OFTEC Oil Pipework and Supply Systems 2

Question 1

What colour is MDPE (medium-density polyethylene) pipe approved for oil supply use in the UK?

Accepted Answer

Black

Answer

Black MDPE pipe is approved for oil supply use in the UK; yellow MDPE is used for gas distribution and blue MDPE is used for potable water supplies.

Question 2

What is the minimum depth of cover required for buried oil supply pipework under a non-trafficked area such as a garden?

Accepted Answer

450mm

Answer

Under non-trafficked areas, a minimum cover of 450mm is required for buried oil supply pipework to provide adequate protection from accidental damage.

Question 3

What minimum depth of cover is required for buried oil supply pipework passing under a driveway or other trafficked area?

Accepted Answer

600mm

Answer

Buried oil supply pipework under driveways or trafficked areas requires a minimum cover of 600mm to provide protection against damage from vehicle loads.

Question 4

Which type of joint is NOT suitable for use in buried oil supply pipework?

Accepted Answer

Soldered (capillary) joints on copper tube

Answer

Soldered (capillary) joints are not suitable for buried oil pipework as they can fail under ground movement stresses and are not approved for underground oil service.

Question 5

When oil supply pipework passes through a wall or floor, what protection must be provided?

Accepted Answer

A sleeve to protect the pipe and allow for thermal movement

Answer

Oil supply pipework must be enclosed in a sleeve when passing through walls or floors to protect it from physical damage and to accommodate thermal expansion and contraction.

OFTEC Practice Test

OFTEC Practice Test

OFTEC Oil Pipework and Supply Systems 2