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R-378 — Perlite

Name: Insulation R Values — perlite: record id 378 · rsi per inch 0.0853782 m2K/W/in · r value per inch 0.4848 ft2hF/BTU/in · date 8/31/1944 · k w mk 0.2975 W/mK
Creator: Engineering Database

Material Id: Perlite
Record Id: 378
Date: 8/31/1944
Delta T (F): 20.47
Delta X (in): 1.0005
Density (lb/ft3): 3.52
Description: Expanded, Placed in Wood Frames
Form: Loose
K W Mk (W/mK): 0.2975
Manufacturer: Silbrico Corporation
Material: Perlite
Mean Temp (F): 99.83
R Value per Inch (ft2hF/BTU/in): 0.4848
Rsi per Inch (m2K/W/in): 0.085378
Standard: Nist Srd 81 API
Trade Name: Ryolex®

Source: NIST SRD 81 API

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perlite — record id 378 · rsi per inch 0.0853782 m2K/W/in · r value per inch 0.4848 ft2hF/BTU/in · date 8/31/1944 · k w mk 0.2975 W/mK | Insulation R Values | Engineering Database