1、Designation: C450 18Standard Practice forFabrication of Thermal Insulating Fitting Covers for NPSPiping, and Vessel Lagging1This standard is issued under the fixed designation C450; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, t
2、he year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice provides tables of dimensions of pre-formed pipe insulation that shall be used in fabricating
3、 insula-tion covers for use on valves, ells, tees, flanges, and vessels inthe pressure range from 150 to 1500 psi (1 to 10 MPa). Thesetables, which are part of this standard, are published separatelyas the ASTM Recommended Dimensional Standards for Fab-rication of Thermal Insulation Fitting Covers f
4、or NPS Pipingand Vessel Lagging. In addition, the ADJC0450A tables forShort Radius (SR) and Long Radius (LR) Elbows InsulationFitting Covers for piping are included in this practice. Thetables were developed to provide dimensions for shop fabrica-tion use in forming pipe insulation fitting covers on
5、 NPS pipeoperating at high temperature and low temperature. The tablesalso include dimensions for use in forming thermal insulationinto curved segments, and lagging, for application on vessels.This practice does not apply to reflective-type insulation,insulation on screwed elbows, Short Radius (SR)
6、and LongRadius (LR) Elbows Fitting Covers for tubing, dutchman(extended leg) insulation fitting covers, double-layeredstaggered-joint pipe insulation fitting covers, flexible pre-formed pipe-tube elastomeric foam fitting covers in accordancewith Specification C534/C534M or polyolefin foam fittingcov
7、ers in accordance with Specification C1427.1.1.1 Refer to Guide C1710 when referring to insulationmaterials for fabrication of preformed flexible closed cellinsulated 90 elbows, tees, or similar products.1.2 This practice does not specify fabrication methods.Thermal insulation for fitting covers is
8、formed by numerousfabrication methods. In general, insulations are cut by circularor band saws, shaped by grinders or millers, or molded/preformed. Each method has certain advantages anddisadvantages, depending upon the material to be formed,number of cuts required, material waste permissible, andqu
9、antity of fittings being produced. Fitting parts are assembledusing adhesives and fabrication cements applied using dip pots,rollers, doctor blades, brush, or trowel, depending upon thematerials being used. Any specification of the fabricationtechniques is beyond the scope of this standard.1.3 The v
10、alues stated in inch-pound units are to be regardedas standard. In a few parts of this practice, the values given inparentheses are mathematical conversions to SI units that areprovided for information only and are not considered standard.The dimensional standard tables with fractional inch-pound(I.
11、P.) system provided from the adjunct and in this documentstables are currently not available in decimal and metricequivalents.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish ap
12、pro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for the
13、Development of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal InsulationC534/C534M Specification for Preformed Flexible Elasto-meric
14、 Cellular Thermal Insulation in Sheet and TubularFormC585 Practice for Inner and Outer Diameters of ThermalInsulation for Nominal Sizes of Pipe and TubingC1427 Specification for Extruded Preformed Flexible Cel-lular Polyolefin Thermal Insulation in Sheet and TubularFormC1710 Guide for Installation o
15、f Flexible Closed Cell Pre-formed Insulation in Tube and Sheet Form1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.20 on HomogeneousInorganic Thermal Insulations.Current edition approved April 1, 2018. Published
16、 April 2018. Originallyapproved in 1960. Last previous edition approved in 2017 as C450 17. DOI:10.1520/C0450-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the
17、 standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in th
18、e Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.12.2 ASTM Adjuncts:3Fabrication of Thermal Insulating Covers for NPS Pipingand Vessel Lagging on CD-ROM2.2.1 Adjunct T
19、able of Contents:2.2.1.1 Forward and Introduction:(1) Practice C585 Base Dimensions for NPS Inner Diam-eters with plus and minus tolerance(2) Practice C585 Base Dimensions for NPS Outer Diam-eters with no tolerances2.2.1.2 Insulation Covers for NPS Pipe FittingsShort andLong Radius Welded Elbows2.2.
20、1.3 Coverings for Vessels: Sidewall Cylindrical FlatLaggingSingle-Edge Cut and Double-Edge Cut2.2.1.4 Flanged High thermal insulating materials; thermal in-sulating materialsfabrication; thermal insulating materialsfittings; thermal insulating materialspipeC450 183FIG.1LongRadiusEllsRecommendedDimen
21、sionalStandardsC450 184FIG.1LongRadiusEllsRecommendedDimensionalStandards(continued)C450 185FIG.1LongRadiusEllsRecommendedDimensionalStandards(continued)C450 186FIG.2ShortRadiusEllsRecommendedDimensionalStandardsC450 187FIG.2ShortRadiusEllsRecommendedDimensionalStandards(continued)C450 188FIG.2Short
22、RadiusEllsRecommendedDimensionalStandards(continued)C450 189ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such pa
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26、dard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1810
