ASTM C945-2005(2017) Standard Practice for Design Considerations and Spray Application of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels《室外容器上刚性蜂窝状聚氨基甲酸.pdf
《ASTM C945-2005(2017) Standard Practice for Design Considerations and Spray Application of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels《室外容器上刚性蜂窝状聚氨基甲酸.pdf》由会员分享,可在线阅读,更多相关《ASTM C945-2005(2017) Standard Practice for Design Considerations and Spray Application of a Rigid Cellular Polyurethane Insulation System on Outdoor Service Vessels《室外容器上刚性蜂窝状聚氨基甲酸.pdf(11页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C945 05 (Reapproved 2017)Standard Practice forDesign Considerations and Spray Application of a RigidCellular Polyurethane Insulation System on Outdoor ServiceVessels1This standard is issued under the fixed designation C945; the number immediately following the designation indicates the
2、year oforiginal adoption or, in the case of revision, 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 concerns itself with the substrate pre
3、para-tion and priming, the selection of the rigid cellular polyure-thane system, and the protective insulation coatings for outdoorservice equipment.NOTE 1For the purpose of this practice, polyurethane is defined tomean either polyurethane or polyisocyanurate and is hereafter referred toas “PUR/PIR.
4、”1.2 The values given in inch-pound are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard may involve hazardous materials,operations, and equipment. This standard does not purport toaddress all of the safety concerns, if any, associated with its
5、use. It is the responsibility of the user of this standard toestablish appropriate safety, health, and environmental prac-tices and determine the applicability of regulatory limitationsprior to use.1.4 This international standard was developed in accor-dance with internationally recognized principle
6、s on standard-ization established in the Decision on Principles for theDevelopment 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
7、 InsulationD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2200 Practice for Use of Pictorial Surface PreparationStandards and Guides for Painting Steel Surfaces2.2 American National Standards:Z87.1 Practice for Occupational and Educational Eye andFa
8、ce Protection32.3 Clemtex Limited Standard:“Anchor Pattern Standard”42.4 National Association of Corrosion Engineers Standard:TM-01-70 Visual Surface Preparation Panels52.5 Other Documents:Safety Precautions in Handling and Spraying of PUR/PIRSystems6,73. Terminology3.1 DefinitionsDefinitions includ
9、ed inTerminology C168,Definitions D883, andAbbreviations D1600 apply to the termsused in this standard.3.2 Definitions of Terms Specific to This Standard:3.2.1 blastingthe process of cleaning surfaces by use ofabrasive particles propelled at high velocity upon the surface tobe cleaned.3.2.2 coatings
10、/coveringsultraviolet ray-absorbing andwater-shedding protective materials applied over the urethanefoam.3.2.3 density:3.2.3.1 in-place densitythe weight per unit volume of thecross section of foam from substrate to exposed surface,including all skins (or surfaces).3.2.3.2 core densitythe weight per
11、 unit volume of a singlelayer of foam excluding top and bottom skins or (if present)interlayer skins.1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.40 on InsulationSystems.Current edition approved Sept. 1, 2017
12、. Published December 2017. Originallyapproved in 1981. Last previous edition approved in 2012 as C945 05 (2012).DOI: 10.1520/C0945-05R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
13、nformation, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from Clemtex Ltd., P.O. Box 15214, Houston, TX 77020.5Available from NACE Internationa
14、l (NACE), 1440 South Creek Dr., Houston,TX 77084-4906, http:/www.nace.org.6Spray Polyurethane Foam Alliance (SPFA), 4400 Fair Lakes Ct, Suite 105,Fairfax, VA, http:/sprayfoam.org7Alliance for the Polyurethane Industry (API), 1300 Wilson Blvd Suite 800,Arlington, VA 22209, http:/polyurethanes.orgCopy
15、right 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 the Decision on Principles for theDevelopment of Internati
16、onal Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.13.2.4 foam systemappropriate formulations of two liquidcomponents, polyisocyanate, or A side, and polyol, or B side,for intended applications.3.2.5 ignition barriercement pl
17、aster or equivalentcoating/covering providing a resistance to ignition of the foaminsulation acceptable to the concerned building or firedepartment(s), or both. (Designated UL test is optional.)4. Significance and Use4.1 This practice facilitates the selection and application ofan insulation system
18、for use at service temperatures be-tween 30 and + 107C (22 and + 225F). Although thesuccessful installation of spray-applied PUR/PIR is influencedby many factors, this practice treats those four areas found tobe of major importance:(1) Substrate preparation,(2) Substrate priming,(3) Insulation appli
19、cation, and(4) Protective coatings.4.2 Abrasive blasting, primer application, spray applicationof the insulation, and protective coating application eachcontribute their unique health and safety hazards to the job siteand will be dealt with in more detail under their respectiveheadings.5. Substrate
20、Preparation5.1 Proper substrate preparation is mandatory to obtain asuccessful foam application. These preparation methods mustremove any contaminants that will interfere with developmentof the maximum adhesion of the urethane foam. The method(s)chosen are dependent upon the contaminants present on
21、thesurface and the end-use design service temperature.5.1.1 Previously Coated Iron and Steel SurfacesThe ad-hesion of spray-applied urethane to previously coated surfacesis directly influenced by the age, type, and condition of thesurface. For this reason any coating that exhibits chalking,peeling,
22、or other evidence of failure or damage must beremoved and an appropriate primer applied. Abrasive blastingis recommended. If blasting is to be accomplished, all itemslisted under Section 6 should be followed. In all cases, thecoated substrate must be cleaned and free of rust, grease, oil,dirt, dust,
23、 moisture, etc., immediately prior to foam spraying byone or more of the following methods: (a) wash with water andallow to dry, (b) brush, (c) broom, or (d) air blast.5.1.2 New Iron or Steel SurfacesField blasting and prim-ing is recommended. All blasting is to be accomplished inaccordance with ite
24、ms listed in Section 6. Shop preparation isalso acceptable with proper field surface preparation of theweld joints and all damaged areas. In all cases, the substrate tobe sprayed with foam shall be free of rust, grease, oil, looseparticles, and mill scale, moisture, dirt, etc. After priming iscomple
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