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  1. waleedarafah

    color code system for Material identification and segregation

    Dear Gents, Help please. I'm a procurement engineer and i;m requested to prepare this document "color code system for Material identification and segregation". for Oil / Gas piping system. could any one help me to get any guide to prepare it
  2. waleedarafah

    PSV flow rate

    Thanks Dejan, I found API 521, after reviewing i understand we use PRV for P/L in two case thermal relief & fire case scenarios.Please advise but i can not find the equation for flow rate calculation in fire case. Could you tell me what is the cases for using PSV in Gas pipeline, and how to...
  3. waleedarafah

    PSV flow rate

    Dear all Could you help me to with any standard , specification to how calculate the flow rate needed for sizing orifice area for pressure safety valves installed on pig trap & pipeline for oil & gas services
  4. waleedarafah

    Double piston effect seat design

    Thank you Littleinch Also the second valve is the same, we understand that thess valves shall be in the other way around. But i need to know if the back pressure "pipeline pressure" down stream the valves can pass the DPE seat or not
  5. waleedarafah

    Double piston effect seat design

    Could you help me on the following query. Our ball valve seat design is one seat SPE "Upstream" and the other seat is DPE "Downstream" . My question is the DPE allow back pressure to pass through valve even the valve in closed position in case the second seat is SPE. (See attached PEFS)...
  6. waleedarafah

    services in storage tank needed fire fighting

    Dear all, could any one help me to find the reference to how determine that there is a cooling or foam system needed or not for storage tanks if i have services likes( prolysis, flux oil, dimethyl disulfide, aromatics extraction solvant, butadiene extraction solvavent, caustic solution...

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