GB4452-2026

Outdoor fire hydrant

室外消火栓

GB 4452-2026 é uma norma nacional chinesa obrigatória que entrará em vigor: Outdoor fire hydrant. Setor: Meio ambiente. Foco: Segurança de produtos. Entrada em vigor: 1 de fev. de 2027.

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 various outdoor fire hydrants and their dedicated hydrant wrenches installed in fire water supply pipelines. It covers multiple classifications, including overground, underground, and folding types, as well as special-purpose variants such as foam, crashworthy, pressure-regulating, pressure-reducing, and intelligent fire hydrants. It is mandatory for manufacturers producing fire hydrant equipment for the Chinese market.

Requisitos técnicos

The standard specifies comprehensive structural and material criteria, requiring components like the valve body and flanges to be made of grey cast iron or superior materials, while valve seats and connection ports must use cast copper alloys. It defines strict parameters for appearance quality, thread tolerances, and operating mechanisms, explicitly mandating a clockwise-to-close and counterclockwise-to-open switch direction. Manufacturers must ensure the internal minimum flow area is not less than 85% of the nominal size area. For specialized variants, the standard outlines distinct performance metrics. Crashworthy hydrants must be designed so that only a specific component breaks upon impact, leaving the main body and valve intact. Pressure-regulating and pressure-reducing hydrants must maintain stable outlet pressure within defined ranges without pressure oscillation. Additionally, folding hydrants are required to deploy to their operational position within a strict time limit. A major update in this version is the inclusion of requirements for intelligent fire hydrants. These units must feature monitoring capabilities for tilt angle, pressure, valve opening status, and geographical location, transmitting alarms to a management platform. These smart terminals must also withstand harsh environmental and electromagnetic conditions. They are required to meet IP68 enclosure protection, resist electrostatic discharge, and endure extreme temperatures, humidity, and vibrations.

Métodos de ensaio

The standard outlines a rigorous suite of evaluation procedures, including hydrostatic strength testing at 1.5 times the rated working pressure and sealing performance tests under nominal pressure. For mechanical integrity, it specifies impact resistance evaluations for crashworthy models and deployment time measurements for folding types. Intelligent hydrants undergo specialized environmental and electromagnetic compatibility (EMC) tests, referencing standards like GB/T 2423 for temperature/humidity and GB/T 17626 for RF radiation and electrostatic discharge immunity.

Perguntas frequentes

What products are regulated under GB 4452-2026?

GB 4452-2026 applies to various outdoor fire hydrants and their dedicated hydrant wrenches used in fire water supply pipelines. This includes overground, underground, and folding types, as well as special-purpose variants like foam, crashworthy, pressure-regulating, and intelligent fire hydrants.

What are the main updates in GB 4452-2026 compared to the 2011 version?

The 2026 version introduces significant updates, including the addition of performance requirements and testing methods for intelligent fire hydrants (covering tilt, pressure, valve opening, and flow monitoring). It also updates material requirements for hose and suction connections, modifies inlet connection dimensions, and revises the basic dimensions for underground hydrant wrenches.

Does GB 4452-2026 reference any international standards?

Yes, the standard references several national standards (GB/T) for testing methodologies and material specifications, such as GB/T 4208 for IP68 enclosure protection and GB/T 17626 for electromagnetic compatibility. Engineers should review the full translation to understand how these localized requirements align with or differ from international ISO standards.

The summary above provides a high-level overview of GB 4452-2026. 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 4452-2026 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: C84
ICS: 13.220.10
Órgão competente: National Fire and Rescue Administration
Comitê técnico: National Technical Committee on Fire Protection of Standardization Administration of China

Relações

Substitui:GB 4452-2011 (Vigente)