Patent ID: 6286337
Filing Date: 2001-09-11
Classification: C03B,C03C

Abstract:
A tubing system for conveying a molten material through a vacuum housing, the tubing system comprising:a tubing having a plurality of convolutions which compress as the tubing expands;a plurality of projections disposed along a length of the tubing, the projections for carrying the electrical current which heats the tubing;a plurality of refractory insulation bricks stacked between the projections;a first seal flange coupled to an inlet end of the tubing; anda second seal flange coupled to an outlet end of the tubing;wherein each seal flange comprises:a metal seal ring adapted to be coupled to the base of the vacuum housing so as to make a sealed contact with the base of the vacuum housing; anda refractory seal block coupled to the metal seal ring and the tubing, the refractory seal block for transferring the expansion force of the tubing to the metal seal ring, thereby causing the convolutions to compress.