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 es una norma nacional china obligatoria vigente: Automatic sprinkler system - Part 21: Inspector’s test connection. Sector: Medio ambiente. Enfoque: Seguridad de productos. Entrada en vigor: 1 jun 2012.

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 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.

Requisitos técnicos

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.

Métodos de ensayo

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.

Preguntas frecuentes

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.

Indicaciones de aplicabilidad

Tipo: Producto
CCS: C84
ICS: 13.220.10
Organismo competente: National Fire and Rescue Administration
Comité técnico: National Technical Committee on Fire Protection of Standardization Administration of China

Relaciones

Sustituida por:GB 5135.21-2025 (Próxima)