OFTEC Oil Storage Tank Regulations 2

Question 1

What type of base is required for a plastic oil storage tank?

Accepted Answer

A level, non-combustible base extending 300mm beyond the tank on all sides

Answer

Plastic oil tanks require a firm, level, non-combustible base (typically a concrete slab) that extends at least 300mm beyond the tank footprint on all sides. This prevents settlement, provides stability, and offers fire protection from ground level.

Question 2

What is an integrally bunded oil tank?

Accepted Answer

A tank with a built-in secondary containment wall forming a tank-within-a-tank

Answer

An integrally bunded tank has the secondary containment built into its construction — essentially a tank within a tank. This eliminates the need for a separate bund wall and is popular for domestic installations where space is limited.

Question 3

What is the minimum distance an oil tank must be from a non-fire-rated building if a fire barrier wall is NOT installed?

Accepted Answer

1.8 metres for a plastic tank

Answer

Without a fire barrier, a plastic oil tank must be at least 1.8 metres from a non-fire-rated building. Steel tanks require 1.0 metre. These distances can be reduced with an appropriate 30-minute fire-rated barrier wall.

Question 4

What must be installed on the oil supply pipe where it passes through or under a building?

Accepted Answer

A fire valve externally and the pipe must be in a protective sleeve

Answer

Where an oil supply pipe enters or passes under a building, a fire valve must be installed on the external side. The pipe should also be sleeved where it passes through walls or floors to allow for thermal movement and leak detection.

Question 5

What device should be installed on the fill point of a domestic oil storage tank?

Accepted Answer

An overfill prevention device (such as a tank gauge or electronic alarm)

Answer

An overfill prevention device is required to prevent the delivery driver from overfilling the tank. This can be an electronic gauge with alarm, a mechanical float gauge, or a whistle vent that changes tone as the tank fills.

OFTEC Practice Test

OFTEC Practice Test

OFTEC Oil Storage Tank Regulations 2