ASTM C1086-96(2004)

Standard Specification for Glass Fiber Felt Thermal Insulation

SCOPE
1.1 This specification covers glass fiber unsupported needled felt binder-free insulation for thermal insulation. This material is used as the thermal insulation component in the fabrication of insulation systems for use on machinery and equipment, such as steam turbines, boilers, boiler feed pumps, and piping at temperatures up to 1200°F (650°C).  
1.2 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.  
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only.
Note 1-This standard is a consensus standard to provide a substitute for military specification MIL-I-16411E.

General Information

• Status: Historical
• Publication Date: 31-Mar-2004
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.23 - Blanket and Loose Fill Insulation

Relations

• Replaces: ASTM C1086-96 - Standard Specification for Glass Fiber Felt Thermal Insulation
• Effective Date: 01-Apr-2004
• Replaced By: ASTM C1086-08 - Standard Specification for Glass Fiber Mechanically Bonded Felt Thermal Insulation
• Effective Date: 01-Aug-2008
• Referred By: ASTM F683-23 - Standard Practice for Selection and Application of Thermal Insulation for Piping and Machinery
• Effective Date: 01-Apr-2004
• Referred By: ASTM C1558-19 - Standard Guide for Development of Standard Data Records for Computerization of Thermal Transmission Test Data for Thermal Insulation
• Effective Date: 01-Apr-2004
• Referred By: ASTM C1695-22 - Standard Specification for Fabrication of Flexible Removable and Reusable Blanket Insulation for Hot Service
• Effective Date: 01-Apr-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C 1086 – 96 (Reapproved 2004)
Standard Specification for
Glass Fiber Felt Thermal Insulation
This standard is issued under the fixed designation C1086; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope and Reporting Thermal Properties of Thermal Insulation
D578 Specification for Glass Fiber Strands
1.1 This specification covers glass fiber unsupported
2.2 U.S. Federal Standard:
needled felt binder-free insulation for thermal insulation. This
FED-STD-191 Textile Test Methods
material is used as the thermal insulation component in the
2.3 U.S. Military Standards:
fabrication of insulation systems for use on machinery and
MIL-I-16411E Insulation Felt, Thermal, Glass Fiber
equipment, such as steam turbines, boilers, boiler feed pumps,
MIL-STD-1623 Fire Performance Requirements and Ap-
and piping at temperatures up to 1200°F (650°C).
proved Specifications for Interior Finish Materials and
1.2 This standard does not purport to address all of the
Furnishings (Naval Shipboard Use)
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3. Terminology
priate safety and health practices and determine the applica-
3.1 Definitions:
bility of regulatory limitations prior to use.
3.1.1 Terminology C168 shall be considered as applying to
1.3 The values stated in inch-pound units are to be regarded
the terms used in this specification.
as the standard. The values given in parentheses are provided
3.1.2 Definitions in Specification D578 shall be considered
for information only.
as applying to the terms used in defining glass fiber composi-
NOTE 1—This standard is a consensus standard to provide a substitute
tion code, process, and fiber diameter.
for military specification MIL-I-16411E.
4. Classification
2. Referenced Documents
4.1 Thermal insulation shall be glass fiber, unsupported
2.1 ASTM Standards:
needled felt insulation, for use on surfaces with temperatures
C167 Test Methods for Thickness and Density of Blanket
up to 1200°F (650°C).
or Batt Thermal Insulations
C168 Terminology Relating to Thermal Insulation
5. Ordering Information
C177 Test Method for Steady-State Heat Flux Measure-
5.1 The purchase order or contract shall specify the follow-
ments and Thermal Transmission Properties by Means of
ing:
the Guarded-Hot-Plate Apparatus
5.1.1 Quantity of each thickness (10.1).
C390 Practice for Sampling and Acceptance of Thermal
5.1.2 Any special requirements for nonstandard sizes or
Insulation Lots
dimensions (10.2 and 10.3).
C411 Test Method for Hot-Surface Performance of High-
5.1.3 Any requirements for certification (19.1).
Temperature Thermal Insulation
5.1.4 Any special requirements for supplementary testing
C518 Test Method for Steady-State Thermal Transmission
requirements (9.1).
Properties by Means of the Heat Flow Meter Apparatus
C 1045 Practice for Calculating Thermal Transmission
6. Materials and Manufacture
Properties Under Steady-State Conditions
6.1 The material shall consist of 100% glass fiber yarns
C1058 Practice for Selecting Temperatures for Evaluating
needled into insulation felts without the use of binders. No
organic fibers and no glass or mineral shot shall be included in
the product.The insulation felt may be composed of laminates
This specification is under the jurisdiction of ASTM Committee C16 on
formed without the use of binders. The glass fibers shall meet
Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on
the designation C, Continuous Filament Yarns, in accordance
Blanket and Loose Fill Insulation.
with Specification D578 (see Note 2).
Current edition approved April 1, 2004. Published May 2004. Originally
approved in 1987. Last previous edition approved in 1996 as C1086–96.
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 Standardization Documents, Order Desk, Bldg. 4, Section D,
the ASTM website. 700 Robbins Ave., Philadelphia, PA 19111-5094, ATTN: NPODS.
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C 1086 – 96 (2004)
TABLE 2 Physical Requirements
6.2 The fiber diameter of the glass fiber yarns used in the
final product, when determined in accordance with the Fila- Thickness, length of roll See Table 3
Mass per unit area See Table 4
mentDiametersectionofSpecificationD578shallconformto
A
Apparent Thermal Conductivity, Max
therequirementsofTable1.Thecertificationofthefinenessof 2
Btu in./h ft F (W/mK) at mean temp. of:
fiber may be either by the felt manufacturer or by certification 75°F (24°C) 0.29 (0.042)
300°F (149°C) 0.40 (0.058)
of the glass yarn supplier and documentation by the manufac-
500°F (260°C) 0.50 (0.072)
turer as to sources of supply.
700°F (371°C) 0.65 (0.094)
Hot Surface Performance no melting, no significant
6.3 All materials used shall be asbestos-free.
at 1200°F (650°C) shrinkage (max 5 %)
NOTE 2—The fibers from glass composition designated as “E” glass Tensile strength: psi (kPa)
Minimum 5 (34.5)
(electrical glass) in the range from D through G meet the requirements of
Non-Combustible Pass
Tables 1 and 2.
A
The thermal transmission properties of felted glass fiber thermal insulation
7. Physical Properties may vary with temperature, temperature gradient, thickness and shape. Note that
the apparent thermal conductivity requirements specified in the table are based on
7.1 When tested in accordance with Section 16, the insula-
samples tested under conditions specified in 16.1.3. These are comparative
values for establishing specification compliance. They may not represent the
tion shall conform to the physical requirements listed in Table
installed performance of the insulation under use conditions of the insulation
2.
differing substantially from the test conditions.
8. Performance Characteristics
TABLE 3 Standard Dimensions
8.1 Needled felt glass fiber insulation may be damaged if
Nominal Insulation
any of the following conditions are encountered:
Thickness, Length,
in. (mm) ft (m)
8.1.1 Direct exposure to hydrofluoric acid.
8.1.2 Prolonged direct exposure to strong caustics. 0.3 (7.6) 150 (45.2)
0.5 (12.7) 75 (22.9)
8.1.3 Prolonged exposure to boiling water.
1.0 (25.4) 45 (13.7)
8.2 Conditions outlined in 8.1 are mentioned only to make
0.75 (19.1) 55 (16.8)
the user aware of such applications that require special
consideration. Contact the insulation manufacturer for recom-
mendations when the above conditions are anticipated. TABLE 4 Standard Parameters
Nominal
Mass per Area
9. Other Requirements Thickness,
2 2
oz/ft (kg/m )
in. (mm)
9.1 Supplementary requirements include qualification tests
0.3 (7.6) 3.5 (1.07)
andacceptanceteststospecialstandards.Thesesupplementary
0.50 (12.7) 6.0 (1.83)
requirements may be made by agreement to the supplier and
1.0 (25.4) 15.0 (4.58)
0.75 (19.1) 12.25 (3.74)
the purchaser only when specified in the purchase order or
contract.
10. Standard Sizes and Dimensions
11.3 Insulation Length/Tolerance—The tolerance on the
10.1 Thickness—The insulation shall be furnished in the
lengths, listed in Table 3, shall be−6 in. (−152 mm), with
thicknesses shown in Table 3. excess permitted.Aroll may either contain a maximum of one
10.2 Insulation Length—Unless otherwise specified, the
full thickness splice or consist of a maximum of two pieces.
insulation shall be furnished in rolls of the lengths given in 11.4 Width—The width shall be within−0.5 in. (13 mm),
Table 3.
to+1.0 in. (25 mm) of the specified width.
10.3 Insulation Width—Unless otherwise specified (5.1.2),
12. W
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