from
The Collaborative International Dictionary of English v.0.48
Flange \Flange\ (fl[a^]nj), n. [Prov. E. flange to project,
flanch a projection. See {Flanch}, {Flank}.]
1. An external or internal rib, or rim, for strength, as the
flange of an iron beam; or for a guide, as the flange of a
car wheel (see {Car wheel}.); or for attachment to another
object, as the flange on the end of a pipe, steam
cylinder, etc. --Knight.
[1913 Webster]
2. A plate or ring to form a rim at the end of a pipe when
fastened to the pipe.
[1913 Webster]
{Blind flange}, a plate for covering or closing the end of a
pipe.
{Flange joint}, a joint, as that of pipes, where the
connecting pieces have flanges by which the parts are
bolted together. --Knight.
{Flange rail}, a rail with a flange on one side, to keep
wheels, etc. from running off.
{Flange turning}, the process of forming a flange on a
wrought iron plate by bending and hammering it when hot.
[1913 Webster]