ASTM C450-08

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:C450–02 Designation: C 450 – 08
Standard Practice for
Fabrication of Thermal Insulating Fitting Covers for NPS
1
Piping, and Vessel Lagging
This standard is issued under the fixed designation C 450; 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
1.1This practice provides tables of dimensions of preformed insulation that may be used in fabricating 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. The tables provide dimensions for use in forming pipe fitting covers for 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.
1.2
1.1 Thispracticeprovidestablesofdimensionsofpreformedinsulationthatshallbeusedinfabricatingcoversforuseonvalves,
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. The tables provide dimensions for use in forming pipe fitting covers for 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.
1.2 This practice does not specify fabrication methods. Thermal insulation for fitting covers is formed by numerous fabrication
methods.Ingeneral,insulationsarecutbycircularorbandsaws,shapedbygrindersormillers,ormolded.Eachmethodhascertain
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. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
1.3The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for
information purposes only.
2. Referenced Documents
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2.1 ASTM Standards:
C 168 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
C 585Practice for Inner and Outer Diameters of Rigid Thermal Insulation for Nominal Sizes of Pipe and Tubing (NPS System)
Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
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2.2 ASTM Adjuncts:
ADJC0450 Recommended Dimensional Standards for Fabrication of Thermal Insulating Fitting Covers for NPS Piping and
Vessel Lagging
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.
´1
Current edition approved July 10, 2002. Published November 2002. Originally published as C450–60T. Last previous edition C450–99 .
Current edition approved May 1, 2008. Published May 2008. Originally approved in 1960. Last previous edition approved in 2002 as C 450 – 02.
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, Vol 04.06.volume information, refer to the standard’s Document Summary page on the AST
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