Final answer:
Oil tank pipes must have at least one copper pipe and can have two copper pipes for burner connections. Galvanized steel pipes can be used to provide protection against corrosion.
Step-by-step explanation:
An oil tank must have at least one copper pipe and can have two copper pipes for burner connections. Copper pipes are commonly used in plumbing due to their high thermal conductivity and resistance to corrosion.
Oil tank pipes need to be protected from damage to ensure the safe and efficient delivery of oil. One way to protect pipes is by using galvanized steel pipes, which have a protective layer of zinc to prevent corrosion.