ASTM_C_945_-_05_2012.pdf

Designation:C94505(Reapproved 2012)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 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 prepara-tion and priming,the selection of the rigid cellular polyure-thane system,and the protective insulation coatings for outdoorservice equipment.NOTE1For the purpose of this practice,polyurethane is defined tomean either polyurethane or polyisocyanurate and is hereafter referred toas“PUR/PIR.”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 problems associated with its use.It isthe responsibility of the user of this standard to establishappropriate safety and health practices and determine theapplicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal 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 andFace 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 included in Terminology C168,Definitions D883,and Abbreviations 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/coveringsultraviolet ray-absorbing andwater-shedding protective materials applied over the urethanefoam.3.2.3 density:3.2.3.1 in-place density the weight per unit volume of thecross section of foam from substrate to exposed surface,including all skins(or surfaces).3.2.3.2 core density the weight per unit volume of a singlelayer of foam excluding top and bottom skins or(if present)interlayer skins.3.2.4 foam systemappropriate formulations of two liquidcomponents,polyisocyanate,or A side,and polyol,or B side,for intended applications.3.2.5 ignition barriercement plaster 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.)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 March 1,2012.Published August 2012.Originallyapproved in 1981.Last previous edition approved in 2005 as C94505.DOI:10.1520/C0945-05R12.2For 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 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 International(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.orgCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Significance and Use4.1 This practice facilitates the selection and application ofan insulation system 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 application,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 Preparation5.1 Proper substrate preparation is mandatory