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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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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