Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More C This specification covers the quality requirements of flat, transparent, clear, and tinted glass.
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ASTM D Designation: C — 11? A number in parentheses indicates the year of last reapproval. A superscript epsilon? This standard has been approved for use by agencies of the Department of Defense. Scope 1. This glass is intended to be used primarily for architectural glazing products including: coated glass, insulating glass units, laminated glass, mirrors, spandrel glass, or similar uses.
NOTE 1—Re? Terminology 3. If curved, the length of such a blemish is to be measured from end to end along the curve. The values given in parentheses are for information only.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Referenced Documents 2. Current edition approved Oct.
Published October Originally approved in Last previous edition approved in as C — DOI: ASTM International. This includes glass with ultra high transmittance for additional clarity. Edge color of clear glass can vary so the glass manufacturer should be consulted regarding an application where edge color is an aesthetic consideration. General glazing applications. Production of general use mirrors and other applications.
Typical Use Production of architectural glass products including coated, heat treated, laminated, and other select glass products. Applications in which functional characteristics are a consideration and blemishes are not a major concern. Requirements Production of general use mirrors and other applications. Optional edge work can be speci? See 6. Nonrectangular shapes shall use the same thickness tolerances in Table 2. For linear straight line dimensions of nonrectangular shapes, the length and width requirements in Table 2 shall be used.
For curvilinear dimensions of nonrectangular shapes, tolerances shall be as agreed upon by the involved parties. Discoloration and slight distortion of wire are permissible.
Wired glass may contain numerous gaseous inclusions along the wire. Opening in the mesh shall not exceed 32 mm 11? Opening in the mesh shall not exceed 16 mm 5?
Check with the manufacturer for thickness and dimensional tolerances on random Pattern P3 and special Pattern P4. Scattered areas of non-uniform surface and scattered surface blemishes are permissible. NOTE 4—Patterned glass can vary slightly in both con? Glass edge requirements stated in this standard do not apply to Type II glass. Test Methods 6. View samples in the vertical position at the distance as speci? The viewer shall be positioned perpendicular to the glass surface Fig.
If blemishes are detected, refer to Tables 3 and 4 for evaluation criteria. The allowable blemish sizes listed in Table 3 include associated distortion for Q1 and Q2, but do not include associated distortion for Q3 and Q4.
The inspection shall then progress sequentially to each of the shorter distances for other applicable blemish intensities listed in Table Any blemishes detected from these distances shall be compared with the length and separation criteria for allowable blemishes given in Table 5. For blemish size ranges with different separation distance criteria, the minimum separation distance is determined by the minimum separation distance required for the larger of the two blemishes.
Blemishes in size ranges that are allowed without separation distance criteria shall not be compared with those that have separation criteria. Place sample, with the direction of the draw oriented vertically, at a distance of approximately 4. Start with the glass sample parallel with the zebra board identi? Refer to Table 6 for evaluation criteria. The lower of the two interference angles measured shall be used to compare to the evaluation criteria in Table 6.
The difference in length between the two diagonals D1—D2 shall not exceed the limits set forth in Table 2. Check with the manufacturer for more information. Measurements taken at any point shall meet the tolerance requirements of Table 7 or Table 8, or both. The allowable blemish sizes listed in Table 9 do not include associated distortion. Glass shall be viewed at distance of 1. As an alternate method, the thickness may be measured using two bars with? Package Marking 7. Keywords 8. Length and width of cut size and stock sheets of?
C Within the 3. Typical minimum thickness for DST is 0. F None allowed Allowed with a minimum separation of mm 24 in. F Allowed with a minimum separation of mm 48 in. F Allowed with a minimum separation of mm 60 in. F Allowed with a minimum separation of mm 24 in. For glass thicker than 6. Table 3 does not apply to glass thicker than Allowable blemishes for glass thicker than B See 6.
C See 6. D For Q1 and Q2 only, the blemish size includes associated distortion see 6. E Provided that normally allowable blemishes do not form a cluster that is detectable at mm 6 ft. F See 6. Q1 Quality 1 Distribution Allowed with a minimum separation of mm 60 in. None allowed None allowed Q2 Quality 2 Distribution Allowed with a minimum separation of mm 48 in. None allowed Allowed with a minimum separation of mm 48 in.
Light 75 mm 3 in. Medium 75 mm 3 in. None allowed None allowed Allowed Allowed with a minimum separation of mm 24 in. Heavy mm 6 in. None allowed None allowed None allowed None allowed Allowed Allowed with a minimum separation of mm 24 in. A None allowed None allowed None allowed See 6. Allowed with a minimum separation of mm 48 in. Allowed with a minimum separation of mm 60 in. Not allowed Q6 Quality 6 Allowed Allowed with a minimum separation of mm 24 in.
Table 9 does not apply to glass thicker than C Blemishes not speci? Less than 0. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phone , fax , or service astm. Permission rights to photocopy the standard may also be secured from the ASTM website www.
Standard Specification for Flat Glass
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