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 -

1189 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


 
 Reply 
 
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


 
 Reply 
 
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



 
 Reply 
 
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



 
 Reply 
 

Product Spotlight

32:128PR PAUT & 2-ch TOFD Flaw Detector: SyncScan 2

●32:128PR PAUT with optional 2-ch TOFD to maximize your efficiency ●Support PR mode for corrosi
...
on inspection ●Multiple solutions for welds & corrosion ●Faster scan speed (Approximately 3 meters/minute) ●Light weight: 4kg only including battery
>

PAUT Probes

Typical Phased Array probes have frequencies between 1MHz and 20MHz and the number of wafers is 10
...
to 128. M2 Electronics offers customers conventionally ultrasound probes and the ability to provide high-precision Phased Array Ultrasound Probes of up to 256 wafers. We can also customize the probe for our customers to meet the specific application requirements of the user.
>

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.
>

IRIS 9000Plus - Introducing the next generation of heat exchanger inspection.

Representing the seventh generation of the IRIS system, the IRIS 9000 Plus has nearly 200 years of c
...
ombined field inspection experience incorporated in its design. This experience combined with a strong commitment to quality and a history of innovation has made Iris Inspection Services® the undisputed leader in IRIS technology.
>

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