Vents for floating roof tanks are located between which components?

Vents for floating roof tanks are located between which components?

• A. Tank bottom and Tank top
• B. Floating Roof and Actual Roof
• C. Inner wall and Outer wall
• D. Ground and Roof

Answer: (B)

In a floating roof tank, there is an annular space between the floating roof and the fixed (actual) roof. Vents are placed in that space to vent vapors and to equalize pressure as the floating roof moves up and down with the liquid level. This prevents pressure differences that could stress or trap air between the roofs and helps control vapor emissions from the stored product. The other options don’t fit because the venting needs to occur between the two roofs, not between the tank bottom and top, the inner and outer walls, or between the ground and the roof.

In a floating roof tank, there is an annular space between the floating roof and the fixed (actual) roof. Vents are placed in that space to vent vapors and to equalize pressure as the floating roof moves up and down with the liquid level. This prevents pressure differences that could stress or trap air between the roofs and helps control vapor emissions from the stored product. The other options don’t fit because the venting needs to occur between the two roofs, not between the tank bottom and top, the inner and outer walls, or between the ground and the roof.