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R-638 — Perlite

Name: Insulation R Values — perlite: record id 638 · rsi per inch 0.0555799 m2K/W/in · r value per inch 0.315597 ft2hF/BTU/in · date 11/19/1948 · k w mk 0.457 W/mK
Creator: Engineering Database

Material Id: Perlite
Record Id: 638
Date: 11/19/1948
Delta T (F): 23.99
Delta X (in): 0.9781
Density (lb/ft3): 14.56
Description: Specimens Placed in Wood Frames (TUC-96D)
Form: Loose
K W Mk (W/mK): 0.457
Material: Perlite
Mean Temp (F): 39.68
R Value per Inch (ft2hF/BTU/in): 0.315597
Rsi per Inch (m2K/W/in): 0.05558
Standard: Nist Srd 81 API
Test Method: ASTM C 177

Source: NIST SRD 81 API

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perlite — record id 638 · rsi per inch 0.0555799 m2K/W/in · r value per inch 0.315597 ft2hF/BTU/in · date 11/19/1948 · k w mk 0.457 W/mK | Insulation R Values | Engineering Database