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  1. dutch1956

    ISA definition clarification

    What is the major differences between "Emergency Shutdown Systems" & "Safety Critical Controls"? And does SILS classification apply to both?
  2. dutch1956

    Flange pressure rating variances

    Are there variances on pressure rating on ANSI flanges. I.E. 3" diameter std 150 class line,,,,C/S <100F,,,,,,,285psi PSV set at 295psi Acceptable or not???
  3. dutch1956

    What issues exist with welding on carbon steel lines that have been in anhydrous HCL service for 25

    Thanks Metengr
  4. dutch1956

    What issues exist with welding on carbon steel lines that have been in anhydrous HCL service for 25

    This line is off-line fully vented.
  5. dutch1956

    What issues exist with welding on carbon steel lines that have been in anhydrous HCL service for 25

    What safety & failure issues do I have to be concerned about on welding on the subject matter above. If welding is not the route can lock ring flanges be used in this service.

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