1、Designation: C1443 99 (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 la
2、st 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 portlightapp
3、lications.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 port
4、ion, 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-t
5、ions 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 Stres
6、ses 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 C10
7、36 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 p
8、olished, 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
9、.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 specifica
10、lly 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 q
11、3or higher, if required, andheat-treated Specification C1048, kind FT.6.2 MarkingSpecimens shall exhibit the words “fullytempered” approximately12 in. (12.7 mm) from the edge bymeans of etching or sand blasting. Marking shall be donebefore heat treating.7. Other Requirements7.1 Breaking StrengthGlas
12、ses 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
13、 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 A
14、STM 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.,4
15、th Floor, New York, NY 10036, http:/www.ansi.orgCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17.3 ClarityWhen glasses are tested (see 11.1.2.3), blackand white lines of the clarity target shall be definitely distin-guishable for all
16、 parts of the critical area.7.4 WarpageGlasses shall not exhibit more than132 in.(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 than132 in. (0.8
17、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 corner
18、schamfered116 in. (1.6 mm).9.2 Types II and IVThe designated faces of the glassesshall be uniformly frosted by sand blasting or etching.9.3 Types III and IVThe edges of the glasses shall berabbeted. The depth of the rabbet in the horizontal directionand in the vertical direction shall be specified b
19、y the purchaser(see 5.1.3). Depth dimensions for the rabbet shall be accurateto within132 in. (0.8 mm) when measured from the edge andfrom the face of the glass. One edge of the rabbet shall beperpendicular to the face of the glass and the other edge of therabbet shall be perpendicular to the edge o
20、f the glass such thatthe angle formed by the faces of the rabbet is 90 6 2.10. Sampling10.1 Inspection LotFor purposes of inspection, a lot shallconsist of not more than 1000 specimens which shall be of asingle thickness, produced in a single plant and offered fordelivery at one time.10.1.1 Sampling
21、 for Visual and DimensionalExaminationsSamples shall be selected in accordance withthe procedures of ANSI Z1.4 at inspection Level II forexamination in accordance with 11.1.1.1.10.1.2 Sampling for Surface and Edge StressSamplesshall be selected at random in accordance with Table 2 forexamination in
22、accordance with 11.1.1.2. When a lot containsfewer than seven glasses, or when a special use (see 5.1)requires protection against defects, the sample shall consist ofall specimens in the lot. Where the lot consists of between 7and 50 glasses, the sample shall consist of 6 specimens. Wherethe lot con
23、sists of between 51 and 100 glasses, the sample shallconsist of 14 specimens. Lots containing more than 100 glassesshall be evaluated by means of a sample of 10 specimens.Samples from lots consisting of more than 6 glasses shallcontain a representative variety of types and diameters.10.1.3 Sampling
24、for TestSampling for all tests to beperformed on specimens shall be in accordance with 10.1.2.11. Inspection, Acceptance and Rejection11.1 ResponsibilityThe supplier is responsible for inspec-tion of cut specimens unless otherwise specified in the contractor purchase order. Two forms of inspection a
25、re required:examination and test.11.1.1 ExaminationInspection by examination shall con-sist of determining compliance with visual and dimensionalrequirements.11.1.1.1 Visual and Dimensional ExaminationsAll speci-mens of a sample size selected in accordance with 10.1.1 shallbe examined to verify conf
26、ormance to all of the requirementswhich do not involve tests or polariscopic examination. The lotshall be accepted if all of the specimens in the sample (see10.1.1) conform to visual requirements of Section 6.2 andSection 9 and dimensional requirements of Section 8. The lotshall be rejected if any o
27、f the specimens in the sample fail toconform to these requirements. If the lot is rejected on the basisof visual and dimensional examination, the supplier may at hisoption examine all remaining specimens of the lot to determineconformance with visual and dimensional requirements. Anyof the specimens
28、 of the lot that comply with the visual anddimensional requirements shall be considered acceptable, sub-ject to conformance with polariscopic examination require-ments and test requirements.11.1.1.2 Surface and Edge Stresses, (Type I and Type IIIGlasses)All specimens of a sample size selected in acc
29、or-dance with 10.1.2 shall be subjected to surface or edge stressexamination (see 7.2) to determine if they are fully tempered.It is suggested that Type III glasses be tested for surface stress.Test Method C1279 is recommended for testing edge andsurface stresses. If any glass specimen from a sample
30、 under-going surface and edge stress examination does not meet therequired values (see 7.2), the lot shall be rejected in accordancewith criteria given in Table 2.11.1.2 Test Acceptance or RejectionInspection by testshall consist of load, clarity, and warpage tests.11.1.2.1 Load TestAll specimens of
31、 a sample size selectedin accordance with 10.1.3 shall be tested under a load appliedTABLE 1 Permitted TolerancesDimension Tolerance, in. ( mm)Diameter116 (1.6)Depth of rabbet132 (0.8)TABLE 2 Sampling for Surface and Edge Stress Examination andTestsLot SizeSampleSizeAllowable Number ofFailures for S
32、urface andEdge Stress ExaminationAllowable Number ofFailures for Tests (Load,Clarity, Warpage)1-6 all none none7-50.51-1006.14noneloadAclarity: noneBwarpage: noneC101-1000 10 noneloadAclarity: noneBwarpage: noneCASee 11.1.2.1.BSupplier may, at his option, test all remaining glasses in the lot for cl
33、arity inaccordance with 11.1.2.2 and all glasses that pass shall be considered acceptable.CSupplier may, at his option, test all remaining glasses in the lot for warpage inaccordance with 11.1.2.3 and all glasses that pass shall be considered acceptable.C1443 99 (2016)2without shock using the jig il
34、lustrated in Fig. 1. Each of thespecimens shall be placed centrally between the upper andlower steel beams which should be perpendicular as shown inside and end views, respectively. The steel bearings supportingthe specimen shall be spaced on Dimension A so that thespecimen has a clearance of116 in.
35、 (1.6 mm) at either side.Each bearing shall have a leather insert approximately18 in.(3.2 mm) thick over the entire surface between steel and glass.Type III and IV specimens shall be tested with the largediameter down, and the bearings against the bottom face shallextend approximately12 in. (12.7 mm
36、) within the circle of thesmaller diameter. The rate of loading shall be 0.1 6 0.0005 in.(2.54 6 0.0127 mm) per min. When all specimens in a lot areto be tested, each specimen shall be loaded to the value shownin Table 3. (Other values may be obtained, if needed, by linearinterpolation between the n
37、earest values shown in the table.)Specimens not damaged shall be accepted. Each specimen inthe sample size selected in accordance with 10.1.3 shall be loadtested to the corresponding value shown in Table 3.Ifnospecimen breaks, the lot shall be accepted. If one of thespecimens breaks the entire lot s
38、hall be load tested by themethod specified above and specimens not damaged by thattest will be accepted. Lots containing more than 100 specimensshall be evaluated by testing a sample of 10 specimens selectedin accordance with 10.1.3. The sample shall be evaluated bydetermining whether the breaking l
39、oad of each specimen in thesample falls above or below the corresponding values shown inTable 4. (Other values may be obtained, if needed, by linearinterpolation between the nearest values shown in the table.) Ifthe breaking loads of the specimens are greater than or equal tothe specified value, the
40、 lot shall be accepted. If the breakingload of the specimens is less than the specified value, the lotshall be rejected, but the manufacturer shall have the option oftesting such sample of the lot by the method specified aboveand samples not damaged in that test shall be accepted.Appendix X1 provide
41、s rationale for proof load testing.11.1.2.2 Clarity Test (Type I and Type III Glasses)Allspecimens of a sample selected in accordance with 10.1.3 shallbe tested for clarity. The deterioration of the clarity of targetlines due to placing the sample in a light path shall be observedthrough a suitable
42、telescope. The target shall consist of two setsof alternating black and white lines of equal width oriented sothat the lines of the two sets are mutually perpendicular. Thetarget to telescope distance shall be at least 20 ft (6.1 m). Thetelescope shall have a magnifying power of at least 10X, andthe
43、 test aperture shall be 12 in. (12.7 mm) diameter. If thewidth of any of the lines is greater than 0.001 75 in. multipliedby the distance in feet between the target and the objective ofthe telescope, the lot shall be rejected in accordance withcriteria given in Table 2. For example, if the distance
44、betweenthe target and the objective of the telescope is 20.0 ft (6.10 m)the width of any line shall not exceed 0.035 in. (0.889 mm).The sample shall be held normal to the axis of the line of sightof the telescope, and shall be located immediately in front ofthe telescope objective. The sample shall
45、be moved within theplane defined by the two parallel surfaces separated by theFIG. 1 Load Apparatus (see 11.1.2.1)C1443 99 (2016)3thickness of the glass so as to survey the critical area, coveringat least 30 % of this area. The critical area is the central portionof the glass, exclusive of a rim are
46、a which extends inward 1 in.(25.4 mm) from the edge for specimens not over 10 in. (254.0mm) diameter, and exclusive of areas which extend inward112 in. (38.1 mm) in any direction from tong marks, if tongmarks are present.11.1.2.3 Warpage TestAll specimens of a sample selectedin accordance with 10.1.
47、3 shall be tested for warpage. Theannular ring method shall be used to determine warpage. Thetesting apparatus shall consist of an upper and lower annularring, whose outside diameter shall exceed the diameter of theglass to be tested by12 in. (12.5 mm), the inner diameter being212 in. (63.5 mm) less
48、 than the outer diameter. The surface withwhich the glass comes in contact shall be within41000 in.(0.1016 mm) of a mechanical plane surface. The lower annularring shall be placed on a level horizontal surface. The glass tobe tested shall be laid centrally on the annular ring. The topannular ring sh
49、all be centrally placed on top of the glass. If atany location the variation in clearance between the planesurface of the annular rings and the surface of the glass exceeds6132 in. (60.8 mm) when determined with a feeler gage, thelot shall be rejected in accordance with criteria given in Table2.12. Keywords12.1 breakage strength; flat glass; portlight; proof load;tempered glassAPPENDIX(Nonmandatory Information)X1. RELIABILITY OF PROOF LOAD TESTINGX1.1 The sampling specified (see Section 10) is basedprimarily on the load test specifi
