noun
folding chair with tubular metal frame
A lightweight, stackable chair with a metal tube frame, often used in schools, community centers, and event halls.
会場にはパイプ椅子が並べてあった。
Folding chairs were lined up in the venue.
パイプ椅子をたたんで倉庫にしまった。
I folded up the folding chairs and put them away in the storeroom.
A general term for any folding chair; パイプ椅子 specifically refers to the common metal-tube type.
From パイプ (pipe) + 椅子 (chair), referring to the tubular metal frame.