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Recent content by kondori

  1. kondori

    Inadequate PWHT holding time for Carbon Steel piping in caustic service (NACE SP-0403)

    Thank you for your reply. The fluid design temperature is 50C. We have electrical tracing + insulation to keep the temperature at this level.
  2. kondori

    Inadequate PWHT holding time for Carbon Steel piping in caustic service (NACE SP-0403)

    Thank you, Andrew. Option No. 3 seems to be the most reasonable solution. I will propose options 2 & 3 to the project management (so they choose option No.3).
  3. kondori

    ASME QG-106.4

    We had four EPC contractors for our process plant project, and we did this. We made a database of all WPSs required and identified those WPSs which were common among EPC contractors. This way, we reduced the number of WPS/PQRs required. After approval, they were allowed to use any of those WPSs...
  4. kondori

    Inadequate PWHT holding time for Carbon Steel piping in caustic service (NACE SP-0403)

    Thank you all for your replies. For clarification, this is where we are at the moment: We are the owner of the plant (Quality Dep.) Caustic concentration and metal temperature show the welds to be in Area B of Figure 1 of NACE SP-0403. Additionally, our specification requires PWHT at 630C for...
  5. kondori

    Inadequate PWHT holding time for Carbon Steel piping in caustic service (NACE SP-0403)

    Thank you, EdStainless, for your reply. Update: Today, I found out that originally, they have been following the specification and performing PWHT acc. to NACE SP-0403. The reason why they have changed things and reduced the holding time & temperature has been due to excess distortion and...
  6. kondori

    Inadequate PWHT holding time for Carbon Steel piping in caustic service (NACE SP-0403)

    Our PWHT meets the requirements of ASME B31.3. That's not the issue. The issue is that we did not meet the NACE SP-0403 requirements.
  7. kondori

    Inadequate PWHT holding time for Carbon Steel piping in caustic service (NACE SP-0403)

    Dear all, We have a situation in our project (petrochemical plant construction) where in our caustic service piping (mostly 4-6mm wall thickness and small OD), all the weldments have been post-weld heat-treated, but it has been done acc. to ASME B31.3 (not as per NACE SP-0403 requirements). The...
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