1.1 本规范涵盖了适用于实验室用途和特殊用途的精密级玻璃容量瓶的要求。每个烧瓶应标有字母“A”，以表示符合适用的结构和精度要求。根据制造商的选择，烧瓶可标有识别号（序列号）。 注1: 规范中给出了标准容量瓶的规范 E288年 . 注2: 尺寸为1至25的微容积烧瓶规范 mL在规范中给出 E237 . 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers requirements for glass volumetric flasks of precision grades suitable for laboratory purposes and of specialty use. Each flask shall be marked with the letter “A” to signify compliance with applicable construction and accuracy requirements. Flasks may be marked with an identification number (serial number) at the option of the manufacturer. Note 1: Specifications for standard volumetric flasks are given in Specification E288 . Note 2: Specifications for microvolumetric flasks in sizes from 1 to 25 mL are given in Specification E237 . 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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.