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GB21549-2008
Laboratory glassware - Safe requirement of heat resisting glassware
实验室玻璃仪器 玻璃烧器的安全要求
GB 21549-2008 — действующий обязательный национальный стандарт Китая: Laboratory glassware - Safe requirement of heat resisting glassware. Отрасль: Электроника. Тема: Безопасность продукции. Дата вступления в силу: 1 мар. 2009 г..
Применимость зависит от продукции, схемы сертификации, уведомлений компетентных органов и переходных правил. Закажите перевод или проверьте источник, прежде чем использовать эту запись в решениях по соответствию.
Обзор требований
Этот обзор пока доступен только на английском языке.
Область применения
This standard applies to various types of laboratory glassware heat resisting products, specifically including beakers, flasks, and heating dishes. It is essential for manufacturers producing these heat-resistant glass containers used for direct heating and chemical reagent storage. The standard does not apply to non-heat-resistant laboratory glass instruments.
Технические требования
Chapter 4 of this standard outlines the mandatory technical requirements for laboratory glassware. Compliance with these specifications is strictly enforced for all manufacturers to ensure chemical stability and thermal shock resistance. The standard regulates key parameters such as the linear thermal expansion coefficient, water resistance at 98°C, and acid and alkali resistance. Additionally, the standard sets limits on internal stress (measured by birefringence optical path difference) and thermal shock temperature. These requirements guarantee that the glassware can withstand direct heating and sudden temperature changes without compromising the integrity of the contained chemical reagents. The technical indicators are categorized based on product capacity, ensuring that both small and large volume containers meet appropriate safety thresholds. GB/T 6579 and GB/T 15726 are among the referenced standards for testing these properties.
Методы испытаний
The testing methods involve evaluating the linear thermal expansion coefficient using the double-line method or instrument method, as specified in QB/T 2298 and GB/T 16920. Chemical resistance tests include particle water resistance (GB/T 6582), inner surface water resistance (GB/T 4548 and GB/T 4548.2), and resistance to boiling mixed alkali water solution (GB/T 6580). Furthermore, thermal shock resistance and internal stress are assessed according to GB/T 6579 and GB/T 15726 respectively.
Частые вопросы
What products are regulated under GB 21549-2008?
GB 21549-2008 regulates laboratory glassware heat resisting products, including low-form and high-form beakers, round-bottom and flat-bottom flasks, and evaporating dishes.
Are the technical requirements in GB 21549-2008 mandatory?
Yes, Chapter 4 of the standard contains mandatory clauses. Manufacturers must strictly adhere to these safety requirements for thermal expansion, chemical resistance, and internal stress.
What are the inspection rules for GB 21549-2008?
The standard requires both factory exit inspections and type inspections. Factory inspections use a double sampling plan, while type inspections are conducted annually or when significant changes in structure, material, or process occur.
The summary above provides a high-level overview of GB 21549-2008. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 21549-2008 today to access all detailed parameters, tables, and testing procedures.
Подсказки по применимости
- Тип
- Безопасность
- CCS
- N64
- ICS
- 71.040.01
- Компетентное ведомство
- Ministry of Industry and Information Technology
- Технический комитет
- Ministry of Industry and Information Technology