petrol line vs pipage

petrol line and pipage both are nouns.

Word	Noun	Adjective	Verb	Adverb
petrol line	Yes	No	No	No
pipage	Yes	No	No	No

As nouns, pipage is a hypernym of petrol line; that is, pipage is a word with a broader meaning than petrol line:

petrol line: a pipe that carries gasoline from a tank to a gasoline engine
pipage: a long tube made of metal or plastic that is used to carry water or oil or gas etc.

Other hypernyms of petrol line include pipe, piping.

petrol line (noun)	pipage (noun)
a pipe that carries gasoline from a tank to a gasoline engine	a long tube made of metal or plastic that is used to carry water or oil or gas etc.
	a fee charged for the use of pipes