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  • Users: Genetix
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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

    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.
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. Genetix

    Interpretation VIII-1-95-50

    My understanding of the interpretation is that you cannot conduct heat treatment of heads with extreme fiber elongation > 5% prior to welding it to shell section. Is it correct? If that's the case, for a long vessel with PWHT not required as per material and thickness, you would have to heat...
  9. Genetix

    ASTM A106 section 4.4

    Hi everyone, Im currently studying ASTM A 106 specifications. On section 4.4 it is specified that "Unless otherwise specified, pipe NPS 2 [DN 50] and over shall be furnished hot finished. When agreed upon between the manufacturer and the purchaser, it is permissible to furnish cold-drawn pipe"...

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