1.1 本规范涵盖了适用于实验室用途的精密和通用等级玻璃量筒的要求。 1.1.1 A类- 每个精度等级的气缸应标有字母“A”，以表示符合适用的结构和精度要求。根据制造商的选择，钢瓶可以标有识别号（序列号）。 1.1.2 B类- 通用气瓶的基本设计与A级气瓶相同。但是，B类气瓶的体积公差应在A类气瓶允许的规定范围的两倍以内。这些钢瓶不需要标记其等级名称。 1.1.3 本标准中未列出的规定容量的产品，当产品符合中列出的下一个较小体积标准产品的公差范围时，可在A类公差中指定 表1 . 1.2 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers requirements for glass graduated cylinders for precision and general purpose grades suitable for laboratory purposes. 1.1.1 Class A— Each cylinder of precision grade shall be marked with the letter “A” to signify compliance with applicable construction and accuracy requirements. Cylinders may be marked with an identification number (serial number) at the option of the manufacturer. 1.1.2 Class B— General purpose cylinders are of the same basic design as Class A cylinders. However, volumetric tolerances for Class B cylinders shall be within twice the specified range allowed for Class A cylinders. These cylinders need not be marked with their class designation. 1.1.3 Product with a stated capacity not listed in this standard may be specified in Class A tolerance when product conforms to the tolerance range of the next smaller volumetric standard product listed in Table 1 . 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.