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- since 1996 -

Zawada NDT
Suppliers of instruments to test steel wire ropes in-situ, using magnetic, non-destructive method.
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Technical Discussions
joss
Consultant,
GIE SA , TELEDYNE ICM, Argentina, Joined Oct 2017, 4

joss

Consultant,
GIE SA , TELEDYNE ICM,
Argentina,
Joined Oct 2017
4
22:59 Oct-05-2017
Density limitations for digital radiography

Nothing is stated about the subject in ASME V, only stated that T225 requirement is not applicable.
So, I´d like to know what are the density limitations.
Any input will be appreciated.

 
 Reply 
 
Kratus
Consultant,
Petrobras Petroleo Brasileiro, Brazil, Joined Jun 2015, 3

Kratus

Consultant,
Petrobras Petroleo Brasileiro,
Brazil,
Joined Jun 2015
3
13:03 Oct-06-2017
Re: Density limitations for digital radiography
In Reply to joss at 22:59 Oct-05-2017 (Opening).

Good morning, please look at T-282.1

1
 
 Reply 
 
Rakesh Parmar
NDT Inspector,
India, Joined Dec 2014, 58

Rakesh Parmar

NDT Inspector,
India,
Joined Dec 2014
58
03:20 Oct-07-2017
Re: Density limitations for digital radiography
In Reply to joss at 22:59 Oct-05-2017 (Opening).

HI,


I think for Digital Radiography there is a grey value is given instead of Density.

 
 Reply 
 
Dr. Uwe Zscherpel
Director,
BAM Berlin, Germany, Joined Jan 2010, 85

Dr. Uwe Zscherpel

Director,
BAM Berlin,
Germany,
Joined Jan 2010
85
10:18 Oct-09-2017
Re: Density limitations for digital radiography
In Reply to Rakesh Parmar at 03:20 Oct-07-2017 .

If you are doinf Digital Radiography without using any film, then you are not able to fulfill any requirements on film density! Therefore, these requirements are translated into requirements on normailzed signal-to-noise ratio in you digital radiograph, see ISO 17636-2 for more details. Grey values doen not hlpe, because they can be scaled arbitrary. Only SNR in the image counts.
Uwe Z.

1
 
 Reply 
 
khalid
Engineering, ASNT and ISO NDT level III+ RPO
Saudi Arabia, Joined Aug 2009, 10

khalid

Engineering, ASNT and ISO NDT level III+ RPO
Saudi Arabia,
Joined Aug 2009
10
14:18 Oct-09-2017
Re: Density limitations for digital radiography
In Reply to joss at 22:59 Oct-05-2017 (Opening).

VIII-221.2 Procedure Demonstration. Demonstration of image quality indicator (IQI) image requirements of the written procedure on production or technique radiographs using phosphor imaging plate shall be considered satisfactory evidence of compliance with that procedure.

this mentioned in ASME 2010 under radiography using phosphor plate which is give at the end digital radio-graph.

1
 
 Reply 
 

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