Low Temperature Board

Installation & Design Considerations

• Boards used for maximum operating temperatures up to 250 degrees F.
• Type 701 is a lightweight, unfaced, flexible insulation in batt form for use on vessels having irregular surfaces, where the compressive strength is not a performance criterion.
• Types 703 and 705 are board insulations usually impaled over welded pins on flat surfaces. They are cut in segments and banded in place on irregular surfaces. Unfaced boards are normally finished with reinforced insulating cement or weatherproof mastic.
• ASJ - or FRK-faced insulation boards shall be applied using mechanical fasteners such as weld pins or speed clips. Fasteners shall be located not less than 3" (76mm) from each edge or corner of the board. Pin spacing along the equipment should be no greater than 12" (305mm) on centers. Additional pins or clips may be required to hold the insulation tightly against the surface where cross breaking is used for stiffening. Weld pin lengths must be selected to ensure a tight bond and a vapor seal.
• All insulation joints should be sealed with pressure-sensitive joint sealing tape to match the insulation facing. Rub hard with a plastic sealing tool to effect a tight bond. Recommended practice suggests 3" (76mm) wide tape on flat surfaces or where edges are shiplapped and stapled. Use 5" (102mm) wide tape in lieu of shiplapping. If insulation is being applied to sheet metal duct work, all sheet metal joints must be sealed prior to insulating. Glass fabric and mastic may be used in lieu of pressure-sensitive tape.