ASTM C450-08(2014)
(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 insulation that shall 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 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. 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. 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.
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Standards Content (Sample)
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Designation: C450 − 08 (Reapproved 2014)
Standard Practice for
Fabrication of Thermal Insulating Fitting Covers for NPS
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 2. Referenced Documents
1.1 This practice provides tables of dimensions of pre- 2.1 ASTM Standards:
formed insulation that shall be used in fabricating covers for C168 Terminology Relating to Thermal Insulation
use on valves, ells, tees, flanges, and vessels in the pressure C585 Practice for Inner and Outer Diameters of Thermal
range from 150 to 1500 psi (1 to 10 MPa). These tables, which Insulation for Nominal Sizes of Pipe and Tubing
are part of this standard, are published separately as theASTM
2.2 ASTM Adjuncts:
Recommended Dimensional Standards for Fabrication ofTher- Fabrication of Thermal Insulating Covers for NPS Piping
mal Insulation Fitting Covers for NPS Piping, and Vessel
and Vessel Lagging
Lagging. The tables provide dimensions for use in forming
3. Terminology
pipe fitting covers for NPS pipe operating at high temperature
and low temperature. The tables also include dimensions for
3.1 Definitions—For definitions used in this practice see
use in forming thermal insulation into curved segments, and
Terminology C168.
lagging,forapplicationonvessels.Thispracticedoesnotapply
4. Significance and Use
to reflective-type insulation.
4.1 This system of dimensions provides a guide for forming
1.2 This practice does not specify fabrication methods.
thermal insulation in advance of field application. Forming is
Thermal insulation for fitting covers is formed by numerous
done by cutting, grinding, milling, or molding, depending upon
fabrication methods. In general, insulations are cut by circular
the method most suitable for the thermal insulation being
or band saws, shaped by grinders or millers, or molded. Each
fabricated. It is equally applicable for all service temperature
method has certain advantages and disadvantages, depending
ranges.
upon the material to be formed, number of cuts required,
material waste permissible, and quantity of fittings being
5. Basis of Design
produced. Fitting parts are assembled using adhesives and
5.1 All dimensions presented are based on the use of pipe
fabrication cements applied using dip pots, rollers, doctor
insulation manufactured to Practice C585 and to the Basic
blades, brush, or trowel, depending upon the materials being
Dimensional Standards for Pipe Insulation as given in Tables 1
used.Any specification of the fabrication techniques is beyond
and Tables 2 of the Fabrication of Thermal Insulating Covers
the scope of this standard.
for NPS Piping and Vessel Lagging.
1.3 The values stated in inch-pound units are to be regarded
5.2 The tables provide dimensions for insulation fitting
as standard. The values given in parentheses are mathematical
covers for installation on nominal pipe size (NPS) pipe
conversions to SI units that are provided for information only
operating at high and low temperatures.
and are not considered standard.
1.4 This standard does not purport to address all of the 5.3 Dimensions presented for cutting beveled blocks from
preformed thermal insulation (lags) are based on blocks 6 in.
safety concerns, if any, associated with its use. It is the
(152 mm) wide by the thickness required.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.4 Dimensions given for flanged pairs, flanged fittings, and
bility of regulatory limitations prior to use.
flanged valves do not allow for flange bolt removal. When bolt
1 2
This practice is under the jurisdiction of ASTM Committee C16 on Thermal For referenced ASTM standards, visit the ASTM website, www.astm.org, or
InsulationandisthedirectresponsibilityofSubcommitteeC16.20onHomogeneous contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Inorganic Thermal Insulations. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved April 1, 2014. Published April 2014. Originally the ASTM website.
approved in 1960. Last previous edition approved in 2008 as C450 – 08. DOI: Available from ASTM International Headquarters. Order Adjunct No.
10.1520/C0450-08R14. ADJC0450A. Original adjunct produced in 1976. Adjunct last revised in 2002.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C450 − 08 (2014)
removal is required, the covering length over the fl
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