backing ring

backing ring

[′bak·iŋ ‚riŋ]
(engineering)
A strip of metal attached at a pipe joint at the root of a weld to prevent spatter and to ensure the integrity of the weld.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

backing ring

A backing in the form of a ring, used during the welding of piping at butt joints.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The spacing pegs located radially around the backing ring were removed before joint set-in.
The dust seal is affixed to the backing ring in this improved assembly, thereby allowing the hydraulic system to extract the entire assembly back from the rotor end.
Seals include Nitrile O-rings with Teflon backing rings or several optional seal materials, including Ethylene-Propylene, Viton and Neoprene.
In service, installation takes place on the same backing rings used with the bronze.