ASTM C585-22

Standard Practice for Inner and Outer Diameters of Thermal Insulation for Nominal Sizes of Pipe and Tubing

SIGNIFICANCE AND USE
4.1 The purpose of this practice is to ensure satisfactory fit on standard sizes, to accommodate radial expansion of pipes and tubes which are heated after being insulated, and to minimize the number of insulation sizes and thicknesses to be manufactured and stocked.  
4.2 While it is possible to manufacturer insulation to these recommended dimensions, exercise care in attempting to nest layers of different materials, or layers supplied by different manufacturers. Individual manufacturing processes will operate at slightly different tolerances. While the product will fit the pipe, it is possible that it will not readily nest as the outer layer between the different materials, or with a different manufacturer, and possibly the same manufacturer. Exercise care to determine these differences before specifying or ordering nesting sizes.  
4.3 The wide range of outer diameter dimensional tolerances will prevent many pipe and tube insulations from nesting for staggered joints or double layered applications, or both unless specified when ordered from the manufacturer, distributor, or fabricator.  
4.4 Dimensions in accordance with this practice do not necessarily permit application of one thickness of pipe insulation over another (Nesting or Simplified Dimensional System) to obtain total thicknesses greater than those manufactured as single layer, or for multilayer application when desired.  
FIG. 3 Hinged Section Measurement Location
SCOPE
1.1 This practice is intended as a dimensional standard for preformed thermal insulation for pipes and tubing.  
1.2 This practice covers insulation supplied in cylindrical sections and lists recommended single layer inner and outer diameters of insulation having nominal wall thicknesses from 1/2 to 5 in. (13 to 127 mm) to fit over standard sizes of pipe and tubing.  
1.3 The values stated in inch-pound units are to be regarded as the standard. The values stated in SI units are provided for information only.  
1.4 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.  
1.5 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: 30-Apr-2022
• ICS: 27.220 - Heat recovery. Thermal insulation
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.20 - Homogeneous Inorganic Thermal Insulations

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: C585 − 22
Standard Practice for
Inner and Outer Diameters of Thermal Insulation for
1
Nominal Sizes of Pipe and Tubing
This standard is issued under the fixed designation C585; 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.
1. Scope 4. Significance and Use
1.1 This practice is intended as a dimensional standard for
4.1 The purpose of this practice is to ensure satisfactory fit
preformed thermal insulation for pipes and tubing.
on standard sizes, to accommodate radial expansion of pipes
and tubes which are heated after being insulated, and to
1.2 This practice covers insulation supplied in cylindrical
minimize the number of insulation sizes and thicknesses to be
sections and lists recommended single layer inner and outer
manufactured and stocked.
diameters of insulation having nominal wall thicknesses from
1
⁄2 to 5 in. (13 to 127 mm) to fit over standard sizes of pipe and
4.2 While it is possible to manufacturer insulation to these
tubing.
recommended dimensions, exercise care in attempting to nest
layers of different materials, or layers supplied by different
1.3 The values stated in inch-pound units are to be regarded
manufacturers. Individual manufacturing processes will oper-
as the standard. The values stated in SI units are provided for
ate at slightly different tolerances.While the product will fit the
information only.
pipe, it is possible that it will not readily nest as the outer layer
1.4 This standard does not purport to address all of the
between the different materials, or with a different
safety concerns, if any, associated with its use. It is the
manufacturer, and possibly the same manufacturer. Exercise
responsibility of the user of this standard to establish appro-
care to determine these differences before specifying or order-
priate safety, health, and environmental practices and deter-
ing nesting sizes.
mine the applicability of regulatory limitations prior to use.
4.3 The wide range of outer diameter dimensional toler-
1.5 This international standard was developed in accor-
ances will prevent many pipe and tube insulations from nesting
dance with internationally recognized principles on standard-
for staggered joints or double layered applications, or both
ization established in the Decision on Principles for the
unless specified when ordered from the manufacturer,
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical distributor, or fabricator.
Barriers to Trade (TBT) Committee.
4.4 Dimensions in accordance with this practice do not
necessarily permit application of one thickness of pipe insula-
2. Referenced Documents
tion over another (Nesting or Simplified Dimensional System)
2
2.1 ASTM Standards:
to obtain total thicknesses greater than those manufactured as
C168 Terminology Relating to Thermal Insulation
single layer, or for multilayer application when desired.
C302 Test Method for Density and Dimensions of Pre-
formed Pipe-Covering-Type Thermal Insulation
5. Summary of Practice
3. Terminology 5.1 This practice provides for each pipe and tubing sizes the
inner diameters with tolerances for calcium silicate, cellular
3.1 Definitions—Definitions pertaining to insulation are de-
foam plastics, cellular glass, mineral fiber, and perlite pre-
fined in Terminology C168.
formed pipe and tubing insulation identified by Table 1 and
Table 2.
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
5.2 This practice provides for each pipe and tubing sizes the
InsulationandisthedirectresponsibilityofSubcommitteeC16.20onHomogeneous
Inorganic Thermal Insulations.
outer diameters for calcium silicate, cellular foam plastics,
Current edition approved May 1, 2022. Published June 2022. Originally
cellular glass, mineral fiber, and perlite preformed pipe and
approvedin1966toreplaceC312andC521.Lastpreviouseditionapprovedin2016
tubing insulation identified by Table 3, Table 4, Table 5 and
as C585 – 10 (2016). DOI: 10.1520/C0585-22.
2
Table 6.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.3 This practice provides for a range of pipe and tubing
Standards volume information, refer to the standard’s Document Summary page on
theASTM website. sizes the outer diameter tolerances for calcium silicate and
Copyright © ASTM International, 100 Barr Harbor Drive, PO
...

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: C585 − 10 (Reapproved 2016) C585 − 22
Standard Practice for
Inner and Outer Diameters of Thermal Insulation for
1
Nominal Sizes of Pipe and Tubing
This standard is issued under the fixed designation C585; 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.
1. Scope
1.1 This practice is intended as a dimensional standard for preformed thermal insulation for pipes and tubing.
1.2 This practice covers insulation supplied in cylindrical sections and lists recommended single layer inner and outer diameters
1
of insulation having nominal wall thicknesses from ⁄2 to 5 in. (13 to 127 mm) to fit over standard sizes of pipe and tubing.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values stated in SI units are provided for
information only.
1.4 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.
1.5 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
2.1 ASTM Standards:
C168 Terminology Relating to Thermal Insulation
C302 Test Method for Density and Dimensions of Preformed Pipe-Covering-Type Thermal Insulation
3. Terminology
3.1 Definitions—Definitions pertaining to insulation are defined in Terminology C168.
4. Significance and Use
4.1 The purpose of this practice is to ensure satisfactory fit on standard sizes, to accommodate radial expansion of pipes and tubes
which are heated after being insulated, and to minimize the number of insulation sizes and thicknesses to be manufactured and
stocked.
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.20 on Homogeneous
Inorganic Thermal Insulations.
Current edition approved May 1, 2016May 1, 2022. Published May 2016June 2022. Originally approved in 1966 to replace C312 and C521. Last previous edition approved
in 20102016 as C585 – 10.C585 – 10 (2016). DOI: 10.1520/C0585-10R16.10.1520/C0585-22.
2
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C585 − 22
4.2 While it is possible to manufacturer insulation to these recommended dimensions, exercise care in attempting to nest layers
of different materials, or layers supplied by different manufacturers. Individual manufacturing processes will operate at slightly
different tolerances. While the product will fit the pipe, it is possible that it will not readily nest as the outer layer between the
different materials, or with a different manufacturer, and possibly the same manufacturer. Exercise care to determine these
differences before specifying or ordering nesting sizes.
4.3 The wide range of outer diameter dimensional tolerances will prevent many pipe and tube insulations from nesting for
staggered joints or double layered applications, or both unless specified when ordered from the manufacturer, distributor, or
fabricator.
4.4 Dimensions in accordance with this practice do not necessarily permit application of one thickness of pipe insulation over
another (Nesting or Simplified Dimensional System) to obtain total thicknesses greater than those manufactured as single layer,
or for multilayer application when desired.
5. Summary of Practice
5.1 This practice provides for each pipe and tubing sizes the inner diameters with tolerances for calcium silicate, cellular foam
plastics, cellular glass, mineral fiber, and perlite preformed pipe and tubing insulation identified by Table 1 and Table 2.
5.2 This practice provides fo
...