ASTM C591-01

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 The use of thermal insulation material covered by this specification may be regulated by building codes that address fire performance.
1.5 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.
1.6 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.

General Information

• Status: Historical
• Publication Date: 09-Nov-2001
• ICS: 83.100 - Cellular materials
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.22 - Organic and Nonhomogeneous Inorganic Thermal Insulations

Relations

• Replaces: ASTM C591-00 - Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
• Effective Date: 10-Nov-2001
• Replaced By: ASTM C591-05 - Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation
• Effective Date: 01-Dec-2005
• Referred By: ASTM D7793-21 - Standard Specification for Insulated Vinyl Siding
• Effective Date: 10-Nov-2001
• Referred By: ASTM D1079-20 - Standard Terminology Relating to Roofing and Waterproofing
• Effective Date: 10-Nov-2001
• Referred By: ASTM C1303/C1303M-22 - Standard Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam Insulation
• Effective Date: 10-Nov-2001
• Referred By: ASTM C1696-20 - Standard Guide for Industrial Thermal Insulation Systems
• Effective Date: 10-Nov-2001
• Referred By: ASTM C1774-13(2019) - Standard Guide for Thermal Performance Testing of Cryogenic Insulation Systems
• Effective Date: 10-Nov-2001

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 591 – 01
Standard Specification for
Unfaced Preformed Rigid Cellular Polyisocyanurate
1
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 2. Referenced Documents
1.1 This specification covers the types, physical properties, 2.1 ASTM Standards:
and dimensions of unfaced, preformed rigid cellular polyiso- C165 Test Method for Measuring Compressive Properties
2
cyanurate plastic material intended for use as thermal insula- of Thermal Insulations
tiononsurfacesfrom−297°F(−183°C)to300°F(150°C).For C168 Terminology Relating to Thermal Insulating Materi-
2
specific applications, the actual temperature limits shall be als
agreed upon by the manufacturer and purchaser. C177 Test Method for Steady-State Heat Flux Measure-
1.2 This specification only covers “polyurethane modified ments and Thermal Transmission Properties by Means of
2
polyisocyanurate” thermal insulation which is commonly re- the Guarded Hot Plate Apparatus
ferred to as “polyisocyanurate” thermal insulation. This stan- C203 Test Method for Breaking Load and Flexural Prop-
2
dard does not encompass all polyurethane modified materials. erties of Block-Type Thermal Insulation
Polyurethane modified polyisocyanurate and other polyure- C236 Test Method for Steady-State Thermal Performance
2
thane materials are similar, but the materials will perform of BuildingAssemblies by Means of a Guarded Hot Box
differently under some service conditions. C272 Test Method for WaterAbsorption of Core Materials
2
1.3 Thisstandardisdesignedasamaterialspecification,not for Structural Sandwich Constructions
a design document. Physical property requirements vary by C303 Test Method for Density of Preformed Block-Type
2
application and temperature. At temperatures below -70°F Thermal Insulation
(-51°C) the physical properties of the polyisocyanurate insu- C335 Test Method for Steady-State Heat Transfer Proper-
2
lation at the service temperature are of particular importance. ties of Horizontal Pipe
Below -70°F (-51°C), the manufacturer and the purchaser C390 Criteria for Sampling and Acceptance of Preformed
2
must agree on what additional cold temperature performance Thermal Insulation Lots
properties, may be required to determine if the material can C411 Test Method for Hot Surface Performance of High
2
function adequately for the particular application. Temperature Thermal Insulation
1.4 The use of thermal insulation material covered by this C518 TestMethodfortheSteadyStateHeatFluxMeasure-
specification may be regulated by building codes that address ments and Thermal Transmission Properties by Means of
2
fire performance. the Heat Flow Meter Apparatus
1.5 The values stated in inch-pound units are to be regarded C550 Practice for Measuring Trueness and Squareness of
2
as the standard. The values given in parentheses are for Rigid Block and Board Thermal Insulation
information only and may be approximate. C585 Practice for Inner and Outer Diameters of Rigid
1.6 This standard does not purport to address all of the Thermal Insulation for Nominal Sizes of Pipe and Tubing
2
safety concerns, if any, associated with its use. It is the (NPS System)
responsibility of the user of this standard to establish appro- C871 Test Methods for Chemical Analysis of Thermal
priate safety and health practices and determine the applica- Insulation Materials for Leachable Chloride, Fluoride,
2
bility of regulatory limitations prior to use. Silicate, and Sodium Ions
C976 Test Method for Thermal Performance of Building
2
Assemblies by Means of a Calibrated Hot Box
C 1045 Practice for Calculating Thermal Transmission
1
This specification is under the jurisdiction of ASTM Committee C16 on 2
Properties from Steady-State Heat Flux Measurements
Thermal Insulation and is the direct responsibility of Subcommittee C16.22 on
Inorganic and Nonhomogeneous Inorganic Thermal Insulation.
Current edition approved Nov. 10, 2001. Published February 2002. Originally
published as C591–66T. Last previous edition C591–00.
2
Annual Book of ASTM Standards, Vol 04.06.
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C591–01
C1058 Practice for Selecting Temperatures for Evaluation 3. Terminology
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and Reporting Thermal Properties of Thermal Insulation
3.1 Fordescriptionsoftermsusedinthisspecification,refer
C1114 TestMethodforSt
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