinal/transverse sound velocities


    
 
 
Kasper Pols
Kasper Pols
09:35 Jun-02-2004
Re: Attenuation measurments to check for hydrogen attack
----------- Start Original Message -----------
: I am looking for information on carrying out attenuation measurments on a 75mm thick carbon steel vessel before and after heat soak to check for hydrogen dispersement. The vessel has been in use for the past 10 years or so. Any help with details and /or a test procedure would be appreciated.
: Thanks,
: Jim McGregor
------------ End Original Message ------------

See website: Sensistor



    
 
 
Jan Verkooijen
Director,
Sonovation, Netherlands, Joined Nov 1998, 29

Jan Verkooijen

Director,
Sonovation,
Netherlands,
Joined Nov 1998
29
04:28 Jun-02-2004
Re: Attenuation measurments to check for hydrogen attack
----------- Start Original Message -----------
: : I am looking for information on carrying out attenuation measurments on a 75mm thick carbon steel vessel before and after heat soak to check for hydrogen dispersement. The vessel has been in use for the past 10 years or so. Any help with details and /or a test procedure would be appreciated.
: : Thanks,
: : Jim McGregor
: See website: Sensistor
------------ End Original Message ------------
Jim,

Detection and monitoring is not a simple subject.
First of all you have to define what type of Hydrogen damage can be expected. Is the vessel operating in high temperature / high pressure environment? In this case you could have High Temperature Hydrogen Attack. Is it working at low temperature, you might be looking at one or more types of Hydrogen Induced Cracking. There is not one method that on its own will give you a conclusive answer on whether you do or don't have Hydrogen Damage. Therefore, during the last 15 years we have developed and practiced combinations of techniques, optimised for the situation at hand. We provide the service worldwide, so if you are interested let us look at your challenge.

Best regards,

Jan Verkooijen



    
 
 

Product Spotlight

FD800 Bench Top Flaw Detectors

The bench-top FD800 flaw detector range combines state-of-the-art flaw detection with advanced mater
...
ial thickness capabilities. Designed for use in the laboratory these gauges are the tool you need for all your flaw detecting needs.
>

SITEX CPSERIES

Teledyne ICM’s CPSERIES has been designed with a view to revolutionizing the handling and perfor
...
mances of portable X-Ray sets. Despite having managed to halve the weight of similar portable X-Ray generators available on the market (while continuing to provide the same power output), the SITEX CPSERIES generators feature a shutter, a laser pointer, a beryllium window, an aluminum filter and two integrated diaphragms (customized sizes are available upon request). Without compromising the robustness and reliability for which ICM products are renowned, the small size and light weight of the SITEX CPSERIES will radically change the way that you perform your RT inspections. And you will see a positive impact in terms of both quality and return on investment (ROI).
>

ISONIC 3510

Very Powerful Superior Performance Extremely Portable Smart Phased Array Ultrasonic Flaw Detector an
...
d Recorder with 2 Conventional UT and TOFD Channels uniquely combines PA, single- and multi-channel conventional UT, and TOFD modalities providing 100% raw data recording and imaging. Suitable for all kinds of every-day ultrasonic inspections
>

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.
>

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