GB24502-2023

Self-rescuer for coal mine

煤矿用自救器

GB 24502-2023 est une norme nationale chinoise obligatoire en vigueur : Self-rescuer for coal mine. Secteur : Alimentation. Thème principal : Sécurité des produits. Entrée en vigueur : 1 oct. 2024.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

This standard applies to the design, production, inspection, and use of self-rescuers for coal mines (including both isolated chemical oxygen self-rescuers and isolated compressed oxygen self-rescuers). It is mandatory for all manufacturers and mining facilities utilizing these life-saving devices in underground environments. Compliance is essential for any self-rescuer entering the Chinese coal mining market. It does not apply to self-rescuers used in non-mining environments.

Exigences techniques

GB 24502-2023 specifies comprehensive technical requirements for coal mine self-rescuers, replacing the previous GB 24502-2009. The standard categorizes self-rescuers into isolated chemical oxygen and isolated compressed oxygen types, with rated protection times ranging from 30 to 120 minutes. Key requirements include strict performance criteria for the breathing system, ensuring adequate oxygen supply and carbon dioxide absorption. For compressed oxygen self-rescuers, the standard details requirements for constant flow oxygen delivery, manual oxygen delivery, and automatic oxygen delivery systems. Manufacturers must ensure the breathing system maintains oxygen concentrations above specified limits while keeping carbon dioxide levels and inhalation temperatures within safe thresholds. The standard also mandates rigorous material specifications, requiring corrosion-resistant metals and anti-static non-metallic materials for external components. Rubber components must withstand high temperatures and oxygen-rich environments without degradation. Additionally, it sets forth durability requirements, including drop resistance and rolling impact resistance, to ensure device integrity in harsh mining conditions. Furthermore, the standard introduces new requirements for digital pressure indicators on compressed oxygen self-rescuers, which must feature intrinsically safe explosion-proof structures complying with GB/T 3836.1 and GB/T 3836.4. Devices must be designed for a 3-year shelf life and allow trained personnel to don them within 30 seconds.

Méthodes d’essai

The standard outlines a series of rigorous testing methods to verify compliance. Key tests include the protective performance test, which simulates human breathing patterns to measure oxygen and carbon dioxide concentrations, breathing resistance, and inhalation temperature. Gas tightness tests are conducted on both the breathing system and external casing to ensure no leaks occur under pressure. Durability is assessed through drop tests and rolling impact tests. Additionally, the standard specifies tests for material properties, such as flame retardancy and anti-static performance, as well as specific tests for components like pressure indicators, valves, and oxygen cylinders.

Questions fréquentes

What products are regulated under GB 24502-2023?

GB 24502-2023 regulates self-rescuers for coal mines, specifically isolated chemical oxygen self-rescuers and isolated compressed oxygen self-rescuers used in underground mining environments.

Are there any updates from the previous version of GB 24502?

Yes, GB 24502-2023 replaces GB 24502-2009. Key updates include the addition of new models (e.g., ZH45, ZY120), new requirements for digital pressure indicators, revised definitions for rated working duration, and updated testing parameters, such as an increased work rate from 30L/min to 35L/min during protective performance testing.

What is the shelf life of a self-rescuer under this standard?

According to GB 24502-2023, self-rescuers must be designed, produced, and manufactured with a 3-year validity period. Using units must ensure the devices are used within this timeframe.

The summary above provides a high-level overview of GB 24502-2023. 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 24502-2023 today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Produit
CCS: D09
ICS: 13.100
Autorité compétente: National Mine Safety Administration
Comité technique: National Mine Safety Administration

Relations

Remplace:GB 24502-2009