1.1 This specification covers chemically resistant, low expansion Type-I borosilicate glass, Class A, (see Specification E438) used to manufacture beaded end flanged-glass pipe and fittings for pressure and vacuum applications.

1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.