GB17762-2022

Safe requirements of thermotolerant glassware

耐热玻璃器具的安全要求

GB 17762-2022 é uma norma nacional chinesa obrigatória vigente: Safe requirements of thermotolerant glassware. Setor: Eletrônicos. Foco: Segurança de produtos. Entrada em vigor: 1 de jan. de 2024.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

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 ensaio

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.

Perguntas frequentes

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.

Indicações de aplicabilidade

Tipo: Básica
CCS: N64
ICS: 81.040.01
Órgão competente: Ministry of Industry and Information Technology
Comitê técnico: Ministry of Industry and Information Technology

Relações

Substitui:GB 17762-1999