ASTM C450-18
(Practice)Standard Practice for Fabrication of Thermal Insulating Fitting Covers for NPS Piping, and Vessel Lagging
Standard Practice for Fabrication of Thermal Insulating Fitting Covers for NPS Piping, and Vessel Lagging
SIGNIFICANCE AND USE
4.1 This system of dimensions provides a guide for forming thermal insulation in advance of field application. Forming is done by cutting, grinding, milling, or molding, depending upon the method most suitable for the thermal insulation being fabricated. It is equally applicable for all service temperature ranges.
SCOPE
1.1 This practice provides tables of dimensions of preformed pipe insulation that shall be used in fabricating insulation covers for use on valves, ells, tees, flanges, and vessels in the pressure range from 150 to 1500 psi (1 to 10 MPa). These tables, which are part of this standard, are published separately as the ASTM Recommended Dimensional Standards for Fabrication of Thermal Insulation Fitting Covers for NPS Piping and Vessel Lagging. In addition, the ADJC0450A tables for Short Radius (SR) and Long Radius (LR) Elbows Insulation Fitting Covers for piping are included in this practice. The tables were developed to provide dimensions for shop fabrication use in forming pipe insulation fitting covers on NPS pipe operating at high temperature and low temperature. The tables also include dimensions for use in forming thermal insulation into curved segments, and lagging, for application on vessels. This practice does not apply to reflective-type insulation, insulation on screwed elbows, Short Radius (SR) and Long Radius (LR) Elbows Fitting Covers for tubing, dutchman (extended leg) insulation fitting covers, double-layered staggered-joint pipe insulation fitting covers, flexible preformed pipe-tube elastomeric foam fitting covers in accordance with Specification C534/C534M or polyolefin foam fitting covers in accordance with Specification C1427.
1.1.1 Refer to Guide C1710 when referring to insulation materials for fabrication of preformed flexible closed cell insulated 90° elbows, tees, or similar products.
1.2 This practice does not specify fabrication methods. Thermal insulation for fitting covers is formed by numerous fabrication methods. In general, insulations are cut by circular or band saws, shaped by grinders or millers, or molded/preformed. Each method has certain advantages and disadvantages, depending upon the material to be formed, number of cuts required, material waste permissible, and quantity of fittings being produced. Fitting parts are assembled using adhesives and fabrication cements applied using dip pots, rollers, doctor blades, brush, or trowel, depending upon the materials being used. Any specification of the fabrication techniques is beyond the scope of this standard.
1.3 The values stated in inch-pound units are to be regarded as standard. In a few parts of this practice, the values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. The dimensional standard tables with fractional inch-pound (I.P.) system provided from the adjunct and in this document’s tables are currently not available in decimal and metric equivalents.
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.
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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: C450 − 18
Standard Practice for
Fabrication of Thermal Insulating Fitting Covers for NPS
1
Piping, and Vessel Lagging
This standard is issued under the fixed designation C450; 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 usingadhesivesandfabricationcementsappliedusingdippots,
rollers, doctor blades, brush, or trowel, depending upon the
1.1 This practice provides tables of dimensions of pre-
materials being used. Any specification of the fabrication
formed pipe insulation that shall be used in fabricating insula-
techniques is beyond the scope of this standard.
tion covers for use on valves, ells, tees, flanges, and vessels in
the pressure range from 150 to 1500 psi (1 to 10 MPa). These 1.3 The values stated in inch-pound units are to be regarded
tables, which are part of this standard, are published separately as standard. In a few parts of this practice, the values given in
as the ASTM Recommended Dimensional Standards for Fab- parentheses are mathematical conversions to SI units that are
rication of Thermal Insulation Fitting Covers for NPS Piping provided for information only and are not considered standard.
and Vessel Lagging. In addition, the ADJC0450A tables for The dimensional standard tables with fractional inch-pound
Short Radius (SR) and Long Radius (LR) Elbows Insulation (I.P.) system provided from the adjunct and in this document’s
Fitting Covers for piping are included in this practice. The tables are currently not available in decimal and metric
tables were developed to provide dimensions for shop fabrica- equivalents.
tion use in forming pipe insulation fitting covers on NPS pipe
1.4 This standard does not purport to address all of the
operating at high temperature and low temperature. The tables
safety concerns, if any, associated with its use. It is the
also include dimensions for use in forming thermal insulation
responsibility of the user of this standard to establish appro-
into curved segments, and lagging, for application on vessels.
priate safety, health, and environmental practices and deter-
This practice does not apply to reflective-type insulation,
mine the applicability of regulatory limitations prior to use.
insulation on screwed elbows, Short Radius (SR) and Long
1.5 This international standard was developed in accor-
Radius (LR) Elbows Fitting Covers for tubing, dutchman
dance with internationally recognized principles on standard-
(extended leg) insulation fitting covers, double-layered
ization established in the Decision on Principles for the
staggered-joint pipe insulation fitting covers, flexible pre-
Development of International Standards, Guides and Recom-
formedpipe-tubeelastomericfoamfittingcoversinaccordance
mendations issued by the World Trade Organization Technical
with Specification C534/C534M or polyolefin foam fitting
Barriers to Trade (TBT) Committee.
covers in accordance with Specification C1427.
1.1.1 Refer to Guide C1710 when referring to insulation
2. Referenced Documents
materials for fabrication of preformed flexible closed cell
2
2.1 ASTM Standards:
insulated 90° elbows, tees, or similar products.
C168 Terminology Relating to Thermal Insulation
1.2 This practice does not specify fabrication methods.
C534/C534M Specification for Preformed Flexible Elasto-
Thermal insulation for fitting covers is formed by numerous
meric Cellular Thermal Insulation in Sheet and Tubular
fabrication methods. In general, insulations are cut by circular
Form
or band saws, shaped by grinders or millers, or molded/
C585 Practice for Inner and Outer Diameters of Thermal
preformed. Each method has certain advantages and
Insulation for Nominal Sizes of Pipe and Tubing
disadvantages, depending upon the material to be formed,
C1427 Specification for Extruded Preformed Flexible Cel-
number of cuts required, material waste permissible, and
lular Polyolefin Thermal Insulation in Sheet and Tubular
quantity of fittings being produced. Fitting parts are assembled
Form
C1710 Guide for Installation of Flexible Closed Cell Pre-
formed Insulation in Tube and Sheet Form
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
InsulationandisthedirectresponsibilityofSubcommitteeC16.20onHomogeneous
2
Inorganic Thermal Insulations. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2018. Published April 2018. Originally contact ASTM Customer Service at serv
...
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: C450 − 17 C450 − 18
Standard Practice for
Fabrication of Thermal Insulating Fitting Covers for NPS
1
Piping, and Vessel Lagging
This standard is issued under the fixed designation C450; 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 provides tables of dimensions of preformed pipe insulation that shall be used in fabricating insulation covers
for use on valves, ells, tees, flanges, and vessels in the pressure range from 150 to 1500 psi (1 to 10 MPa). These tables, which
are part of this standard, are published separately as the ASTM Recommended Dimensional Standards for Fabrication of Thermal
Insulation Fitting Covers for NPS Piping and Vessel Lagging. In addition, the ADJC0450A tables for Short Radius (SR) and Long
Radius (LR) Elbows Insulation Fitting Covers for piping are included in this practice. The tables were developed to provide
dimensions for shop fabrication use in forming pipe insulation fitting covers on NPS pipe operating at high temperature and low
temperature. The tables also include dimensions for use in forming thermal insulation into curved segments, and lagging, for
application on vessels. This practice does not apply to reflective-type insulation, insulation on screwed elbows, Short Radius (SR)
&and Long Radius (LR) Elbows Fitting Covers for tubing, dutchman (extended leg) insulation fitting covers, double-layered
staggered-joint pipe insulation fitting covers, flexible preformed pipe-tube elastomeric foam fitting covers in accordance with
Specification C534/C534M or polyolefin foam fitting covers in accordance with Specification C1427.
1.1.1 Refer to Guide C1710 when referring to insulation materials for fabrication of preformed flexible closed cell insulated 90°
elbows, tees, or similar products.
1.2 This practice does not specify fabrication methods. Thermal insulation for fitting covers is formed by numerous fabrication
methods. In general, insulations are cut by circular or band saws, shaped by grinders or millers, or molded/preformed. Each method
has certain advantages and disadvantages, depending upon the material to be formed, number of cuts required, material waste
permissible, and quantity of fittings being produced. Fitting parts are assembled using adhesives and fabrication cements applied
using dip pots, rollers, doctor blades, brush, or trowel, depending upon the materials being used. Any specification of the
fabrication techniques is beyond the scope of this standard.
1.3 The values stated in inch-pound units are to be regarded as standard. In a few parts of this practice, the values given in
parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. The
dimensional standard tables with fractional inch-pound (I.P.) system provided from the adjunct and in this document’s tables are
currently not available in decimal and metric equivalents.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
C168 Terminology Relating to Thermal Insulation
C534/C534M Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form
C585 Practice for Inner and Outer Diameters of Thermal Insulation for Nominal Sizes of Pipe and Tubing
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 Nov. 1, 2017April 1, 2018. Published December 2017April 2018. Originally approved in 1960. Last previous edition approved in 20142017 as
C450 – 08 (2014).C450 – 17. DOI: 10.1520/C0450-17.10.1520/C0450-18.
2
For referenced ASTM standards, vi
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