riser pipeline vs piping

riser pipeline and piping both are nouns.

Word	Noun	Adjective	Verb	Adverb
riser pipeline	Yes	No	No	No
piping	Yes	No	No	Yes

As nouns, piping is a hypernym of riser pipeline; that is, piping is a word with a broader meaning than riser pipeline:

riser pipeline: a vertical pipe in a building
piping: a long tube made of metal or plastic that is used to carry water or oil or gas etc.

Other hypernyms of riser pipeline include pipage, pipe.

riser pipeline (noun)	piping (noun)
a vertical pipe in a building	playing a pipe or the bagpipes
	a long tube made of metal or plastic that is used to carry water or oil or gas etc.
	a thin strip of covered cord used to edge hems

riser pipeline (adverb)	piping (adverb)
	(used of heat) extremely