ASTM C800-19

Standard Specification for Fibrous Glass Blanket Insulation (Aircraft Type)

ABSTRACT
This specification covers the requirements for fibrous glass blanket thermal and acoustical insulation for use in aircraft applications up to a specified temperature. The fibrous glass blanket insulation are classified into types according to temperature limits, into classes based on acoustical properties, grades according to nominal density and into groups based on thickness. The insulation can either be water repellent or non-water repellent. The materials should conform to the required values of density, handleability, burning characteristics, water repellency and wicking (for water-repellent insulation only), odor emission, service temperature, apparent thermal conductivity, specific transverse airflow resistance, and breaking strength.
SCOPE
1.1 This specification covers the composition, size, dimensions, and physical properties of glass fiber blanket thermal and acoustical insulation for use up to 700°F (370°C) in aircraft applications. For specific applications, the maximum temperature shall be agreed upon between the supplier and the purchaser.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Aug-2019
• ICS: 49.025.60 - Textiles
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.23 - Blanket and Loose Fill Insulation

Relations

• Replaces: ASTM C800-14 - Standard Specification for Fibrous Glass Blanket Insulation (Aircraft Type)
• Effective Date: 01-Sep-2019
• Refers: ASTM C168-24 - Standard Terminology Relating to Thermal Insulation
• Effective Date: 15-Apr-2024
• Refers: ASTM C390-08(2024) - Standard Practice for Sampling and Acceptance of Thermal Insulation Lots
• Effective Date: 01-Mar-2024
• Refers: ASTM C390-08(2019) - Standard Practice for Sampling and Acceptance of Thermal Insulation Lots
• Effective Date: 01-Sep-2019
• Refers: ASTM C1045-19 - Standard Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions
• Effective Date: 01-Apr-2019
• Refers: ASTM C411-19 - Standard Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation
• Effective Date: 01-Mar-2019
• Refers: ASTM C168-18 - Standard Terminology Relating to Thermal Insulation
• Effective Date: 15-Apr-2018
• Refers: ASTM C411-17 - Standard Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation
• Effective Date: 01-Oct-2017
• Refers: ASTM C168-17 - Standard Terminology Relating to Thermal Insulation
• Effective Date: 01-Jun-2017
• Refers: ASTM C168-15a - Standard Terminology Relating to Thermal Insulation
• Effective Date: 15-Oct-2015
• Refers: ASTM C167-15 - Standard Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
• Effective Date: 01-Sep-2015
• Refers: ASTM C518-15 - Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
• Effective Date: 01-Sep-2015
• Refers: ASTM C168-15 - Standard Terminology Relating to Thermal Insulation
• Effective Date: 01-Jun-2015
• Refers: ASTM C390-08(2013) - Standard Practice for Sampling and Acceptance of Thermal Insulation Lots
• Effective Date: 01-Nov-2013
• Refers: ASTM C1304-08(2013) - Standard Test Method for Assessing the Odor Emission of Thermal Insulation Materials
• Effective Date: 01-Sep-2013

Overview

ASTM C800-19, titled Standard Specification for Fibrous Glass Blanket Insulation (Aircraft Type), sets forth requirements for fibrous glass blanket insulation used in aircraft for both thermal and acoustical applications. This standard, developed by ASTM International, covers insulation materials designed for usage up to 700°F (370°C) and provides clear criteria relating to composition, dimensions, physical properties, and classification. The specification aims to ensure consistent performance, safety, and quality for fibrous glass insulation products in challenging aircraft environments.

Key Topics

• Material Composition: Requires glass fibers processed from a molten state and suitable binders; may include additives for water repellency.
• Classification:
  • Types based on maximum temperature usage (e.g., up to 450°F or 700°F).
  • Classes based on acoustical properties.
  • Grades according to nominal density, affecting insulating and handling performance.
  • Groups categorized by material thickness.
• Physical and Mechanical Properties:
  • Density and dimensional tolerances for installation and performance.
  • Thermal Conductivity: Limits set for heat transfer, crucial for maintaining cabin comfort and system efficiency.
  • Burning Characteristics: Must meet Federal Aviation Regulations (FAR) for fire safety, specifically 14 CFR FAR 25.853 and 25.856.
  • Airflow Resistance: Addressed to enhance acoustical performance and reduce noise transmission in aircraft cabins.
  • Breaking Strength: Ensures the blanket withstands handling during installation and operation.
• Water Repellency and Wicking: For water-repellent blankets, the material must meet strict wicking and repellency standards to prevent moisture absorption, ensuring longevity and performance.
• Additional Requirements: Covers odor emission, handleability, workmanship, and dimensional stability.

Applications

• Aircraft Insulation: Primary focus is on thermal and acoustical insulation for aircraft cabins, cockpits, and cargo holds to regulate temperature and reduce noise in both commercial and military aircraft.
• Fire Protection: The stringent burning characteristics make this insulation suitable for areas where fire resistance and safety certification are essential.
• Moisture-Control: Insulations with water-repellent properties are used in locations prone to condensation or where moisture management is critical.
• Custom Insulation Solutions: The specification allows for custom sizes, densities, and types after agreement between manufacturer and purchaser, making it adaptable for unique aerospace insulation needs.

Related Standards

To ensure comprehensive compliance and compatibility, ASTM C800-19 references several related standards, including:

• ASTM C167: Test methods for thickness and density of blanket insulation.
• ASTM C168: Terminology relating to thermal insulation.
• ASTM C177 / C518: Test methods for measuring thermal transmission properties.
• ASTM C390: Practice for sampling and lot acceptance of insulation.
• ASTM C411: Test method for hot-surface performance.
• ASTM C1304: Odor emission testing.
• ASTM C1511 / C1559: Water repellency and wicking test methods for fibrous glass insulation.
• ASTM D5034: Breaking strength of textile fabrics.
• 14 CFR FAR 25.853 & 25.856: Federal Aviation Regulations for fire safety in aircraft.

Employing fibrous glass blanket insulation in accordance with ASTM C800-19 ensures reliable performance, enhanced fire and acoustic safety, and regulatory compliance for aerospace applications. This standard is vital for manufacturers, suppliers, and aircraft builders seeking consistent and high-quality insulation solutions.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C800 −19
Standard Specification for
Fibrous Glass Blanket Insulation (Aircraft Type)
This standard is issued under the fixed designation C800; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope C411Test Method for Hot-Surface Performance of High-
Temperature Thermal Insulation
1.1 This specification covers the composition, size,
C518Test Method for Steady-State Thermal Transmission
dimensions, and physical properties of glass fiber blanket
Properties by Means of the Heat Flow Meter Apparatus
thermal and acoustical insulation for use up to 700°F (370°C)
C522Test Method for Airflow Resistance of Acoustical
inaircraftapplications.Forspecificapplications,themaximum
Materials
temperature shall be agreed upon between the supplier and the
C1045Practice for Calculating Thermal Transmission Prop-
purchaser.
erties Under Steady-State Conditions
1.2 Thevaluesstatedininch-poundunitsaretoberegarded
C1058Practice for Selecting Temperatures for Evaluating
as standard. The values given in parentheses are mathematical
and Reporting Thermal Properties of Thermal Insulation
conversions to SI units that are provided for information only
C1304Test Method for Assessing the Odor Emission of
and are not considered standard.
Thermal Insulation Materials
1.3 This standard does not purport to address all of the
C1511Test Method for Determining the Water Retention
safety concerns, if any, associated with its use. It is the (Repellency) Characteristics of Fibrous Glass Insulation
responsibility of the user of this standard to establish appro-
(Aircraft Type)
priate safety, health, and environmental practices and deter- C1559Test Method for Determining Wicking of Fibrous
mine the applicability of regulatory limitations prior to use.
Glass Blanket Insulation (Aircraft Type)
1.4 This international standard was developed in accor- D5034TestMethodforBreakingStrengthandElongationof
dance with internationally recognized principles on standard-
Textile Fabrics (Grab Test)
ization established in the Decision on Principles for the E691Practice for Conducting an Interlaboratory Study to
Development of International Standards, Guides and Recom-
Determine the Precision of a Test Method
mendations issued by the World Trade Organization Technical
F1110Test Method for Sandwich Corrosion Test
Barriers to Trade (TBT) Committee. 2.2 Other Standards
14CFRFAR(FederalAviationRegulations)25.853 Appen-
2. Referenced Documents
dix F, Part I
2.1 ASTM Standards:
14 CFR FAR (Federal Aviation Regulations) 25.856(a)
C167Test Methods forThickness and Density of Blanket or
Appendix F, Part IV
Batt Thermal Insulations
3. Terminology
C168Terminology Relating to Thermal Insulation
C177Test Method for Steady-State Heat Flux Measure-
3.1 Definitions—Terminology C168 shall be considered as
ments and Thermal Transmission Properties by Means of
applying to the terms used in this specification. Definitions in
the Guarded-Hot-Plate Apparatus
Test Method C522 shall be considered as applying to the
C390Practice for Sampling and Acceptance of Thermal
acoustical terms used in this standard.
Insulation Lots
3.2 Definitions of Terms Specific to This Standard:
3.2.1 Wetting—A condition where the water has penetrated
This specification is under the jurisdiction of ASTM Committee C16 on
into the insulation and fills the spaces between the fibers.
Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on
Blanket and Loose Fill Insulation.
4. Classification
Current edition approved Sept. 1, 2019. Published September 2019. Originally
4.1 Fibrous glass blanket insulation covered by this speci-
approved in 1975. Last previous edition approved in 2014 as C800–14. DOI:
10.1520/C0800-19.
fication shall be classified into Types based on temperature
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from, National Archives and Records Administration 8601 Adelphi
the ASTM website. Road College Park, MD 20740-6001.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C800 − 19
limits,Classesbasedonacousticalproperties,Gradesbasedon 7. Physical Requirements
nominal density and Groups based upon thickness as shown in
7.1 The insulation shall conform to the requirements de-
Table 1.
scribed in 7.2 – 7.11 and Tables 1-5.
4.2 The insulation shall be either water repellent or non-
7.2 Density—The insulation shall conform to the require-
water repellent.
ments shown in Table 1.The insulation shall have a maximum
density tolerance when tested in accordance with 11.6 of +
5. Ordering Information
15%, with no minimum limit.
5.1 Thetype,class,grade,andgroupsuitedtotheconditions
7.3 Handleability—Each piece of insulation shall be suffi-
of intended service shall be specified by the purchaser after
ciently coherent to permit transportation and installation as a
consultation with the supplier. Type refers to service
unit.
temperature,classreferstothermal/acousticalproperties,grade
7.4 Burning Characteristics—The insulation shall conform
refers to nominal density and group refers to thickness of
to the requirements in FAR 25.853,Appendix F, Part I and the
insulation.
encapsulated insulation blanket shall conform to the require-
5.2 It shall also be specified whether the insulation is to be
ments in FAR 25.856(a) in accordance with 11.1. If required,
water repellent or non-water repellent.
unfacedblanketsaretestedwithalternativemethodsorrequire-
ments recognized by airframe manufacturers to demonstrate
6. Materials and Manufacture
and maintain product consistency.
6.1 Composition:
7.5 Wicking (water-repellent insulation only)—The insula-
6.1.1 Fibershallbeglassprocessedfromamoltenstateinto
tion shall conform to the requirements in Table 2, when test in
fibrous form.
accordance with 11.2.
6.1.2 Binder shall be of a type and quantity to provide the
7.6 Odor Emission—A detectable odor of objectionable
properties and performance listed in this specification. Addi-
nature recorded by more than two of the five panel members
tives can be included to provide a degree of water repellency.
shall constitute failure of the material, when tested in accor-
6.1.3 This product is typically supplied unfaced.
dance with 11.3.
6.1.4 The basic product can also be obtained in uncured
form for molding into special shapes other than blanket.
7.7 Service Temperature—The insulation shall conform to
However, not all requirements in this specification apply. The
the requirements in Table 1, when tested in accordance with
purchaser shall consult the supplier and agree on the portions
11.7.
of this specification and conditions that are applicable.
7.7.1 Insulation shall be serviceable up to the maximum
6.2 For sizes and densities other than those listed, the temperature limitations as long as limited mechanical proper-
purchaser shall consult the material supplier. ties are required. At maximum or near-maximum service
TABLE 1 Types, Classes, Grades and Groups
Type 1– For Use to 450°F (232°C) ClassAA
Nominal Density Maximum Density Color Nominal Thickness
(unless otherwise
specified)
3 3 3 3
Grade lb/ft kg/m lb/ft (kg/m ) Group in. (mm)
A 0.34 (5.5) 0.39 (6.33) Medium gray 1 0.38 (9.5)
B 0.42 (6.7) 0.48 (7.71) Amber 2 0.50 (13)
C 0.50 (8.0) 0.58 (9.2) Medium gray 3 1.00 (25)
D 0.60 (9.6) 0.69 (11.0) Green 4 1.50 (38)
E 1.20 (19) 1.38 (21.9) Medium gray 5 2.00 (51)
F 1.50 (24) 1.73 (27.6) Amber
G 1.00 (16) 1.15 (18.4) Orange
Class B
Nominal Density Maximum Density Nominal Thickness
3 3 3 3
Grade lb/ft kg/m lb/ft (kg ⁄m ) Group in. (mm)
A 0.50 (8.0) 0.58 (9.2) Amber 1 0.38 (9.5)
B 0.60 (9.6) 0.69 (11.0) Amber 2 0.50 (13)
C 1.00 (16) 1.15 (18.4) Amber 3 1.00 (25)
4 2.00 (50)
Type II-For Use to 700°F (370°C)
Class AA
Nominal Density Maximum density Color Nominal Thickness
3 3 3 3
Grade lb/ft kg/m lb/ft (kg/m ) Group in. (mm)
A 0.60 (9.6) 0.69 (11.0) White to light tan 1 0.38 (9.5)
B 1.00 (16) 1.15 (18.4) White to light tan 2 0.50 (13)
C 3.00 (48) 3.45 (55.2) White to light tan 3 1.00 (25)
C800 − 19
TABLE 2 Other Properties
AppendixFPartIandtheencapsulatedinsulationblanketshall
Property Requirement, max conform to the requirements in FAR 25.856(a) flame propaga-
Wicking:
tion test in Appendix F, Part IV.
Before Aging and Before Leaching, in. ⁄4 (6.4)
(mm)
11.2 Wicking—Determine wicking in accordance with Test
After Aging, in. (mm) ⁄4 (6.4)
Method C1559.
After Leaching, in. (mm) ⁄4 (6.4)
A
Water Repellency, lb. (kg): 0.044 (0.020)
11.3 Odor Emission—Determine odor emission in accor-
A
Average of three test specimens.
dance with Test Method C1304.
11.4 Specific Transverse Airflow Resistance—Determinethe
specific transverse airflow resistance, r (of a nonisotropic
t
temperatur
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C800 − 14 C800 − 19
Standard Specification for
Fibrous Glass Blanket Insulation (Aircraft Type)
This standard is issued under the fixed designation C800; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification covers the composition, size, dimensions, and physical properties of glass fiber blanket thermal and
acoustical insulation for use up to 700°F (370°C) in aircraft applications. For specific applications, the maximum temperature shall
be agreed upon between the supplier and the purchaser.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
C167 Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
C168 Terminology Relating to Thermal Insulation
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the
Guarded-Hot-Plate Apparatus
C390 Practice for Sampling and Acceptance of Thermal Insulation Lots
C411 Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation
C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
C552C522 Specification for Cellular Glass Thermal InsulationTest Method for Airflow Resistance of Acoustical Materials
C1045 Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions
C1058 Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation
C1304 Test Method for Assessing the Odor Emission of Thermal Insulation Materials
C1511 Test Method for Determining the Water Retention (Repellency) Characteristics of Fibrous Glass Insulation (Aircraft
Type)
C1559 Test Method for Determining Wicking of Fibrous Glass Blanket Insulation (Aircraft Type)
D5034 Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test)
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
F1110 Test Method for Sandwich Corrosion Test
2.2 Other Standards
14 CFR FAR (Federal Aviation Regulations) 25.853 Appendix F, Part I
14 CFR FAR (Federal Aviation Regulations) 25.856(a) Appendix F, Part IV
This specification is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on Blanket and Loose
Fill Insulation.
Current edition approved Feb. 1, 2014Sept. 1, 2019. Published July 2014September 2019. Originally approved in 1975. Last previous edition approved in 20082014 as
C800 – 08.C800 – 14. DOI: 10.1520/C0800-14.10.1520/C0800-19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from, National Archives and Records Administration 8601 Adelphi Road College Park, MD 20740-6001.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C800 − 19
3. Terminology
3.1 Definitions—Terminology C168 shall be considered as applying to the terms used in this specification. Definitions in Test
Method C552C522 shall be considered as applying to the acoustical terms used in this standard.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 Wetting—A condition where the water has penetrated into the insulation and fills the spaces between the fibers.
4. Classification
4.1 Fibrous glass blanket insulation covered by this specification shall be classified into Types based on temperature limits,
Classes based on acoustical properties, Grades based on nominal density and Groups based upon thickness as shown in Table 1.
4.2 The insulation shall be either water repellent or non-water repellent.
5. Ordering Information
5.1 The type, class, grade, and group suited to the conditions of intended service shall be specified by the purchaser after
consultation with the supplier. Type refers to service temperature, class refers to thermal/acoustical properties, grade refers to
nominal density and group refers to thickness of insulation.
5.2 It shall also be specified whether the insulation is to be water repellent or non-water repellent.
6. Materials and Manufacture
6.1 Composition:
6.1.1 Fiber shall be glass processed from a molten state into fibrous form.
6.1.2 Binder shall be of a type and quantity to provide the properties and performance listed in this specification. Additives can
be included to provide a degree of water repellency.
6.1.3 This product is typically supplied unfaced.
6.1.4 The basic product can also be obtained in uncured form for molding into special shapes other than blanket. However, not
all requirements in this specification apply. The purchaser shall consult the supplier and agree on the portions of this specification
and conditions that are applicable.
6.2 For sizes and densities other than those listed, the purchaser shall consult the material supplier.
7. Physical Requirements
7.1 The insulation shall conform to the requirements described in 7.2 – 7.11 and Tables 1-5.
7.2 Density—The insulation shall conform to the requirements shown in Table 1. The insulation shall have a maximum density
tolerance when tested in accordance with 11.6 of + 15%, with no minimum limit.
TABLE 1 Types, Classes, Grades and Groups
Type 1– For Use to 450°F (232°C) ClassAA
Nominal Density Maximum Density Color Nominal Thickness
(unless otherwise
specified)
3 3 3 3
Grade lb/ft kg/m lb/ft (kg/m ) Group in. (mm)
A 0.34 (5.5) 0.39 (6.33) Medium gray 1 0.38 (9.5)
B 0.42 (6.7) 0.48 (7.71) Amber 2 0.50 (13)
C 0.50 (8.0) 0.58 (9.2) Medium gray 3 1.00 (25)
D 0.60 (9.6) 0.69 (11.0) Green 4 1.50 (38)
E 1.20 (19) 1.38 (21.9) Medium gray 5 2.00 (51)
F 1.50 (24) 1.73 (27.6) Amber
G 1.00 (16) 1.15 (18.4) Orange
Class B
Nominal Density Maximum Density Nominal Thickness
3 3 3 3
Grade lb/ft kg/m lb/ft (kg ⁄m ) Group in. (mm)
A 0.50 (8.0) 0.58 (9.2) Amber 1 0.38 (9.5)
B 0.60 (9.6) 0.69 (11.0) Amber 2 0.50 (13)
C 1.00 (16) 1.15 (18.4) Amber 3 1.00 (25)
4 2.00 (50)
Type II-For Use to 700°F (370°C)
Class AA
Nominal Density Maximum density Color Nominal Thickness
3 3 3 3
Grade lb/ft kg/m lb/ft (kg/m ) Group in. (mm)
A 0.60 (9.6) 0.69 (11.0) White to light tan 1 0.38 (9.5)
B 1.00 (16) 1.15 (18.4) White to light tan 2 0.50 (13)
C 3.00 (48) 3.45 (55.2) White to light tan 3 1.00 (25)
C800 − 19
TABLE 2 Other Properties
Property Requirement, max
Wicking:
Before Aging and Before Leaching, in. ⁄4 (6.4)
(mm)
After Aging, in. (mm) ⁄4 (6.4)
After Leaching, in. (mm) ⁄4 (6.4)
A
Water Repellency, lb. (kg): 0.044 (0.020)
A
Average of three test specimens.
7.3 Handleability—Each piece of insulation shall be sufficiently coherent to permit transportation and installation as a unit.
7.4 Burning Characteristics—The insulation shall conform to the requirements in FAR 25.853, Appendix F, Part I and the
encapsulated insulation blanket shall conform to the requirements in FAR 25.856(a) in accordance with 11.1. If required, unfaced
blankets are tested with alternative methods or requirements recognized by airframe manufacturers to demonstrate and maintain
product consistency.
7.5 Wicking (water-repellent insulation only)—The insulation shall conform to the requirements in Table 2, when test in
accordance with 11.2.
7.6 Odor Emission—A detectable odor of objectionable nature recorded by more than two of the five panel members shall
constitute failure of the material, when tested in accordance with 11.3.
7.7 Service Temperature—The insulation shall conform to the requirements in Table 1, when tested in accordance with 11.7.
7.7.1 Insulation shall be serviceable up to the maximum temperature limitations as long as limited mechanical properties are
required. At maximum or near-maximum service temperatures, some deterioration of the binder is possible over extended periods
of time.
7.8 Apparent Thermal Conductivity—Values shall not exceed those in Table 3, when tested in accordance with 11.9.
7.9 Specific Transverse Airflow Resistance—The insulation shall conform to the requirements in Table 4, when tested in
accordance with 11.4.
7.10 Breaking Strength—T
...