1.1 本规范涵盖了适用于实验室目的和特殊用途的精密等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准确度要求。根据制造商的选择，烧瓶可以标有识别号（序列号）。 附注1: 标准容量瓶的质量标准见质量标准 E288 . 附注2: 规格中给出了1 mL至25 mL的微量容量瓶的质量标准 E237 . 1.2 以SI单位表示的值将被视为标准值。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的标准化原则制定的贸易(TBT)委员会。

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 mL 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.