MIL-DTL-15606J, DETAIL SPECIFICATION: BRICKS, REFRACTORY, AND BURNER TILE, NAVAL BOILER FURNACE LINING QUALITY (09-MAY-2012)[SUPERSEDING MIL-B-15606H]

MIL-DTL-15606J, DETAIL SPECIFICATION: BRICKS, REFRACTORY, AND BURNER TILE, NAVAL BOILER FURNACE LINING QUALITY (09-MAY-2012)[SUPERSEDING MIL-B-15606H]., This specification covers refractory brick and burner tile and lining for Naval boiler furnaces. Refractory brick will be of the following grades, as specified (see 6.2). Applicable ASTM C27 Group Classification is shown in parenthesis. Grade AA – 65 to 90 percent Alumina (High Alumina); Grade A – Alumina (60 percent High-Alumina); AND Grade B – Super Duty (Fireclay Brick).