The fuel pipe shall be connected to the top of the tank except for which circumstances?

Connecting the fuel pipe to the top of the tank is generally the standard practice for most fuel tanks, as it helps ensure proper fuel delivery and minimizes the risk of leaks or other issues associated with bottom connections. However, for tanks of 330 gallons or less, the regulations may allow for exceptions due to the design and operational considerations of smaller tanks. These tanks can be configured differently due to their capacity, allowing for connections that may not strictly adhere to the typical top connection preference.

For smaller tanks, there may also be specific industry practices or regulations designed to optimize their function while still adhering to safety standards. This flexibility in the connections helps accommodate the varying designs and uses of smaller fuel tanks.