GB5135.8-2003

Automatic sprinkler system--Part 8: Accelerator

自动喷水灭火系统第8部分: 加速器

GB 5135.8-2003 é uma norma nacional chinesa obrigatória vigente: Automatic sprinkler system--Part 8: Accelerator. Setor: Construção. Foco: Segurança de produtos. Entrada em vigor: 1 de mai. de 2004.

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

GB 5135.8-2003 applies specifically to accelerators used in conjunction with dry and dry-wet alarm valves within automatic sprinkler systems. This standard is mandatory for manufacturers producing quick-opening devices designed to accelerate the opening time of dry alarm valves. It is not applicable to standard wet pipe sprinkler systems.

Requisitos técnicos

The standard mandates that accelerators must have a rated working pressure of not less than 1.2 MPa. Materials used for the main body and covers must possess corrosion resistance properties not inferior to cast iron. Critical components like moving parts and bearings must be made of corrosion-resistant materials such as bronze or brass. It sets strict performance criteria for elastic sealing elements (both ribbed and unribbed types), requiring them to withstand specific tensile stress, heat aging, and ozone environments without significant volume expansion or cracking. Furthermore, non-metallic components must endure aging tests without deformation that would hinder normal operation. The standard specifies crucial operational timing and pressure parameters. For instance, the time taken from air release to the opening of the dry alarm valve must not exceed a specific limit. Accelerators must withstand twice the rated working pressure without leakage or permanent deformation. Additionally, devices using materials with a melting point below 800°C must pass a rigorous fire resistance test.

Métodos de ensaio

The standard outlines several critical evaluations, including working cycle tests for springs and diaphragms, and specific tests for elastic sealing elements involving ozone exposure and hot water immersion. Leakage and deformation tests require subjecting the accelerator to twice the rated working pressure for 5 minutes. Other key procedures include action time testing, gas static pressure testing, balance time measurement, blockage testing using wooden toothpick segments, and fire resistance testing conducted according to GB 5135.2-2003.

Perguntas frequentes

What products are regulated under GB 5135.8-2003?

This standard regulates accelerators used in automatic sprinkler systems, specifically those designed to be paired with dry and dry-wet alarm valves. It does not apply to accelerators used in wet pipe systems.

Are there any updates from the previous version of GB 5135.8-2003?

This standard replaced the older GA 80-1994 standard. The primary update in this version is the addition of comprehensive requirements for product packaging, transportation, and storage conditions.

How does GB 5135.8-2003 handle testing methodologies?

The standard incorporates specific testing methodologies by referencing other national standards, such as GB/T 528 for rubber tensile properties and GB 5135.2-2003 for aging and fire resistance tests. Engineers must ensure compliance with both the main standard and its referenced documents.

The summary above provides a high-level overview of GB 5135.8-2003. 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 5135.8-2003 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: C83
ICS: 13.220.20
Órgão competente: National Fire and Rescue Administration
Comitê técnico: National Technical Committee on Fire Protection of Standardization Administration of China

Relações

Substituída por:GB 5135.4-2025 (Futura)