This specification covers standard dimensional requirements for glass distillation flasks. It includes general purpose flasks and flasks designed for specific tests especially in the petroleum testing area. Distillation flasks shall be of the following types: Type I and Type II. Type II distilling flasks shall be of the following classes: Class 1; Class 2; Class 3; Class 4; and Class 5.

1.1 This specification covers standard dimensional requirements for glass distillation flasks. It includes general purpose flasks and flasks designed for specific tests especially in the petroleum testing area.

Note 1: For packaging standards, choose among Specifications E920, E1157, and E1133.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.