On 19 Jan, 21:04, Dave wrote:

How do they stop the diesel from going solid in the tanks and pipes?

a) They search back a week in this ng., for a thread on oil boiler
burners.

b) It doesn't. Diesel doesn't "go solid" and what it does do is a
problem for the tiny clearances in some parts of diesel engines, not
for the "tanks and pipes" scale of plumbing.

Besides which, it's colder at altitude and diesel aircraft
successfully addressed these issues in the 1930s.