GB25034-2020

Gas-fired heating and hot water combi-boiler

燃气采暖热水炉

GB 25034-2020 é uma norma nacional chinesa obrigatória vigente: Gas-fired heating and hot water combi-boiler. Setor: Construção. Foco: Segurança contra incêndio. Entrada em vigor: 1 de nov. de 2021.

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 gas-fired heating and hot water combi-boilers with a rated heat input of less than 100 kW, a maximum heating water pressure of 0.6 MPa, and a water temperature of 95°C or below. It covers atmospheric and fully premixed combustion types, including forced exhaust and outdoor models. Manufacturers of gas boilers for the Chinese market must comply with these requirements. It specifically references gases defined in GB/T 13611 (manufactured gas, natural gas, and LPG).

Requisitos técnicos

The standard specifies comprehensive requirements for materials, structure, and safety devices. Materials in contact with gas, flue gas, or condensate must be corrosion-resistant or treated, and the use of asbestos is strictly prohibited. Structural requirements include robust gas pathways, reliable air supply systems, and specific provisions for condensing boilers, such as condensate collection and discharge systems. Manufacturers must ensure that structural integrity is maintained under all foreseeable operating conditions. For regulation, control, and safety, the standard mandates specific configurations for gas control valves, ignition devices, and flame supervision. It introduces requirements for remote controllers and modular boilers, ensuring that local operations take precedence and that individual module failures do not compromise the entire system. Safety devices must trigger non-volatile lockouts in critical fault scenarios to prevent hazards. Regarding performance, the standard sets limits for gas and combustion system tightness, heat input, and operating safety. It defines specific thermal efficiency requirements for both condensing and non-condensing boilers under various load conditions. Additionally, it regulates NOx emissions and CO concentrations in flue gases. Compliance with these performance thresholds is mandatory for market access.

Métodos de ensaio

The standard outlines rigorous testing procedures to verify compliance. Key tests include tightness tests for gas, combustion, and water systems; thermal performance tests to measure heat input and efficiency; and combustion tests to analyze CO and NOx emissions. It also details operational safety tests such as surface temperature rise, flame stability under wind conditions, and pre-purge effectiveness. Manufacturers must conduct both routine factory tests and comprehensive type tests. Electrical safety and electromagnetic compatibility (EMC) are evaluated according to the referenced standards in Appendix I and Appendix J.

Perguntas frequentes

What products are regulated under GB 25034-2020?

GB 25034-2020 regulates gas-fired heating and hot water combi-boilers with a rated heat input under 100 kW. This includes various types such as forced exhaust, forced air supply, and outdoor models, utilizing either atmospheric or fully premixed combustion.

Are there any updates from the previous version of GB 25034?

Yes, the 2020 version replaces GB 25034-2010. Key updates include the addition of requirements for condensing boilers, remote controllers, and modular boilers. It also modifies requirements for airflow monitoring, thermal efficiency, and introduces risk assessment protocols.

How does GB 25034-2020 address condensing boilers specifically?

The standard includes dedicated sections for condensing boilers, covering condensate collection and discharge, flue gas temperature limitation, and specific thermal efficiency requirements at lower water temperatures (e.g., 50°C/30°C). It also mandates durability testing for condensing heat exchangers.

The summary above provides a high-level overview of GB 25034-2020. 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 25034-2020 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: P45
ICS: 91.140
Órgão competente: Ministry of Housing and Urban-Rural Development
Comitê técnico: Ministry of Housing and Urban-Rural Development

Relações

Substitui:GB 25034-2010