MT before or after PWHT?
Urdiansyah
Dear Expert,
Currently I work at fabricator of Pressure vessel and Heat exchanger,
During Renewal ASME, AI question about MT shall be done before or after PWHT ?
Kindly advice for this matter
Thank you for answered,
Best Regards,
Urdiansyah
Engineering PIC
PT.Daekyung Indah Heavy Industry
Cilegon Plant :
Jl. Australia II Kav. K1 Kawasan Industri (KIEC)
Cilegon 42443, Banten - INDONESIA
Mohd Azam
As a good engineering practice and Final product (After PWHT) shall be carried out MT
Thanks
Azam
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Ramdoss Ravindiren
It is bettter to do after PWHT, so that after stresses are relieved, surface cracks can be detected, if any....
Regards
Ram
From: Mohd Azam
Sent: 19-10-2015 10:24 AM
To: material...@googlegroups.com
Subject: Re: [MW:23744] MT before or after PWHT?
Kannayeram Gnanapandithan
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Urdiansyah
Thank you for the answers,
I agree with your answer that commonly MT is done after PWHT.
But in some condition MT shall be done before PWHT,
Still looking for this condition? In which CODE
Thanks,
Urdi
george....@gr.bureauveritas.com
| From: Urdiansyah Sent: Δευτέρα, 19 Οκτωβρίου 2015 - 07:42 To: Materials & Welding Reply To: material...@googlegroups.com Subject: [MW:23742] MT before or after PWHT? |
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c sridhar
C Sridhar.
From: Ramdoss Ravindiren <rdos...@gmail.com>
To: "material...@googlegroups.com" <material...@googlegroups.com>
Sent: Monday, 19 October 2015 10:49 AM
Subject: RE: [MW:23745] MT before or after PWHT?
Tadic, Miroslav
Considering money in END final costs, and that MT is relativity cheap, you could use MT before and after PWHT
So, both examination can help you to verify any indication
That’s my recommendation and in your place, I schedule END in that way
Best regards
Miroslav Tadic
Integrity Enginner
CEE
Gerencia de Producción - Mantenimiento
YPFB Chaco S.A.
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Jim Price
Below information can be found on the National Board website.
http://www.nationalboard.org/index.aspx?pageID=164&ID=377
Advantages and Disadvantages of Using Magnetic Particle Examination
Advantages:
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Can detect both surface and near-surface indications.
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Surface preparation is not as critical compared to other NDE methods. Most surface contaminants will not hinder detection of a discontinuity.
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A relatively fast method of examination.
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Indications are visible directly on the surface.
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Low-cost compared to many other NDE methods.
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A portable NDE method, especially when used with battery-powered yoke equipment.
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Post-cleaning generally not necessary.
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A relatively safe technique; materials generally not combustible or hazardous.
-
Indications can show relative size and shape of the discontinuity.
- Easy to use and requires minimal amount of training.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/B1C5C970BEA29243935FA5EB72F113C80208ECFF3B%40BOLEXVSG11.chaco.com.bo.
Jim Price
RT before PWHT is what one company, I know of performs and MT after PWHT.
I Googled to find the depth of flaw detection and below is the response I received.
(I thought it was 1/8” but wanted to find out for sure before responding.)
Q: What is the maximum depth that magnetic particles can detect a discontinuity?
A: 1/4 inch, however 0.050 to 0.100 inch is a more realistic depth.
Detection will depend on current AC or DC and wet or dry.
Best Regards
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Tadic, Miroslav
Sent: Monday, October 19, 2015 11:00 AM
To: material...@googlegroups.com
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