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  • Users: zrzr
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  1. zrzr

    Control Valve Dimension

    Good day guys, Can you guys point me to the right standard whereas I can refer the dimension (flange to flange) for a control valve? Usually, I will refer to ANSI/ASME 16.34 for other valves, but for control valves, there seems to be no exact standard for it. Should I refer to the same...
  2. zrzr

    Differential Pressure switch requirement

    Good day everyone, Do you guys know which standard should I refer to for living quarters design? The thing is, we're doing a retrofit job for a living quarters here. I came across a differential pressure switch which is located only at the Control Room inside the living quarters.. and not at...
  3. zrzr

    Level measurement using dP cell transmitter

    Hey guys, I'm wondering if anyone can refer me to the correct ways of dP cell transmitter installation. The scenario is that I have a vent stack which has a glass type level gauge to monitor the level of water in the vent stack. (Water is used to isolate the process line to atmospheric) I'm...
  4. zrzr

    What is a fail safe design?

    Guys, I have been wondering, what do people mean by designing a fail-safe design e.g. shutdown system? I've give it a scenario. Is it : a) When there is a power/supply failure in a system, all the shutdown system will go into a safe state, whereas shutdown valves shall be closed and blowdown...
  5. zrzr

    Cables screen & drain wires. Collective or individual screen?

    Good day everyone, I came across this cable specification which is coded I2 and I4. These cables are pair cables having the same materials. Then, I noticed that for I2 cables, the screen of the cables are collective screen while I4 cable are having individual screen for each pair. My question...

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