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Technical Discussions
Posma M. Pakpahan
NDT Inspector
PT. Pupuk Kaltim Tbk, Indonesia, Joined Jun 2003, 4

Posma M. Pakpahan

NDT Inspector
PT. Pupuk Kaltim Tbk,
Indonesia,
Joined Jun 2003
4
08:10 Jan-14-2004
Test Frequency Of To Measure Thickness Of Zr

Dear All,

Any of you can inform me the test freq to measure the remaining thickness of Zr in Bimetallic tube of our HP. Stripper in Urea Plant by using Eddy Current Instrument. As information, tube is made from SS 310 L Mod and Zr on the inside surface with design thicknes of Zr is 0.7 mm.

Thank you and the information would be highly appreciated.


    
 
 Reply 
 
N. Kuppusamy
Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd, Singapore, Joined Dec 2003, 34

N. Kuppusamy

Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd,
Singapore,
Joined Dec 2003
34
05:03 Jan-15-2004
Re: Test Frequency Of To Measure Thickness Of Zr
M. Pakpahan,
What is the thickness of SS310 tube?

N.Kuppusamy
----------- Start Original Message -----------
: Dear All,
: Any of you can inform me the test freq to measure the remaining thickness of Zr in Bimetallic tube of our HP. Stripper in Urea Plant by using Eddy Current Instrument. As information, tube is made from SS 310 L Mod and Zr on the inside surface with design thicknes of Zr is 0.7 mm.
: Thank you and the information would be highly appreciated.
------------ End Original Message ------------




    
 
 Reply 
 
S.V.Swamy
Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex , India, Joined Feb 2001, 787

S.V.Swamy

Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex ,
India,
Joined Feb 2001
787
04:12 Feb-09-2004
Re: Test Frequency Of To Measure Thickness Of Zr
Dear Mr.Kuppuswamy,

The Zr-coating is inside the tube of SS 310 and so, the inspection is to be carried out using a ID Bobbin type coil. Will the substrate thickness affect the readings?

And don't all of you think an IRIS system using ultrasonics is much better for this situation?

Regards.

Swamy

----------- Start Original Message -----------
: M. Pakpahan,
: What is the thickness of SS310 tube?
: N.Kuppusamy
: : Dear All,
: : Any of you can inform me the test freq to measure the remaining thickness of Zr in Bimetallic tube of our HP. Stripper in Urea Plant by using Eddy Current Instrument. As information, tube is made from SS 310 L Mod and Zr on the inside surface with design thicknes of Zr is 0.7 mm.
: : Thank you and the information would be highly appreciated.
------------ End Original Message ------------




    
 
 Reply 
 
Andre van Vuuren
Andre van Vuuren
09:17 Feb-09-2004
Re: Test Frequency Of To Measure Thickness Of Zr
Urea Strippers
The secret is not in one method inspection approach but multiple as both Eddy Current & IRIS should be used. Accurate calibration tubes for the Eddy Current testing and the IRIS inspection is critical. As to the frequency to be used for the inspection depends on the equipment being used as well as the analysis software. We at Steel Test use the TC5700 to inspect these tubes and have achived the desired results

Kind Regards
Andre van Vuuren
Steel Test
South Africa

----------- Start Original Message -----------


: : : Dear All,
: : : Any of you can inform me the test freq to measure the remaining thickness of Zr in Bimetallic tube of our HP. Stripper in Urea Plant by using Eddy Current Instrument. As information, tube is made from SS 310 L Mod and Zr on the inside surface with design thicknes of Zr is 0.7 mm.
: : : Thank you and the information would be highly appreciated.
------------ End Original Message ------------




    
 
 Reply 
 
N. Kuppusamy
Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd, Singapore, Joined Dec 2003, 34

N. Kuppusamy

Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd,
Singapore,
Joined Dec 2003
34
04:31 Feb-10-2004
Re: Test Frequency Of To Measure Thickness Of Zr
Dear S.V.Swamy,

If you use ID Coil, the base material thickness will not have impact on the readings.

I don't have any idea about the limitations and accuracy of iris to carryout the above measurements.

Regards,

N.Kuppusamy

----------- Start Original Message -----------
: Dear Mr.Kuppuswamy,
: The Zr-coating is inside the tube of SS 310 and so, the inspection is to be carried out using a ID Bobbin type coil. Will the substrate thickness affect the readings?
: And don't all of you think an IRIS system using ultrasonics is much better for this situation?
: Regards.
: Swamy
: : M. Pakpahan,
: : What is the thickness of SS310 tube?
: : N.Kuppusamy
: : : Dear All,
: : : Any of you can inform me the test freq to measure the remaining thickness of Zr in Bimetallic tube of our HP. Stripper in Urea Plant by using Eddy Current Instrument. As information, tube is made from SS 310 L Mod and Zr on the inside surface with design thicknes of Zr is 0.7 mm.
: : : Thank you and theinformation would be highly appreciated.
------------ End Original Message ------------




    
 
 Reply 
 
Michael L. Christensen
Michael L. Christensen
07:20 Feb-11-2004
Re: Test Frequency Of To Measure Thickness Of Zr
----------- Start Original Message -----------
: Dear Mr.Kuppuswamy,
It is vital to have the right calibration tubes. We are holding calibration tubes with machined defects between the Zr and the outside surface of the SS. I don´t think it is possible to give a thickness of the Zr layer using eddy current or IRIS. IRIS as an inspection methode, may in this case, suffer from disbonding between the Zr and the SS.


Best regards

Michael L. Christensen

Force Technology
Denmark
------------ End Original Message ------------




    
 
 Reply 
 
new york yankee
new york yankee
06:13 Jul-02-2005
new york yankee

----------- Start Original Message -----------
: Urea Strippers
: The secret is not in one method inspection approach but multiple as both Eddy Current


    
 
 Reply 
 

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