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: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Tadic, Miroslav
Sent: Monday, October 19, 2015 11:00 AM
To: materials-welding@googlegroups.com
Subject: RE: [MW:23752] MT before or after PWHT?
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.
| From: Urdiansyah Sent: Δευτέρα, 19 Οκτωβρίου 2015 - 07:42 To: Materials & Welding Reply To: materials-welding@googlegroups.com Subject: [MW:23742] MT before or after PWHT? |
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
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