Piping (sewing)

In sewing, piping is a type of trim or embellishment consisting of a strip of folded fabric so as to form a "pipe" inserted into a seam to define the edges or style lines of a garment or other textile object.

Piped pocket openings, garment edges, and seams are characteristic of Western wear.

[2] Piping is used extensively on the cassocks of clergy in western rite Christianity, particularly in the Roman Catholic and Anglican churches.

In the Roman Catholic church, cassock piping is: black for priests; purple for chaplains of His Holiness; amaranth red for bishops, protonotaries apostolic, and Honorary Prelates; and scarlet red for cardinals.

[3] In the Anglican church, piping is not used universally, many clerics preferring a plain cassock of solid colour.