SRU vessels can be refractory lined with multilayer refractory systems of brick, castable and plastics. Hotwork has performed refractory dryouts on numerous SRU vessels such as thermal reactors (reaction furnaces), Scot reactors, waste heat boilers, condensers, converters and incinerators. Thermal reactor dryouts often require temperatures exceeding 2000F (1100C) while most other SRU vessels containing insulating materials seldom exceed 1000F (540C) for the dryout.