GB5135.21-2011

Automatic sprinkler system - Part 21: Inspector’s test connection

自动喷水灭火系统第21部分：末端试水装置

GB 5135.21-2011 est une norme nationale chinoise obligatoire en vigueur : Automatic sprinkler system - Part 21: Inspector’s test connection. Secteur : Environnement. Thème principal : Sécurité des produits. Entrée en vigueur : 1 juin 2012.

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 inspector's test connections used in automatic sprinkler systems. It covers the terminology, classification, requirements, and testing methods for these specific fire protection devices. This standard is mandatory for manufacturers producing end-of-line test equipment for the Chinese market. It references related standards such as GB/T 191 and GB 5135.11 for packaging and coupling requirements.

Exigences techniques

The standard specifies the structural and material requirements for inspector's test connections. Key components, including the test valve and test nozzle, must be made of metal materials with corrosion resistance not lower than brass. The rated working pressure of the device shall not exceed 1.2 MPa, and the protective cover must be red. It outlines strict performance criteria for flow coefficient deviation, strength, and sealing performance. The device must withstand specific pressure multipliers without leakage, deformation, or damage. Manufacturers must ensure the device can operate reliably for at least 1000 cycles without failure or leakage after closing. For electrically operated or signal-feedback models, the standard mandates specific requirements for overload capacity, voltage resistance, and insulation resistance. These electrical components must withstand voltage fluctuations and humid environments, ensuring safe operation under defined electrical stress.

Méthodes d’essai

The standard details comprehensive testing procedures including flow coefficient measurement, strength and sealing tests, and functional and reliability testing (1000 open/close cycles). It also includes a salt spray corrosion resistance test for the nozzle. Electrical variants undergo additional tests for overloading, voltage endurance, and insulation resistance, with pressure gauge performance verified according to GB/T 1226.

Questions fréquentes

What products are regulated under GB 5135.21-2011?

It regulates inspector's test connections (末端试水装置) used in automatic sprinkler systems, which are used to monitor terminal pressure and test system startup, alarm, and linkage functions.

Are there mandatory sections in this standard?

Yes, Chapter 6, Chapter 8, and Section 9.1 are mandatory, while the remaining sections are recommended.

What are the material requirements for the test valve and nozzle?

The test valve and test nozzle must be manufactured using metal materials with a corrosion resistance performance not lower than that of brass.

The summary above provides a high-level overview of GB 5135.21-2011. 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 5135.21-2011 today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Produit
CCS: C84
ICS: 13.220.10
Autorité compétente: National Fire and Rescue Administration
Comité technique: National Technical Committee on Fire Protection of Standardization Administration of China

Relations

Remplacée par:GB 5135.21-2025 (À venir)