ASTM_C_1443_-_99_2016.pdf

Designation:C144399(Reapproved 2016)Standard Specification forGlasses,Portlight,Circular,Fully Tempered1This standard is issued under the fixed designation C1443;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 specification covers the requirements for circular,fully tempered,high clarity,flat glasses used for portlightapplications.1.2 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 onlyand are not considered standard.1.3 The following safety hazard caveat pertains only to thetest method portion,Section 11,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2C162 Terminology of Glass and Glass ProductsC1036 Specification for Flat GlassC1048 Specification for Heat-Strengthened and Fully Tem-pered Flat GlassC1279 Test Method for Non-Destructive Photoelastic Mea-surement of Edge and Surface Stresses in Annealed,Heat-Strengthened,and Fully Tempered Flat Glass2.2 ANSI Standard:ANSI Z1.4 Sampling Procedures and Tables for Inspectionby Attributes(DOD Adopted)33.Terminology3.1 DefinitionsFor definitions of terms used in thisspecification,refer to Terminology C162 and also Specifica-tions C1036 and C1048 and Test Method C1279.4.Classification4.1 Glasses covered by this specification shall be of thefollowing types,as specified(see 5.1):4.1.1 Type 1Plain edges,both faces polished,4.1.2 Type IIPlain edge,one face polished,opposite facefrosted,4.1.3 Type IIIRabbeted edge,both faces polished,or4.1.4 Type IVRabbeted edge,one face polished,oppositeface frosted.5.Ordering Information5.1 Purchasers should select the preferred options permittedin this specification,and include the following information inprocurement documents:5.1.1 Title,number,and date of this specification,5.1.2 Type of portlight glasses,as requested(see 4.1),5.1.3 Dimensions of portlight glasses(see 8.1 and 9.3),and5.1.4 Type,class,and quality of glass(see SpecificationC1036)and heat treatment(see Specification C1048).5.2 SamplesIf samples are to be supplied with bids,theyshould be specifically requested in the invitation for bids andthe particular purpose to be served by the bid sample should beclearly stated.6.Materials and Manufacture6.1 MaterialThe glass used shall be glazing quality,floatglass in accordance with the requirements for SpecificationC1036,Type I,Class 1,quality q3or higher,if required,andheat-treated Specification C1048,kind FT.6.2 MarkingSpecimens shall exhibit the words“fullytempered”approximately12in.(12.7 mm)from the edge bymeans of etching or sand blasting.Marking shall be donebefore heat treating.7.Other Requirements7.1 Breaking StrengthGlasses shall exhibit satisfactoryresistance to breakage(see 11.1.2.1).7.2 Surface and Edge Compression Type I and III glassesshall have a surface compression of not less than 10 000 psi oran edge compression of not less than 9700 psi(see 11.1.1.2).1This specification is under the jurisdiction of ASTM CommitteeC14 on Glassand Glass Products and is the direct responsibility of Subcommittee C14.08 on FlatGlass.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1999.Last previous edition approved in 2010 as C1443 99(2010).DOI:10.1520/C1443-99R16.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.3 ClarityWhen glasses are tested(see 11.1.2.3),blackand white lines of the clarity target shall be definitely distin-guishable for all parts of the critical area.7.4 WarpageGlasses shall not exhibit more than132in.(0.8 mm)warpage along any line on either face(see 11.1.2.3).8.Dimensions8.1 The dimensions of the specimens shall be as specified in5.1.The thickness of a circular glass specimen shall not varymore than132in.(0.8 mm)between any two points on itsperiphery.Dimensional tolerances for circular cut glasses shallnot exceed values specified in Table 1 and SpecificationC1036.9.Finish and Appearance9.1 FinishGlasses shall be finished by grinding to thetolerances specified in 8.1.Edges shall be ground,with cornersc