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Technical Discussions
Raúl Navarrete
Consultant, teacher ndt inspector
METAL-MET, C.A., Venezuela, Joined Jul 2000, 8

Raúl Navarrete

Consultant, teacher ndt inspector
METAL-MET, C.A.,
Venezuela,
Joined Jul 2000
8
09:54 Oct-04-2002
Carbon steel boiler inspection

Dear collegues: Can somebody tell me if it is possible to make eddy current inspection on carbon steel tubesd on a boiler or heat exchangers?. If not, what other technics are possible?.

Thank you in advance

Raúl Navarrete


 
 Reply 
 
Keivn Fosha
Keivn Fosha
00:26 Oct-04-2002
Re: Carbon steel boiler inspection
: Dear collegues: Can somebody tell me if it is possible to make eddy current inspection on carbon steel tubesd on a boiler or heat exchangers?. If not, what other technics are possible?.
.
: Thank you in advance
.
: Raúl Navarrete
.
I'm not to sure about "ET", but I know that you can get the same or more information from IRIS inspections.

Go to; http://www.iris-inspection.com , this website is an good source of infotmation.

Kevin Fosha


 
 Reply 
 
Phil Thayer
Phil Thayer
00:40 Oct-04-2002
Re: Carbon steel boiler inspection
: Dear collegues: Can somebody tell me if it is possible to make eddy current inspection on carbon steel tubesd on a boiler or heat exchangers?. If not, what other technics are possible?.
.
: Thank you in advance
.
: Raúl Navarrete
Carbon steel tubes are normally tested with automated UT. NDT auomation manufactures the TUBESCAN system which is the only system that provides automated full CSCAN inspection and data collection. In short, an ID UT probe is rotated and indexed into the tube by a remote feeder. This movement is encoded and the result is a highly detailed CSCAN which will show thining due to corrossion, cracking and pitting. Their web site is www.ndtautomation.com
phone 609-716-4190




 
 Reply 
 
Richard D. Roberts
Engineering, Executive Managment
Quest Integrity Group, USA, Joined Nov 1998, 78

Richard D. Roberts

Engineering, Executive Managment
Quest Integrity Group,
USA,
Joined Nov 1998
78
07:17 Oct-05-2002
Re: Carbon steel boiler inspection
Raul,

A very accurate NDT process to inspect carbon steel boiler tubes that has been used by both the US Military, Utilities & Petrochemical industries since 1985 is the "laser" based "LOTIS" technique. This is a very quick process with extremely high resolution and high accuracy results. For futher information please contact me at richardr@qi2.com

Regards,
Rich Roberts

-------- ORIGIONAL MESSAGE --------------
: Dear collegues: Can somebody tell me if it is possible to make eddy current inspection on carbon steel tubesd on a boiler or heat exchangers?. If not, what other technics are possible?.
.
: Thank you in advance
.
: Raúl Navarrete
.



 
 Reply 
 
Jamie Gauthier
Jamie Gauthier
03:31 Oct-06-2002
Re: Carbon steel boiler inspection
I just want to say that I thought this was a forum to discuss techniques and other problems? Here is someone saying that there is only one Automated UT system that gives a C scan. I just want to clear the air and state that there are many companies that provide/manufacture these Automated UT systems. There will be some that are better than others but that is something this forum could discuss as well.




 
 Reply 
 
John Hansen
Director, - Eddy Current Technology
ETher NDE Ltd, United Kingdom, Joined Oct 1999, 74

John Hansen

Director, - Eddy Current Technology
ETher NDE Ltd,
United Kingdom,
Joined Oct 1999
74
00:44 Oct-07-2002
Re: Carbon steel boiler inspection
To answer your question.

If you have acces to the face the defects are on then you can use conventional eddy currents with care.

Otherwise there is ID probe type inspection with Remote Field (Zetec/Russell etc.) or Semi stauration methods (Disley Devices UK, Kontroll Techniques etc.).

Hope this helps.

Regards

John Hansen
Hocking NDT Ltd.


 
 Reply 
 
Jim Yukes
Jim Yukes
01:20 Jan-09-2003
Re: Carbon steel boiler inspection
: Dear collegues: Can somebody tell me if it is possible to make eddy current inspection on carbon steel tubesd on a boiler or heat exchangers?. If not, what other technics are possible?.
.
: Thank you in advance
.
: Raúl Navarrete
.
As noted in the other responses there are several ways to examine CS boiler tubes. If you can supply information on the type of boiler and the defects, if any, that you expect to locate it could narrow down your search.

Remote Field Testing (RFT) is often used in drum to drum applications with the probe inserted internally inot the tube. It is a fairly fast examination and can be done with some scale build up on the tube ID. Boiler tubes are typicaly inspected (by Russell at any rate)using multi-channel flexible probes for increased sensitivity to eccentric defects.

A new type of "RFT" inspection using Low Frequency ET is also available for inspection of water walls in large boilers. This inspection is done from the tube OD. Tubes should be cleaned to removed excess external defects. Gas fired boilers may not require precleaning. Once again multi-channel probes are used for this application.

IRIS is another excellent way of locating defects in boiler tubes. The tubes should be cleaned prior to the inspection and they should also be flooded as water is used a s couplant. the probes are inserted from the steam drum and lowered to the mud drum. IRIS can also be used for near drum inspections from the mud drum. There are several systems for this inspection. For more information see: http://www.panamiris.com/


 
 Reply 
 
Jake Thompson
Jake Thompson
23:45 Oct-12-2011
Re: Carbon steel boiler inspection
In Reply to Jim Yukes at 01:20 Jan-09-2003 .

if you are needing a good place to come and do a boiler inspection you can check out http://www.us.bureauveritas.com/wps/wcm/connect/BV_USNew/local/home/our-services/industrial_manufacturing_compliance/ind_inspection_of_boiler_and_pressure_vessels?Boiler_and_Pressure_Vessel_Inspection. they have some really good inspectors

 
 Reply 
 
massimo carminati
Consultant, AUT specialist
IMG Ultrasuoni Srl, Italy, Joined Apr 2007, 691

massimo carminati

Consultant, AUT specialist
IMG Ultrasuoni Srl,
Italy,
Joined Apr 2007
691
16:00 Oct-13-2011
Re: Carbon steel boiler inspection
In Reply to Keivn Fosha at 00:26 Oct-04-2002 .

As a general statement, RFT for fast screening, followed up by IRIS inspection for better sizing and ID/OD discrimination should be the more convenient and appropriate approach, unless thinning or corrosion is the NDT goal.

 
 Reply 
 

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