ASTM E960-93 (R2021) pdf free download.Standard Specification for Laboratory Glass Beakers.
4. Material and Annealing
4.1 Beakers shall he made of horosilicate glass conforming to the requirement of Type I, Class A of Specification E438.
4.2 Maximum residual thermal stress shall he such as to conform to Specification E67 1.
5. Design
5.1 Types I and II beakers shall he constructed to have straight sides (the 1 000 through 4 000 cm3 sizes may have slightly tapered sides). Types III and IV beakers shall have slightly tapered sides (the 100 and 200 cm3 may be straight sided). Type V beakers may have slightly tapered or straight sides.
5.2 All styles may have a slightly concave bottom. The junction of the sides with the bottom shall be well rounded.
5.3 The beakers shall be symmetrically made and smoothly finished, the upper edge with a fire polished bead and may he flared outward. Type II beakers may have a tooled flare.
5.4 Types 1, II and III beakers shall have well defined spouts such that the stream of water poured from the lip of the beaker shall pour evenly, and shall not cling to the outside of the beaker and flow oil the bottom when tilting the nearly full beaker at a 45° angle.
6. Capacity and Dimensions
6.1 Beakers shall conform to the requirements of Table 1, Table 2, Table 3, and Table 4.
7. Markings
7.1 Each beaker shall be permanently marked with the name or known trademark of the manufacturer and the nominal capacity, as well as approximate graduation markings that have a limit of error of ±5 % of full capacity. The graduation intervals shall comply with the tables.
7.2 There shall be an area on one side of the beaker, roughened by sand blasting or suitably decorated to provide for marking with pencil.
8. Keywords
8.1 beakers; glass; laboratory
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. 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.ASTM E960 pdf download.