Division 22 23 Ebook Page 77 FOAMULAR XPS Pipe Insulation Installation Guidelines

Pub No. 10013974-B. Rev. 6/2016 Page 8 of 24 FOAMULAR XPS Pipe Insulation Installation Guidelines 11. On factory applied vapor retarder system, lap joint shall be sealed with SSL tape. (Figure 5, Appendix A) 12. Butt joints shall be covered with vapor retarder tape using the same 3 or 9 o'clock orientation as the longitudinal seam on the vapor barrier. 13. For factory applied facing systems, apply the vapor retarder tape around the butt joint overlap per the manufacturer's installation directions in the appropriate orientation as noted above. (Figure 6, Appendix A) 14. Elbows and fittings shall be wrapped with vapor retarder tape or covered with a mastic type vapor retarder product. Vapor retarder tape shall be wrapped in a spiral configuration. If using mastic type vapor retarder at fittings and elbows, form mastic so that fitting covers can be applied true and tight. 15. Polyurethane foam filled fittings are not acceptable. E. Tank & Vessel Equipment Insulation Note: All insulation and accessory materials shall be the same as those specified on the associated pipe insulation. Follow the same General guidelines for pipe insulation with Tanks & Vessels. 1. Vessel Head a) Head segments shall be performed to fit the contour of the head and eliminate voids. b) Flat head sections shall be installed with the same number of layers and thickness as the vessel walls. c) The vapor retarder on the head sections shall be continuous and of the same material as the vessel walls of the tank. 2. Vessel Walls a) Curved segments shall be fabricated to fit the contour of the surface and in equal width pieces to go around the vessel. (Figure 15, Appendix A) b) Every effort should be made to eliminate through joints. c) Vertical vessels greater than 4 feet in diameter shall have a insulation support ring welded or bolted around the bottom of the tank to prevent insulation movement. d) In double layer systems, stagger both horizontal and vertical joints between the inner and outer layers. (Figure 15, Appendix A) e) Where the head meets the side wall in a in a double layer application the inner layer and outer layer shall be offset by a minimum distance equal to the thickness of the insulation. f) Secure insulation with minimum " steel bands on 12" centers. g) On vertical vessels, install vapor retarder and beginning at the bottom of the vessel working upward to create a shingle effect to naturally shed water. h) Install vapor retarder with a minimum of 2" overlap at all vertical and horizontal joints.

Previous Page
Next Page