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  1. Genetix

    Timing of DFT inspection and Water spray test for Thermal Spray Aluminum

    Dear respected TSA expert, Im new to TSA and have been reading several specifications. However, i can not see any specification specifying the timing of inspections for TSA DFT measurement and water spray test. My undestanding of inspection sequence is as follows: TSA Coating -> DFT check...
  2. Genetix

    MDMT allowable range.

    Dear respected experts. I would like to inquire about the following problem. I have a vessel with MDMT -46 deg C CS Carbon steel PQR only specifies impact test at -45 deg C. (only 1 deg C difference) I wonder if PQR is acceptable to be used on the vessel. Is there some provisions in the...
  3. Genetix

    Vessel field pneumatic testing with piping together

    @ A Clark. I acknowledge your correction, sorry my bad.
  4. Genetix

    Vessel field pneumatic testing with piping together

    @MJCronin, Nice post! @Jtseng, What I said are based on experience. I'm from contractor side and so far our client agrees on full NDE + leak test. By the way for the piping lines which does not allow flanges for connections, we normally pressure test the piping line first by extending the...
  5. Genetix

    Vessel field pneumatic testing with piping together

    "quote" Note that regardless using air or water, we are not altering the test stress at the vessel during re-testing, "unquote" Hydrotest at shop vs hydrotest at site is different for skirt supported vessels. Stresses will be different since hydrotest at site is at erected condition. If in case...
  6. Genetix

    Vessel field pneumatic testing with piping together

    Based on your original post, you may be talking about golden joints right? Pressure vessel fabricator was able to hydrotest the vessel by extending the spool and adding temporary flange for hydrotest purposes and the cut the temporary flange and additional pipe spool after hydrotest acceptance...
  7. Genetix

    GTAW WPS filler Wire size

    Yes
  8. Genetix

    GTAW WPS filler Wire size

    Hi, What is the reference code for WPS qualification? If the qualification of welding procedure is based on ASME Section IX, you do not need to qualify a new WPS if the diameter of filler wire changes because it is a non-essential variable.
  9. Genetix

    DC welding

    Hi respected welding engineers. In SMAW DC welding: DCEN = shallow penetration DCEP = deep penetration IN GTAW DCEN = deep penetration DCEP = shallow penetration Can someone explain why DC polarity effect is different for SMAW and TIG. Thank you very much.
  10. Genetix

    Location of notch as per UG-84(g) for impact test specimen

    Thank you very much for all inputs. I appreciate it.
  11. Genetix

    Location of notch as per UG-84(g) for impact test specimen

    Hi guys, I have found a picture on ASME Section II Part C as shown, I guess this should be the correct orientation. As per UG-84(g) "Each set of weld metal impact specimens shall be taken across the weld with the notch in the weld metal. Each specimen shall be oriented so that the notch is...
  12. Genetix

    Location of notch as per UG-84(g) for impact test specimen

    Dear respected experts of this forum. I would like to get some insight regarding UG-84(g) of ASME Section VIII Division 1. The words "normal to the surface" for the location of the notch confuses me. Could you please advice which is the correct location of the notch as per uploaded image...
  13. Genetix

    UG-85(b)

    Sorry my bad. Im referring to UCS-85(b) not UG-85 :(
  14. Genetix

    UG-85(b)

    Dear respected experts, I would like to have an inquiry regarding the definition of heat treatment as per UG-85(b) of ASME BPVC Sec VIII Division 1. As per UG-85(b). Heat treatment for carbon and alloy steel is considered as thermal treatment exceeding 480°C. I'm just curious where this do...
  15. Genetix

    Supplementary coupon of PQR

    As per QW-403.6, the minimum base metal thickness qualified is the thickness of Test Coupon T or 5/8" (16mm) whichever is less. In your case 12.70mm test coupon thickness shall be the minimum base metal thickness qualified. WPS may get total base metal thickness range of 12.7mm to 66.64mm with...
  16. Genetix

    QW-193 - Base metal representing cladding material

    Dear everyone, Qw-193 specify - "The cladding may be represented by the base material of essentially equivalent chemical composition to the cladding composition.essentially equivalent chemical composition" The question is how to confirm if cladding material chemical composition is essentially...
  17. Genetix

    Dimensional Control During Welding

    Good afternoon respected members of this forum, We had an LL (Lessons Learned) discussion for one of our previous project. One of the LL is about the lateral discrepancy of the interconnecting nozzle (on channel head) of stacked heat exchangers (2 BEU type). Lateral discrepancy is out of...
  18. Genetix

    Interpretation VIII-1-95-50

    The reply on (2) specify that the heat treatment temperature and time as per UCS-56 can satisfy the requirement of UCS-79.
  19. Genetix

    ASME Section 8 Div 1

    10 psig is the maximum operating pressure. How about the design pressure. If design pressure is less than 15 psig then the vessel class is not included in the scope of ASME Sec. VIII, however, U-1(c)(2) specify that any pressure vessel which meets the applicable requirement of ASME Sec VIII may...
  20. Genetix

    Interpretation VIII-1-95-50

    Thanks metengr [glasses]

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