Hi,
Please see the highlighted text. It does not say what technique was adopted. PMI could be done by XRF and OES techniques. Assuming this was done by XRF, this technique could yield erratic results. More number of spots/reading, better is the accuracy. How many spots were taken?
If would be advisable to test the sample with both XRF and OES and then come to conclusions
Also see below the recommendations from API-578 and act accordingly.
Thanks.
P.Goswami.P.Eng, IWE.
Independent Welding & Metallurgical Specialist
Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/
Email:pgoswami@quickclic.net,pradip.goswami@gmail.com
Cell/Whasapp:1-905-9793232
7 Evaluation of Testing Results
7.1 Material Acceptance Methods
The owner/user may elect any one of the following methods of material acceptance.
a) Materials can be confirmed to contain the nominal amounts of alloying elements specified in the relevant
materials specification (e.g. ASME Section II or ASTM specifications).
b) Materials can be classified through a qualitative sorting technique (see 6.7) to establish the conformance
with the intended material.
c) When PMI indicates that alloying elements are outside the ranges indicated in the material specification,
the owner/user may still choose to allow the use of the tested materials in situations where a person
knowledgeable of the appropriate damage mechanisms confirms that the material will perform
satisfactorily in the service.
d) If testing using one of the portable or qualitative analysis methods leads to the potential rejection of a
component, a more accurate analysis may be used to determine component acceptance (see
Section 6).
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kannayeram Gnanapandithan
Sent: March 29, 2019 7:39 AM
To: materials-welding <materials-welding@googlegroups.com>
Subject: Re: [MW:29418] PMI Testing -ss316
Ref ASME SEC I, Non Mandatory Appendix B,
THANKS & BEST REGARDS,
KG.PANDITHAN, BE, IWE, CSWIP 3.1,
ASNT-Level II in PT,MT,RT & UT,
International Welding Engineer.
CONSULTANT-WELDING & QUALITY
Materials shall contain the amount of
alloying elements specified in the
applicable ASME/ASTM specification.
Alloy materials, alloy castings and alloy
welding filler materials (tested in their
raw form or with the alternative described
in para. 5.7) shall be acceptable under this
procedure if each of the major alloy
elements is detected to have a value no
less than 10% below the minimum value
nor more than 10% above the maximum
value specified by the governing material
specification
According this your material is accepted
On 28 Mar 2019 3:51 pm, "Kannayeram Gnanapandithan" <kgpandithan@gmail.com> wrote:
what is the tolerance for PMI values
THANKS & BEST REGARDS,
KG.PANDITHAN, BE, IWE, CSWIP 3.1,
ASNT-Level II in PT,MT,RT & UT,
International Welding Engineer.
CONSULTANT-WELDING & QUALITY
--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.
--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.
--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to
.
.
.