6 REMOVABLE INSULATION 6.1 Application In SSP plants the following parts will be provided with removable insulation: • Reverse jet filter (top cover) • Cartridge filter (top cover) • Cat vessel (top cover) • Rotary valves (HP and LP) • Block valves • Flanges • Sight glasses • Manholes 6.2 Type Insulation In case of uncomplicated configurations removable caps will be applied. The selection of the insulation materials for the removable caps will be the same as stated under paragraph 4. In all other cases of complicated configurations insulating jackets (or equivalent) can be applied as long as chemical attack or heat damage of the jacket will not be a problem.