Structural Ceramics for High Temperature Furnace Components: U-Tube Development.Final Report, November 1986-March 1994

摘要

Three different U-tube configurations were fabricated and tested: a monolithictube with tube segments bonded together during firing; a refractory cement tube with segments bonded together after firing with refractory cement; and a mechanical seal tube with tube segments assembled after firing with a vitaulic gasket. The monolithic tube was dimensionally acceptable with a very good thermal shock resistance and leak test results achieved in the laboratory. The one field test performed on this tube resulted in a premature failure due to an upset in the test from a leak of water impinging on the hot tube. The refractory cement tube yielded less than satisfactory leak test results due to cement cracking during thermal cycling.