ASTM C1443-99(2005)
(Specification)Standard Specification for Glasses, Portlight, Circular, Fully Tempered
Standard Specification for Glasses, Portlight, Circular, Fully Tempered
ABSTRACT
This specification covers circular, fully tempered, high clarity, flat glasses prescribed for use in portlight applications. The glazing quality float glasses are classified into four types according to the type of edge and the texture of each face. All products should conform to the required values for breaking strength, surface and edge compression, clarity, and warpage and quality of finish.
SCOPE
1.1 This specification covers the requirements for circular, fully tempered, high clarity, flat glasses used for portlight applications.
1.2 The dimensional values stated in English units are to be regarded as standard. The values given in parentheses are for information only.
1.3 The following safety hazard caveat pertains only to the test method portion, Section 11, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C1443 – 99 (Reapproved 2005)
Standard Specification for
Glasses, Portlight, Circular, Fully Tempered
This standard is issued under the fixed designation C1443; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Classification
1.1 This specification covers the requirements for circular, 4.1 Glasses covered by this specification shall be of the
fully tempered, high clarity, flat glasses used for portlight following types, as specified (see 5.1):
applications. 4.1.1 Type 1—Plain edges, both faces polished,
1.2 The dimensional values stated in English units are to be 4.1.2 Type II—Plain edge, one face polished, opposite face
regarded as standard. The values given in parentheses are for frosted,
information only. 4.1.3 Type III—Rabbeted edge, both faces polished, or
1.3 The following safety hazard caveat pertains only to the 4.1.4 Type IV—Rabbeted edge, one face polished, opposite
test method portion, Section 11, of this specification: This face frosted.
standard does not purport to address all of the safety concerns,
5. Ordering Information
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health 5.1 Purchasers should select the preferred options permitted
in this specification, and include the following information in
practices and determine the applicability of regulatory limita-
tions prior to use. procurement documents:
5.1.1 Title, number, and date of this specification,
2. Referenced Documents
5.1.2 Type of portlight glasses, as requested (see 4.1),
2.1 ASTM Standards: 5.1.3 Dimensions of portlight glasses (see 8.1 and 9.3), and
C162 Terminology of Glass and Glass Products 5.1.4 Type, class, and quality of glass (see Specification
C1036 Specification for Flat Glass C1036) and heat treatment (see Specification C1048).
C1048 SpecificationforHeat-TreatedFlatGlass—KindHS, 5.2 Samples—If samples are to be supplied with bids, they
Kind FT Coated and Uncoated Glass should be specifically requested in the invitation for bids and
C1279 Test Method for Non-Destructive Photoelastic Mea- the particular purpose to be served by the bid sample should be
surement of Edge and Surface Stresses in Annealed, clearly stated.
Heat-Strengthened, and Fully Tempered Flat Glass
6. Materials and Manufacture
2.2 ANSI Standard:
ANSI Z1.4 Sampling Procedures and Tables for Inspection 6.1 Material—The glass used shall be glazing quality, float
glass in accordance with the requirements for Specification
by Attributes (DOD Adopted)
C1036, Type I, Class 1, quality q or higher, if required, and
3. Terminology
heat-treated Specification C1048, kind FT.
3.1 Definitions—For definitions of terms used in this speci- 6.2 Marking—Specimens shall exhibit the words “fully
fication, refer to Terminology C162 and also Specifications tempered” approximately ⁄2 in. (12.7 mm) from the edge by
C1036 and C1048 and Test Method C1279. means of etching or sand blasting. Marking shall be done
before heat treating.
This specification is under the jurisdiction of ASTM Committee C14 on Glass
7. Other Requirements
and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat
7.1 Breaking Strength—Glasses shall exhibit satisfactory
Glass.
Current edition approved April 1, 2005. Published April 2005. Originally
resistance to breakage (see 11.1.2.1).
approved in 1999. Last previous edition approved in 1999 as C1443–99. DOI:
7.2 Surface and Edge Compression—Type I and III glasses
10.1520/C1443-99R05.
shall have a surface compression of not less than 10 000 psi or
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM an edge compression of not less than 9700 psi (see 11.1.1.2).
Standards volume information, refer to the standard’s Document Summary page on
7.3 Clarity—When glasses are tested (see 11.1.2.3), black
the ASTM website.
3 and white lines of the clarity target shall be definitely distin-
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
guishable for all parts of the critical area.
4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C1443 – 99 (2005)
TABLE 2 Sampling for Surface and Edge Stress Examination
7.4 Warpage—Glasses shall not exhibit more than ⁄32 in.
and Tests
(0.8 mm) warpage along any line on either face (see 11.1.2.3).
Allowable Number of Allowable Number of
Sample Failures for Surface and Failures for Tests (Load,
8. Dimensions
Lot Size Size Edge Stress Examination Clarity, Warpage)
1-6 all none none
8.1 The dimensions of the specimens shall be as specified in
5.1. The thickness of a circular glass specimen shall not vary
A
7-50 6 load
B
more than ⁄32 in. (0.8 mm) between any two points on its
... ... none clarity: none
C
51-100 14 warpage: none
periphery. Dimensional tolerances for circular cut glasses shall
notexceedvaluesspecifiedinTable1andSpecificationC1036. A
load
B
101-1000 10 none clarity: none
C
warpage: none
9. Finish and Appearance
A
See 11.1.2.1.
B
9.1 Finish—Glasses shall be finished by grinding to the
Supplier may, at his option, test all remaining glasses in the lot for clarity in
accordancewith11.1.2.2andallglassesthatpassshallbeconsideredacceptable.
tolerances specified in 8.1. Edges shall be ground, with corners
C
Supplier may, at his option, test all remaining glasses in the lot for warpage in
chamfered ⁄16 in. (1.6 mm).
accordancewith11.1.2.3andallglassesthatpassshallbeconsideredacceptable.
9.2 Types II and IV—The designated faces of the glasses
shall be uniformly frosted by sand blasting or etching.
11. Inspection, Acceptance and Rejection
9.3 Types III and IV—The edges of the glasses shall be
rabbeted. The depth of the rabbet in the horizontal direction
11.1 Responsibility—The supplier is responsible for inspec-
and in the vertical direction shall be specified by the purchaser
tion of cut specimens unless otherwise specified in the contract
(see 5.1.3). Depth dimensions for the rabbet shall be accurate
or purchase order. Two forms of inspection are required:
to within ⁄32 in. (0.8 mm) when measured from the edge and
examination and test.
from the face of the glass. One edge of the rabbet shall be 11.1.1 Examination—Inspection by examination shall con-
perpendicular to the face of the glass and the other edge of the sist of determining compliance with visual and dimensional
rabbet shall be perpendicular to the edge of the glass such that requirements.
the angle formed by the faces of the rabbet is 90 6 2°. 11.1.1.1 Visual and Dimensional Examinations—All speci-
mens of a sample size selected in accordance with 10.1.1 shall
be examined to verify conformance to all of the requirements
10. Sampling
which do not involve tests or polariscopic examination.The lot
10.1 Inspection Lot—For purposes of inspection, a lot shall
shall be accepted if all of the specimens in the sample (see
consist of not more than 1000 specimens which shall be of a
10.1.1) conform to visual requirements of Section 6.2 and
single thickness, produced in a single plant and offered for
Section 9 and dimensional requirements of Section 8. The lot
delivery at one time.
shall be rejected if any of the specimens in the sample fail to
10.1.1 Sampling for Visual and Dimensional
conformtotheserequirements.Ifthelotisrejectedonthebasis
Examinations—Samples shall be selected in accordance with
of visual and dimensional examination, the supplier may at his
the procedures ofANSI Z1.4 at inspection Level II for exami-
optionexamineallremainingspecimensofthelottodetermine
nation in accordance with 11.1.1.1.
conformance with visual and dimensional requirements. Any
of the specimens of the lot that comply with the visual and
10.1.2 Sampling for Surface and Edge Stress—Samples
dimensional requirements shall be considered acceptable, sub-
shall be selected at random in accordance with Table 2 for
ject to conformance with polariscopic examination require-
examination in accordance with 11.1.1.2. When a lot contains
ments and test requirements.
fewer than seven glasses, or when a special use (see 5.1)
11.1.1.2 Surface and Edge Stresses, (Type I and Type III
requires protection against defects, the sample shall consist of
Glasses)—All specimens of a sample size selected in accor-
all specimens in the lot. Where the lot consists of between 7
dance with 10.1.2 shall be subjected to surface or edge stress
and 50 glasses, the sample shall consist of 6 specimens.Where
examination (see 7.2) to determine if they are fully tempered.
thelotconsistsofbetween51and100glasses,thesampleshall
It is suggested that Type III glasses be tested for surface stress.
consistof14specimens.Lotscontainingmorethan100glasses
Test Method C1279 is recommended for testing edge and
shall be evaluated by means of a sample of 10 specimens.
surface stresses. If any glass specimen from a sample under-
Samples from lots consisting of more than 6 glasses shall
going surface and edge stress examination does not meet the
contain a representative variety of types and diameters.
requiredvalues(see7.2),thelotshallberejectedinaccordance
10.1.3 Sampling for Test—Sampling for all tests to be
with criteria given in Table 2.
performed on specimens shall be in accordance with 10.1.2.
11.1.2 Test Acceptance or Rejection—Inspection by test
shall consist of load, clarity, and warpage tests.
11.1.2.1 Load Test—Allspecimensofasamplesizeselected
TABLE 1 Permitted Tolerances
in accordance with 10.1.3 shall be tested under a load applied
Dimension Tolerance, 6 in. (6 mm)
without shock using the jig illustrated in Fig. 1. Each of the
Diameter ⁄16 (1.6)
specimens shall be placed centrally between the upper and
Depth of rabbet ⁄32 (0.8)
lower steel beams which should be perpendi
...
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