ASTM C892

Thermal Conductivity of Fibrous Insulating Material

The heat flow through a material is determined with a water-cooled copper calorimeter. The temperature limit must be specified, as well as the hot face or mean test temperatures desired. The maximum hot face temperature for testing is 2700°F. The sttandard sample of fibrous insulation requires that new material be available to make a 18" x 13.5" x 2" pad.  As blankets are available in several thicknesses, it is often necesary to cut several pieces of blanket that can be placed one upon the other to make the 2" thickness.

First hot face temperature specified:  $1440
Each additional test temperature:  $360

First mean temperature specified: $1700
Each additional test temperature:  $360

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SIGNIFICANCE AND USE

This test method covers the determination of the comparative thermal conductivity of materials under standardized conditions of testing.  This test method establishes placement of thermocouples and the positioning of test samples in the calorimeter. This test method must be used with Test Method C201.

1. SCOPE

1.1 This test method supplements Test Method C892, and shall be used in conjunction with that test method to determine the thermal conductivity of fibrous insulating material.

COPYRIGHT NOTICE

Extracted, with permission, from ASTM C892 Standard Specification for High-Temperature Fiber Blanket Thermal Insulation, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the standard may be purchased from ASTM International, phone 610-832-9555, e-mail: service@astm.org, website:www.astm.org.

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