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Recent content by arshiatabrizian

  1. arshiatabrizian

    NFPA12 declearation

    Dear zxc Im not afraid of venting the gas. Because cylinder's burst disk performs at 190 bars. I want to know how should I hydraulically calculate a system stored in higher temperatures like 40, etc. according to nfpa graphs or should I generates new graphs regarding new temp. all the best Arshia
  2. arshiatabrizian

    NFPA12 declearation

    Hi checopi Im working on a high pressure co2 extinguishing system and nfpa 12 is its standard. Im sure about the standard but i could not to find out the standard meaning in that matter mentioned above.
  3. arshiatabrizian

    NFPA12 declearation

    dear friends, I`m in urgent need for the answer. no body has any idea?!?
  4. arshiatabrizian

    NFPA12 declearation

    Thanks for your answer. I know about that 2 rules. But I have another question. I just want to know about the calculation basis at temperature other than 21C. Should I use other y and z than what mentioned in nfpa? I think if we change the storage pressure the average discharge pressure is...
  5. arshiatabrizian

    NFPA12 declearation

    hello all. the storage temperature of co2 cylinder is mentioned -18 to 54 in nfpa12. on the other hand the calculation in nfpa12 is based on 21C (750psi). also nfpa says: " this pressure has therefore been selected for calculations involving high pressure systems" is it mean that all calculation...

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