Multi-branch fitting and method of fabricating

摘要

A lined multi-branch fitting and method of making a lined multi-branch fitting having a plurality of individual confronting housing members assembled about a one-piece, multi-branch, heat degradable liner. The confronting ends of the metal housing members are welded together via a fillet weld. One of the confronting ends includes a radially inner male insulating projecting strip which abuts the liner and insulates the liner from weld heat applied to the other confronting ends. The other confronting end includes a terminal end slot which receives the male insulating projecting strip; the one confronting end includes a radially outer weld recess for receiving an annular fillet weld bead.