ASTM C591-07
(Specification)Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
SCOPE
1.1 This specification covers the types, physical properties, and dimensions of unfaced, preformed rigid cellular polyisocyanurate plastic material intended for use as thermal insulation on surfaces from 297°F (183°C) to 300°F (150°C). For specific applications, the actual temperature limits shall be agreed upon by the manufacturer and purchaser.
1.2 This specification only covers "polyurethane modified polyisocyanurate" thermal insulation which is commonly referred to as "polyisocyanurate" thermal insulation. This standard does not encompass all polyurethane modified materials. Polyurethane modified polyisocyanurate and other polyurethane materials are similar, but the materials will perform differently under some service conditions.
1.3 This standard is designed as a material specification, not a design document. Physical property requirements vary by application and temperature. At temperatures below - 70°F (- 51°C) the physical properties of the polyisocyanurate insulation at the service temperature are of particular importance. Below - 70°F (- 51°C), the manufacturer and the purchaser must agree on what additional cold temperature performance properties, may be required to determine if the material can function adequately for the particular application.
1.4 Tables in the address requirements of unfaced preformed rigid cellular polyisocyanurate thermal insulation manufactured with HCFC blowing agent.
1.5 The use of thermal insulation material covered by this specification may be regulated by building codes that address fire performance.
1.6 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only and may be approximate.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: C 591 – 07
Standard Specification for
Unfaced Preformed Rigid Cellular Polyisocyanurate
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Thermal Insulation
This standard is issued under the fixed designation C591; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This specification covers the types, physical properties,
and dimensions of unfaced, preformed rigid cellular polyiso-
2. Referenced Documents
cyanurate plastic material intended for use as thermal insula-
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2.1 ASTM Standards:
tiononsurfacesfrom−297°F(−183°C)to300°F(150°C).For
C165 Test Method for Measuring Compressive Properties
specific applications, the actual temperature limits shall be
of Thermal Insulations
agreed upon by the manufacturer and purchaser.
C168 Terminology Relating to Thermal Insulation
1.2 This specification only covers “polyurethane modified
C177 Test Method for Steady-State Heat Flux Measure-
polyisocyanurate” thermal insulation which is commonly re-
ments and Thermal Transmission Properties by Means of
ferred to as “polyisocyanurate” thermal insulation. This stan-
the Guarded-Hot-Plate Apparatus
dard does not encompass all polyurethane modified materials.
C203 Test Methods for Breaking Load and Flexural Prop-
Polyurethane modified polyisocyanurate and other polyure-
erties of Block-Type Thermal Insulation
thane materials are similar, but the materials will perform
C272 Test Method for WaterAbsorption of Core Materials
differently under some service conditions.
for Structural Sandwich Constructions
1.3 Thisstandardisdesignedasamaterialspecification,not
C303 Test Method for Dimensions and Density of Pre-
a design document. Physical property requirements vary by
formed Block and Board−Type Thermal Insulation
application and temperature. At temperatures below -70°F
C335 Test Method for Steady-State Heat Transfer Proper-
(-51°C) the physical properties of the polyisocyanurate insu-
ties of Pipe Insulation
lation at the service temperature are of particular importance.
C390 Practice for Sampling and Acceptance of Thermal
Below -70°F (-51°C), the manufacturer and the purchaser
Insulation Lots
must agree on what additional cold temperature performance
C411 Test Method for Hot-Surface Performance of High-
properties, may be required to determine if the material can
Temperature Thermal Insulation
function adequately for the particular application.
C518 Test Method for Steady-State Thermal Transmission
1.4 TablesintheAnnexA1addressrequirementsofunfaced
Properties by Means of the Heat Flow Meter Apparatus
preformed rigid cellular polyisocyanurate thermal insulation
C550 Test Method for MeasuringTrueness and Squareness
manufactured with HCFC blowing agent.
of Rigid Block and Board Thermal Insulation
1.5 The use of thermal insulation material covered by this
C585 Practice for Inner and Outer Diameters of Rigid
specification may be regulated by building codes that address
Thermal Insulation for Nominal Sizes of Pipe and Tubing
fire performance.
(NPS System)
1.6 The values stated in inch-pound units are to be regarded
C871 Test Methods for Chemical Analysis of Thermal
as the standard. The values given in parentheses are for
Insulation Materials for Leachable Chloride, Fluoride,
information only and may be approximate.
Silicate, and Sodium Ions
1.7 This standard does not purport to address all of the
C 1045 Practice for Calculating Thermal Transmission
safety concerns, if any, associated with its use. It is the
Properties Under Steady-State Conditions
responsibility of the user of this standard to establish appro-
C1058 Practice for Selecting Temperatures for Evaluating
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This specification is under the jurisdiction of ASTM Committee C16 on
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Thermal Insulation and is the direct responsibility of Subcommittee C16.22 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Organic and Nonhomogeneous Inorganic Thermal Insulations. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved June 1, 2007. Published June 2007. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1966. Last previous edition approved in 2005 as C591–05. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C591–07
and Reporting Thermal Properties of Thermal Ins
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