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  1. minibenny

    Duplex A923 Method C Corrosion Test on Chemically Etched Sample

    Thank you, EdStainless.
  2. minibenny

    Duplex A923 Method C Corrosion Test on Chemically Etched Sample

    I'm wondering if someone that has experience with A923 Method C corrosion testing and ASTM E562 ferrite point count testing could provide some insight on how surface prep might affect test results in the following scenario. Scenario: A weld coupon of standard duplex weld (ER2209) and base...
  3. minibenny

    PQR Corrosion Test fail per ASTM A923 Method C

    We have also used 2% nitrogen in the shielding gas after struggling to get acceptable results when using only argon. It appeared to make a significant difference in ferrite and corrosion test results.
  4. minibenny

    ASME IX 2019 QW-288.1

    MrGezus, I wish I could clarify the answer for you, but I agree that there appears to be errors between Table QW-288.1 and the referenced paragraphs. In Table QW-288.1, QW-403.32 is referenced for tube thickness, but QW-403.32 is related to P-No. of the tubesheet or tubesheet cladding. I...
  5. minibenny

    UG-84(h)(3) - Number of Specimens?

    metengr, perhaps I am misunderstanding your reply or the Code paragraphs, but both UG-84(h)(3) and Table UG-84.6 both specify the number of sets required. I understand that 1 set = 3 specimens. UG-84(h)(3) appears to say both 3 sets and 4 sets are required. Which is it? UG-84(h)(3) says...
  6. minibenny

    UG-84(h)(3) - Number of Specimens?

    Thank you for the replies david339933. I found that interpretation when looking into my question also. I thought it was odd that the current Edition of ASME VIII-1 still says (3) sets of specimens required in UG-84(h)(3). I would think it would be changed to say four sets of specimens required...
  7. minibenny

    UG-84(h)(3) - Number of Specimens?

    Hi there, I am having trouble interpreting the requirements of the subject paragraph. The way I interpret it, there seems to be conflicting requirements for the number of sets of specimens required. I'm wondering if someone can provide their interpretation of the number of sets of HAZ and weld...
  8. minibenny

    Tube-to-tubesheet joints with tubesheet T exceed 8"

    ASME Sec. IX, paragraph QW-202.6(a) allows welded tube-to-tubesheet joint to be qualified to QW-202.2 and QW-202.4 (if QW-193.1 isn't mandatory by construction Code). "QW-202.2(b) Qualification for Partial Penetration Groove Welds" says, to my understanding, that there is no maximum thickness...
  9. minibenny

    Tube to Tubesheet Weld Procedure Qualification

    engfla, Yes, this weld would require qualification in accordance with one of the (3) options given in paragraph QW-202.6 of ASME Sec. IX. QW-193 is not mandatory for ASME Section VIII Division 1, to my knowledge.
  10. minibenny

    Application of UG-93(d)(3) for Rectangular Pressure Vessels/Header Boxes

    Thank you for the replies. However, I understanding is the outside exposed edges of the flat after welding require MT or PT. This is per UG-93(d)(4)(-b). UG-93(d)(4)(-a) requires the weld preparation in the flat plate before welding to be MT or PT examined. Does UG-93(d)(4)(-a) apply to both...
  11. minibenny

    Application of UG-93(d)(3) for Rectangular Pressure Vessels/Header Boxes

    I posted a similar thread in another forum, but have not received any responses, so I thought maybe this forum might get more results. Using fig UW-13.2(c) as a reference, I have been under the impression that MPI or LPI requirements of UG-93(d)(3) would only be applicable to the thicker flat...
  12. minibenny

    Application of UG-93(d)(3) for Rectangular Pressure Vessels/Header Boxes

    Can someone provide me with information to where I can find the answer of whether all flat plates of a header box (built to either ASME VIII-1 Appendix 13 or 28) require MPI per UG-93(d)(3)? Using fig UW-13.2(c) as a reference, I have been under the impression that MPI or LPI requirements of...
  13. minibenny

    What primer to use on pressure vessel?

    We have built a spare shell out of mild carbon steel, and would like to apply an external primer to protect it while in storage. Once placed in service, it will be insulated. I don't have the information for which type of insulation will be applied, but I assume it will be clad afterwards. The...
  14. minibenny

    "PP" or "S" stamp required alert...AFTER fabrication??

    Ah, good point. Thanks metengr. It makes sense that NB commissions can be revoked, otherwise neglegence could be an issue. I hadn't really though about that before.
  15. minibenny

    "PP" or "S" stamp required alert...AFTER fabrication??

    I agree with the suggestion from GenB and metengr above. Provide all required documents to your A.I. for review. If you QC Manual states that A.I. shall review these documents prior to commencement of fabrication, then you may have to write an NCR for not following your program, regardless of...
  16. minibenny

    Tubesheet to Shell RT Requirements

    I agree with the answers above, but I just thought I'd add a couple comments. To add to the comment, per UW-12(d) & (e), the joint efficiency on the shell would be 1.0 if UW-11(a)(5)(b) are met (which would not be the case of the above since there are no circumferential seams to shoot), and...
  17. minibenny

    Impact Testing Requirements for Tube-to-Tubesheet WPS

    Oops, I meant to say "Anybody able..." not "Anybody about...."
  18. minibenny

    Impact Testing Requirements for Tube-to-Tubesheet WPS

    Anybody about to tell me if they know of an ASME interpretation which exempts impact testing for a tube-to-tubesheet WPS qualified per QW-193?
  19. minibenny

    Impact Testing Requirements for Tube-to-Tubesheet WPS

    I've can't seem to find a good answer to a few questions I've been trying to solve. I'm hoping someone can lead me in the right direction. Perhaps an ASME interpretation is out there that someone can direct me to... My first question is whether a WPS developed per ASME Sec. IX, QW-193 needs to...
  20. minibenny

    Corrosion Testing of Duplex Tube-to-Tubesheet PQR

    I'm hoping someone can provide some help in regards to some issues we've been having with developing duplex tube-to-tubesheet strength weld procedures per ASME Sec. IX QW-193. The material of the tubes and tubesheets are S31803/S32205 duplex. Tubes are 3/4" OD x 16 gauge. The tubes in the...

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