DUAL-GARD DI
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PERMA-PIPE / RICWIL Preinsulated Piping Systems DUAL-GARD D.I. ™ For Underground Chilled Water and Low Temperature Hot Water Installations . Ductile Iron Service Pipe Provides High Corrosion Resistance for Underground Applications . Closed-Cell Polyurethane Foam Insulation Offers Low Heat Loss and High Resistance to Water Absorption . Outer PVC or PE Jacket Protects Insulation and Service Pipe PERMA-PIPE® / RICWIL® DUAL-GARD D.I.TM is a factory fabricated, insulated piping system designed for underground chilled, hot or dual temperature water distribution. The system consists of ductile iron service piping with integral, gasketed bell joint, polyurethane foam insulation and a PVC or PE outer jacket. DUAL-GARD D.I.TM Features Service Pipe Ductile Iron (D.I.) service pipe is supplied in Class 51 (3” and 4”) and Class 50 (6” - 24”) with a working pressure of 250 psi,plus a 100 psi surge allow-ance. The service pipe is cement lined with or without asphaltic sealcoating depending on application/ specification to A N S I / AW WA C104/A21.4 standards. The exterior is asphaltic coated. SBR rubber gaskets are designed for constant operation up to 150°F. EPDM gaskets are available for operating temperatures to 225°F. Pipe is furnished in 18 foot to 20 foot nominal lengths. Insulation Rigid closed-cell polyurethane foam insulation completely fills the annular space between the service pipe and the outer jacket, providing low thermal conductivity and high resistance to water absorption. Insulation nominal density is 2 lb/ft3. The coefficient of thermal conductivity (K) is 0.18 BTUin/hr/ft2/°F at 73°F. Closed-cell content is 90 to 95%. Jacket Polyvinyl Chloride (PVC) or polyethylene (PE) plastic outer jacket provides tough, rigid yet flexible protection for both the insulation and the service pipe. Jackets can withstand H-20 loading with two feet of cover and ends have a factory-applied moisture barrier. Fittings Fittings are push joint, mechanical joint or restrained joint and manufactured from ductile iron. Fittings are rated to a minimum of 250 psi (3” - 12”) and 150 psi (14” - 24”) and meet applicable requirements of ANSI/AWWA C110/A21.10. Push joint and mechanical joint components are in accordance with ANSI/AWWA C110/A21.11. All fittings are cement lined depending on a p p l i c a t i o n s / s p e c i f i c a t i o n s . Exteriors are coated with asphalt. Thrust blocks are required at all changes of direction for push joint and mechanical joint systems.

DUAL-GARD D.I.™ Spec & Data Factory Applied Moisture Barrier- -Polyurethane Foam Insulation ^Ductile Iron Service Pipe Undisturbed Trench Wall Ductile Iron Service Pipe Concrete Thrust Block Field Installed Prior To Hydrostatic Testing DUAL -GARD D.I.™ Product Data * Gain/Loss expressed in Btu/hr per foot of length All underground chilled water or hot water pipe shall be the PERMA-PIPE / RICWIL® DUAL- GARD D.I.™ System composed of integral sealed 18 or 20 foot (nominal) units of cement lined and asphaltic seal coated* ductile iron pipe, insulated with polyurethane foam and cov- ered with a...