What is the typical pressure range for all non-pressure fixed facilities?

What is the typical pressure range for all non-pressure fixed facilities?

• A. 5-15 psig
• B. 0-0.5 psig
• C. 0-5 psig
• D. 10-20 psig

Answer: (B)

Non-pressurized fixed facilities are designed to operate essentially at atmospheric conditions, so the pressure inside is kept near zero gauge. Gauge pressure measures how much above atmospheric pressure the system is, and 0 psig means exactly atmosphere. In these facilities, only small fluctuations occur due to temperature changes or minor venting, so the typical range stays very close to zero. That’s why 0-0.5 psig best fits—the others imply meaningful pressurization (higher internal pressures) that isn’t characteristic of non-pressure fixed facilities.

Non-pressurized fixed facilities are designed to operate essentially at atmospheric conditions, so the pressure inside is kept near zero gauge. Gauge pressure measures how much above atmospheric pressure the system is, and 0 psig means exactly atmosphere. In these facilities, only small fluctuations occur due to temperature changes or minor venting, so the typical range stays very close to zero. That’s why 0-0.5 psig best fits—the others imply meaningful pressurization (higher internal pressures) that isn’t characteristic of non-pressure fixed facilities.