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R-423 — Cellular Polystyrene Extruded

Name: Insulation R Values — cellular_polystyrene_extruded: record id 423 · date 4/26/1945 · delta x 0.9774 in · mean temp 88.84 F · delta t 18.75 F
Creator: Engineering Database

Material Id: Cellular Polystyrene Extruded
Record Id: 423
Date: 4/26/1945
Delta T (F): 18.75
Delta X (in): 0.9774
Density (lb/ft3): 2
Description: Dark grey, Pore diameter: 1.8 MM to 2.2 MM
Form: Board
K W Mk (W/mK): 0.3409
Manufacturer: Dow Chemical Co.
Material: Cellular Polystyrene, Extruded
Mean Temp (F): 88.84
R Value per Inch (ft2hF/BTU/in): 0.42308
Rsi per Inch (m2K/W/in): 0.074509
Standard: Nist Srd 81 API
Test Method: ASTM C 177
Trade Name: Dow Q 103.8

Source: NIST SRD 81 API

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