['Air Programs']

['Hazardous Air Pollutants']

06/16/2026

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Air Programs - Hazardous Air Pollutants

Appendix C to Subpart NNN of Part 63 - Method for the Determination of Product Density

RegSense CFR Regulations Environmental Protection Agency (EPA)Hazardous Air Pollutants CAA Compliance Environmental Focus Area USA English Air Programs CFR Appendix

1. Purpose

The purpose of this test is to determine the product density of cured blanket insulation. The method is applicable to all cured board and blanket products.

2. Equipment

One square foot (12 in. by 12 in.) template, or templates that are multiples of one square foot, for use in cutting insulation samples.

3. Procedure

3.1 Obtain a sample at least 30 in. long across the machine width. Sample should be free of dirt or foreign matter.

3.2 Lay out the cutting pattern according to the plant's written procedure for the designated product.

3.2 Cut samples using one square foot (or multiples of one square foot) template.

3.3 Weigh product and obtain area weight (lb/ft ²).

3.4 Measure sample thickness.

3.5 Calculate the product density:

Density (lb/ft ³) = area weight (lb/ft ²)/thickness (ft)

['Air Programs']

['Hazardous Air Pollutants']

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