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Products > Flex-Therm Pipe DescriptionFlexTherm® pipe insulation is an environmentally friendly, CFC-free, flexible elastomeric thermal insulation. It is black in color, and identified as FlexTherm® pipe insulation, and is available in unslit tubular form in wall thicknesses of 3/8", 1/2", 3/4", 1" and 1-1/2" in sizes ranging from 3/8" I.D. to 4" IPS. FlexTherm® pipe insulation is non-porous, non-fibrous and resists mold growth. Applications FlexTherm® pipe insulation is used to retard heat gain and prevent condensation on cold water plumbing. It also retards heat loss for hot water plumbing. FlexTherm® pipe insulation is designed for the plumbing industry. FlexTherm® pipe insulation is recommended for applications ranging from -70°F to 220°F (-57°C to 104°C). The expanded closed cell structure makes FlexTherm® pipe insulation an efficient insulator and provides effective moisture vapor resistance. FlexTherm® pipe insulation has a very tough skin which withstands tearing, rough handling, and severe environmental conditions, and yet is quite flexible for easy installation. FlexTherm® pipe insulation has superior cold weather flexibility. FlexTherm® Pipe can be used with heat tracing/heat tapes. InstallationWith a factory-applied coating of talc on the smooth inner surface, FlexTherm® pipe insulation slides easily over pipe or tubing for quick installation. When applied to existing lines, tubing is slit lengthwise and fitted into place. (Slitting can be done on the job with a sharp knife or pre-slit FlexTherm® Pipe Insulation is available on request.) All seams and butt joints should be sealed with an approved contact adhesive, making sure both surfaces to be joined are coated with adhesive. Fittings are fabricated from miter-cut tubular sections and cover, flanges, etc., from FlexTherm® sheet insulation. Outdoor ApplicationsFlexTherm® pipe insulation is made from a UV resistant elastomeric blend. For moderate UV exposure, no additional protective coating is needed. However, for severe UV exposure (rooftop applications) or where optimum performance is required, 374 protective coating or approved jacketing or cladding should be used. For more detailed information refer to the Installation Guidelines. UndergroundFor buried lines above the water table, use a clean fill such as sand (3"-5" layer) to protect FlexTherm® pipe insulation before backfilling. It is recommended that materials to be buried are properly sealed at all seams and butt joints with an approved contact adhesive. For optimum performance, the lines should be encased in a conduit to protect them from problems associated with ground water. Resistance to Moisture Vapor FlowThe closed-cell structure and unique formulation of FlexTherm® pipe insulation effectively retards the flow of moisture vapor, and is considered a low transmittance vapor retarder. For most indoor applications, FlexTherm® pipe insulation needs no additional protection. Additional vapor barrier protection may be necessary for FlexTherm® Pipe Insulation when installed on low temperature surfaces that are exposed to continuous high humidity.
Flame and Smoke RatingFlexTherm® pipe insulation in wall thicknesses of 1-1/2" (38 mm) and below has a flame spread rating of 25 or less and a smoke development rating of 50 or less as tested by ASTM E 84 Method of Testing entitled: “Surface Burning Characteristics of Building Materials.” FlexTherm pipe insulation is acceptable for use in duct/plenum applications meeting the requirements of NFPA90A/B. Numerical flammability ratings alone may not define the performance of products under actual fire conditions. They are provided only for use in the selection of products to meet limits specified, when compared to a known standard. Specification ComplianceASTM C 534 Type 1 (Tubing), Grade 1 |
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