Low pressure storage tanks have pressures in which range?

Low pressure storage tanks have pressures in which range?

• A. 0.5 to 15 psi
• B. 0 to 1 psi
• C. 15 to 30 psi
• D. 100 to 200 psi

Answer: (A)

Low-pressure storage tanks are designed to operate at modest pressures to keep liquids stable and allow safe venting. Their service pressure is typically between 0.5 and 15 psi. The lower bound avoids true vacuum inside the tank, which can cause structural issues and hinder flow; the upper bound keeps the vessel within the low-pressure category, avoiding the much more stringent design, testing, and relief requirements of higher‑pressure containers. Pressures well above 15 psi would place the equipment in a different class (high‑pressure or other higher‑pressure types) and require different safety features. Ranges like 0 to 1 psi are not the standard low‑pressure definition, while 15 to 30 psi or 100 to 200 psi exceed what is defined as low pressure.

Low-pressure storage tanks are designed to operate at modest pressures to keep liquids stable and allow safe venting. Their service pressure is typically between 0.5 and 15 psi. The lower bound avoids true vacuum inside the tank, which can cause structural issues and hinder flow; the upper bound keeps the vessel within the low-pressure category, avoiding the much more stringent design, testing, and relief requirements of higher‑pressure containers. Pressures well above 15 psi would place the equipment in a different class (high‑pressure or other higher‑pressure types) and require different safety features. Ranges like 0 to 1 psi are not the standard low‑pressure definition, while 15 to 30 psi or 100 to 200 psi exceed what is defined as low pressure.