GB5135.4-2003

Automatic sprinkler system--Part4: Dry pipe valves

自动喷水灭火系统第4部分: 干式报警阀

GB 5135.4-2003 é uma norma nacional chinesa obrigatória vigente: Automatic sprinkler system--Part4: Dry pipe valves. 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

This standard applies to dry pipe valves used in automatic sprinkler systems for fire protection. It covers the requirements, testing methods, and inspection rules for these specific control valves. It is not applicable to other accessories beyond the dry pipe valve itself.

Requisitos técnicos

The standard specifies the appearance quality, nominal diameters, and rated working pressure (which must be no less than 1.2 MPa) for dry pipe valves. It mandates that body and cover materials have corrosion resistance not lower than cast iron, and moving parts must use materials like bronze or austenitic stainless steel. It outlines strict requirements for leakage and deformation under various pressure conditions, ensuring the valve prevents water from leaking from the supply side to the outlet side in the set position. The valve must function correctly within a specified pressure range and trigger alarm devices. The standard also details requirements for rigid non-metallic parts and valve seat seals, including aging resistance and tensile stress-strain characteristics. Additionally, it specifies fire resistance criteria for valves made with materials having a melting point below 800°C, requiring them to withstand an 800°C fire test for 15 minutes.

Métodos de ensaio

Testing methods include appearance inspection, working cycle tests (5000 cycles for springs and diaphragms), and aging tests for non-metallic parts (air and warm water aging). It also covers valve body strength tests, leakage and deformation tests, and hydraulic friction loss tests. Functional tests evaluate the valve's operation, anti-reseat mechanisms, and alarm triggering, while a fire resistance test assesses performance under high temperatures.

Perguntas frequentes

What products are regulated under GB 5135.4-2003?

It regulates dry pipe valves used in automatic sprinkler systems, specifically differential-type and mechanical-type dry pipe valves.

What is the minimum rated working pressure required by this standard?

The rated working pressure of the dry pipe valve must be no less than 1.2 MPa.

Does GB 5135.4-2003 reference international standards?

Yes, the standard primarily references ISO 6182.3 for the requirements and test methods of dry pipe valves in automatic sprinkler systems.

The summary above provides a high-level overview of GB 5135.4-2003. 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 5135.4-2003 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)