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R-870 — Perlite

Name: Insulation R Values — perlite: record id 870 · rsi per inch 0.0659398 m2K/W/in · r value per inch 0.374423 ft2hF/BTU/in · date 12/8/1952 · k w mk 0.3852 W/mK
Creator: Engineering Database

Material Id: Perlite
Record Id: 870
Date: 12/8/1952
Delta T (F): 22.38
Delta X (in): 1.01
Density (lb/ft3): 5.439
Description: Specimens Placed in Wood Frames
Form: Loose
K W Mk (W/mK): 0.3852
Manufacturer: Atlantic Perlite Co.
Material: Perlite
Mean Temp (F): 125.49
R Value per Inch (ft2hF/BTU/in): 0.374423
Rsi per Inch (m2K/W/in): 0.06594
Standard: Nist Srd 81 API
Test Method: ASTM C 177
Trade Name: Panacalite

Source: NIST SRD 81 API

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perlite — record id 870 · rsi per inch 0.0659398 m2K/W/in · r value per inch 0.374423 ft2hF/BTU/in · date 12/8/1952 · k w mk 0.3852 W/mK | Insulation R Values | Engineering Database