GB17762-2022

Safe requirements of thermotolerant glassware

耐热玻璃器具的安全要求

GB 17762-2022 es una norma nacional china obligatoria vigente: Safe requirements of thermotolerant glassware. Sector: Electrónica. Enfoque: Seguridad de productos. Entrada en vigor: 1 ene 2024.

La aplicabilidad depende del alcance del producto, la vía de certificación, los avisos de la autoridad competente y las reglas de transición. Solicite una traducción o verifique la fuente antes de usar esta ficha en una decisión de cumplimiento.

Resumen de cumplimiento

Este resumen está disponible por ahora solo en inglés.

Alcance y aplicabilidad

This standard applies to various thermotolerant glassware products, specifically including blown heat-resistant glass (e.g., glass pots, coffee pots) and pressed heat-resistant glass (e.g., microwave-safe dishes). It is mandatory for all manufacturers producing heat-resistant borosilicate glass appliances for the Chinese market. The standard replaces the previous GB 17762-1999.

Requisitos técnicos

The standard specifies comprehensive physical and chemical safety requirements for borosilicate glass products. It regulates the water resistance of the inner surface and glass particles at both 98°C and 121°C. Manufacturers must ensure their products meet the strict chemical durability limits outlined in the standard. Chemical stability is further evaluated through acid resistance (using both spectral and gravimetric methods) and alkali resistance. The standard also mandates a minimum boron trioxide content to ensure the material composition meets heat-resistant criteria. Mechanical and thermal properties are strictly controlled, including internal stress (birefringence) and linear thermal expansion coefficient, which has specific ranges for blown versus pressed glassware. Products must withstand specific thermal shock temperature differentials to be deemed safe. Regarding food safety, the standard sets strict migration limits for heavy metals, specifically lead, cadmium, arsenic, and antimony. These limits vary depending on whether the product is classified as a small or large container.

Métodos de ensayo

Testing methods referenced include GB/T 4548 for inner surface water resistance, GB/T 6582 and GB/T 12416.2 for glass particle water resistance, and GB/T 6579 for thermal shock performance. Chemical migration tests for heavy metals involve boiling the glassware in a 4% acetic acid solution at 98°C for 2 hours, followed by analysis according to GB 31604.34 and GB 31604.24.

Preguntas frecuentes

What products are regulated under GB 17762-2022?

It regulates all types of thermotolerant glassware, including blown items like coffee pots and pressed items like microwave-safe glass dishes.

Are there any updates from the previous version of GB 17762?

Yes, compared to GB 17762-1999, this version adds requirements for boron trioxide content, cadmium migration, and updates the testing conditions for heavy metal extraction from 121°C to 98°C.

Does the standard differentiate between blown and pressed glass?

Yes, the standard specifies different linear thermal expansion coefficient ranges and thermal shock temperature requirements for blown versus pressed thermotolerant glassware.

The summary above provides a high-level overview of GB 17762-2022. 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 17762-2022 today to access all detailed parameters, tables, and testing procedures.

Indicaciones de aplicabilidad

Tipo: Básica
CCS: N64
ICS: 81.040.01
Organismo competente: Ministry of Industry and Information Technology
Comité técnico: Ministry of Industry and Information Technology

Relaciones

Sustituye a:GB 17762-1999