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- since 1996 -
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Technical Discussions
vijaykumar
Saudi Arabia, Joined Jan 2018, 1

vijaykumar

Saudi Arabia,
Joined Jan 2018
1
01:49 Jan-14-2018
RFET OR MFL

Dear friends

Can any one help where i can prefer MFL and RFET. In both techniques which method i will choose for tube inspection?

Regards
Vijaykumar eatukuri

 
 Reply 
 
Anmol Birring
Consultant,
Birring NDE Center, Inc., USA, Joined Aug 2011, 747

Anmol Birring

Consultant,
Birring NDE Center, Inc.,
USA,
Joined Aug 2011
747
04:21 Jan-14-2018
Re: RFET OR MFL
In Reply to vijaykumar at 01:49 Jan-14-2018 (Opening).

REFET will detect wall loss in tubes. I don't see any advantage of using of MFL

 
 Reply 
 
Bruce McPherson
Consultant
MFL Services, United Kingdom, Joined Mar 2009, 26

Bruce McPherson

Consultant
MFL Services,
United Kingdom,
Joined Mar 2009
26
12:48 Jan-15-2018
Re: RFET OR MFL
In Reply to vijaykumar at 01:49 Jan-14-2018 (Opening).

It largely depends on the type of tubes you intend to inspect.
My experience is mainly in oilfield tubulars (drill pipe, casing and tubing) where MFL is the accepted technique. There are several standards from API, TH Hill and others which set out the requirements for performing MFL inspection on these types of tubes.
I m not aware of any standards for the inspection of oilfield tubulars which reference the RFET method.

Best Regards

Bruce McPherson
ASNT Level III 70635

 
 Reply 
 
Llack Elvar Rodriguez Ponce
NDT Inspector,
TyT Ingenieria, Argentina, Joined Jan 2018, 3

Llack Elvar Rodriguez Ponce

NDT Inspector,
TyT Ingenieria,
Argentina,
Joined Jan 2018
3
21:57 Jan-16-2018
Re: RFET OR MFL
In Reply to vijaykumar at 01:49 Jan-14-2018 (Opening).

Dear friends
We need more information to give one answer. For example. Diameter of tube, normal wall thickness, material, equipment (heat exchanger, boiler, other) require tubes cleaning, and the two more important things, time to do the inpection and type o flaw (local wall loss or general wall loss).

 
 Reply 
 
kalaivanan
NDT Inspector, ASNT LEVEL III
TNDT, Thailand, Joined Feb 2016, 76

kalaivanan

NDT Inspector, ASNT LEVEL III
TNDT,
Thailand,
Joined Feb 2016
76
02:36 Jan-17-2018
Re: RFET OR MFL
In Reply to Llack Elvar Rodriguez Ponce at 21:57 Jan-16-2018 .

RFET - The field developed by the probe was send to remote from Tube ID to OD and the tube condition acquired in far zone coil. so if has any parameter's like baffle or fin in the tube OD side RFET is limited, well effective for volumetric measurement on bare tubes.

MFL- Uses Permanent magnets to saturate the tube not affected by parameter's like baffle or fin. effective on fin cooler inspection and sizing differ with probe speed, *require const. pulling speed during inspection.

 
 Reply 
 
Nvash Sankar
Nvash Sankar
14:43 Jan-18-2018
Re: RFET OR MFL
In Reply to kalaivanan at 02:36 Jan-17-2018 .

dear kalai,
if there any standers is there to select method RFET and MFL or depend upon technician

 
 Reply 
 
kalaivanan
NDT Inspector, ASNT LEVEL III
TNDT, Thailand, Joined Feb 2016, 76

kalaivanan

NDT Inspector, ASNT LEVEL III
TNDT,
Thailand,
Joined Feb 2016
76
03:58 Jan-19-2018
Re: RFET OR MFL
In Reply to Nvash Sankar at 14:43 Jan-18-2018 .




For selection does't have any ASME or any other, but has some Supplier Documents from Olympus and eddyfi.
 
 Reply 
 
Louis
Other,
Eddyfi, Canada, Joined May 2013, 31

Louis

Other,
Eddyfi,
Canada,
Joined May 2013
31
14:15 Jan-19-2018
Re: RFET OR MFL
In Reply to Nvash Sankar at 14:43 Jan-18-2018 .

Hello,

To determine the adequate tubing inspection technique, you can use the "Tubing probe creator". You can specify the parameters of the tubes and it will suggest the probe that is best suited. Not only the ideal probe size; it has a "smart" algorithm suggesting the most appropriate technique(s) for the given tube material, thickness, presence of fins, etc. E.g. ECT, ECA, RFT, NFT, NFA, MFL, Saturation ECT, etc. (IRIS is a separate technique, not covered by the tubing probe creator)

The tubing probe creator is accessible here:
https://www.eddyfi.com/tubing-probe-creator/

I hope this helps. We have designed this so anybody can use it.
Hopefully it will make your life easier.

You can also have an overview of the capabilities of the various tubing inspection techniques (application/detection/sizing) on this webpage: https://www.eddyfi.com/applications/tubing-applications/

All the best! Louis

 
 Reply 
 

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