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Refrigeration

polyisocyanurate-pipe-insulationAs operating temperatures of mechanical equipment and piping systems drop, increased diligence must be exercised to optimize the insulation system’s performance and mitigate risks of future deterioration. When specifying and installing an insulation system for pipes or equipment operating at refrigerant temperatures (e.g. -70°F to 32°F) cutting corners or rationalizing compromises is imprudent since the operating costs and risks far outweigh any reduced capital costs; and it is important to note that the best systems are typically not the most expensive systems.

Dyplast's ISO-C1 line of polyisocyanurate insulation has been demonstrated as the optimal pipe and equipment insulant for refrigeration applications, particularly when compared to alternatives such as fiberglass, mineral wool or cellular glass. ISO-C1 is also available in densities drom 2.0 lb/ft3 to 6 lb/ft3

Insulant

R-factors per inch

Comment

Phenolic

6.6

Unclear whether initial or aged k-factor; -292 to +248°F

Polyisocyanurate

5.3-5.7

Varies among manufacturers. Service Temps -297 to +300°F

Expanded Polystyrene

4.3

Softens above 165°F

Extruded Polyethylene

4

-200 to +200°F

Extruded Polystyrene

3.9

Softens above 165°F

Elastomeric

3.6-3.8

up to 220°F; Density Varies from nominal 2 to 6 lb/ft3

Fiberglass

3.8

Generally not used for applications      <-20°F due to combination of low R-value and high WVT and WA

Cellular Glass

3.5

Heavy: Nominally 7 lb/ft3