ASTM C450-2008 Standard Practice for Fabrication of Thermal Insulating Fitting Covers for NPS Piping and Vessel Lagging《公称尺寸的管件、容器隔热层用绝热配件覆盖物生产的标准实施规范》.pdf
《ASTM C450-2008 Standard Practice for Fabrication of Thermal Insulating Fitting Covers for NPS Piping and Vessel Lagging《公称尺寸的管件、容器隔热层用绝热配件覆盖物生产的标准实施规范》.pdf》由会员分享,可在线阅读,更多相关《ASTM C450-2008 Standard Practice for Fabrication of Thermal Insulating Fitting Covers for NPS Piping and Vessel Lagging《公称尺寸的管件、容器隔热层用绝热配件覆盖物生产的标准实施规范》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 450 08Standard Practice forFabrication of Thermal Insulating Fitting Covers for NPSPiping, and Vessel Lagging1This standard is issued under the fixed designation C 450; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、 the 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 insulation that shall be used in fabricating co
3、vers foruse on valves, ells, tees, flanges, and vessels in the pressurerange from 150 to 1500 psi (1 to 10 MPa). These tables, whichare part of this standard, are published separately as the ASTMRecommended Dimensional Standards for Fabrication of Ther-mal Insulation Fitting Covers for NPS Piping, a
4、nd VesselLagging. The tables provide dimensions for use in formingpipe fitting covers for NPS pipe operating at high temperatureand low temperature. The tables also include dimensions foruse in forming thermal insulation into curved segments, andlagging, for application on vessels. This practice doe
5、s not applyto reflective-type insulation.1.2 This practice does not specify fabrication methods.Thermal insulation for fitting covers is formed by numerousfabrication methods. In general, insulations are cut by circularor band saws, shaped by grinders or millers, or molded. Eachmethod has certain ad
6、vantages and disadvantages, dependingupon the material to be formed, number of cuts required,material waste permissible, and quantity of fittings beingproduced. Fitting parts are assembled using adhesives andfabrication cements applied using dip pots, rollers, doctorblades, brush, or trowel, dependi
7、ng upon the materials beingused. Any specification of the fabrication techniques is beyondthe scope of this standard.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only
8、and are not considered standard.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 appro-priate safety and health practices and determine the applica-bility of regulatory limitati
9、ons prior to use.2. Referenced Documents2.1 ASTM Standards:2C 168 Terminology Relating to Thermal InsulationC 585 Practice for Inner and Outer Diameters of RigidThermal Insulation for Nominal Sizes of Pipe and Tubing(NPS System)2.2 ASTM Adjuncts:3ADJC0450 Recommended Dimensional Standards for Fab-ri
10、cation of Thermal Insulating Fitting Covers for NPSPiping and Vessel Lagging3. Terminology3.1 DefinitionsFor definitions used in this practice seeTerminology C 168.4. Significance and Use4.1 This system of dimensions provides a guide for formingthermal insulation in advance of field application. For
11、ming isdone by cutting, grinding, milling, or molding, depending uponthe method most suitable for the thermal insulation beingfabricated. It is equally applicable for all service temperatureranges.5. Basis of Design5.1 All dimensions presented are based on the use of pipeinsulation manufactured to P
12、ractice C 585 and to the BasicDimensional Standards for Pipe Insulation as given in Tables 1and Tables 2 of the ASTM Recommended Dimensional Stan-dards for Prefabrication and Field Fabrication of ThermalInsulation Fitting Covers for NPS Piping, and Vessel Lagging.31This practice is under the jurisdi
13、ction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.20 on HomogeneousInorganic Thermal Insulations.Current edition approved May 1, 2008. Published May 2008. Originallyapproved in 1960. Last previous edition approved in 2002 as C 450 02.2For reference
14、d 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 standards Document Summary page onthe ASTM website.3Available at a nominal cost from fromASTM International Headquarters. Orde
15、rAdjunct No. ADJC0450.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2 The tables provide dimensions for insulation fittingcovers for installation on nominal pipe size (NPS) pipeoperating at high and low temperatures.5.3 Dimension
16、s presented for cutting beveled blocks frompreformed thermal insulation (lags) are based on blocks 6 in.(152 mm) wide by the thickness required.5.4 Dimensions given for flanged pairs, flanged fittings, andflanged valves do not allow for flange bolt removal. When boltremoval is required, the covering
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