Differential Pressure switch requirement

[zrzr]

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 the other locations within the LQ. Initially, we proposed to expand the LQ but after a few meetings, we've decided to install porta cabins instead to accomodate 10-20 pax. So my question is that,

1. Do we need a differential pressure switch for our porta cabin and signal tie in to HVAC panel?

2. Based on the existing system, why is the dp switch installed only in the control room and yet the room's are seperated into different partitions? Any particular reason?

 

[DRWeig]

zrzr,

Much more info needed, please... Why do your living quarters have a control room? Is this on a ship or offshore oil rig?

What does the differential pressure switch that's there now do? In other words, why is it there?

Please give enough info so we can visualize your installation.

Good on ya,

Goober Dave

 

[zrzr]

DRweig,

This is an offshore platform whereas they are accommodating the radio room as part of their control room where they've installed their DCS, FGS, telecoms cabinets etc.

The reason for having the DP switch is that to keep the living quarters pressurized. I am just curious that why would they only have the DP switch at the Control room / Radio room? I see that the CCR is also located in the living quarters..

The DP switch will compare the outdoor pressure and the LQ pressure.

 

[DRWeig]

Hi again,

There may be a good reason to only have one DP check -- for example, if the living quarters are not directly adjacent to a classified area?

You really need to analyze the layout of all the walls, doors, and areas where hazardous gases could exist. I'm thinking of an example in which only the control room's exterior abuts a hazard, and any air from the hazardous area that could possibly reach the living quarters would have to pass through the control room. In this case, only the control room pressure really matters.

I'd suggest talking to the engineer who did the area classifications and specified the positive-pressure areas to begin with -- over a set of as-built plans.

Your question is a little too complex to answer here, we can't see your site.

Good on ya, and let us know what you find out!!

Best,

Goober Dave