GB18111-2021

Gas storage water heater

燃气容积式热水器

GB 18111-2021 é uma norma nacional chinesa obrigatória vigente: Gas storage water heater. Setor: Construção. Foco: Segurança de produtos. Entrada em vigor: 1 de set. de 2022.

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 storage water heaters with a rated heat input of less than 100kW and a rated volume of less than 500L. It covers appliances using manufactured gas, natural gas, and LPG as specified in GB/T 13611. Manufacturers of these water heaters must comply with this mandatory standard to access the Chinese market.

Requisitos técnicos

The standard specifies comprehensive requirements for materials, structure, and safety devices. Materials must withstand operational temperatures and pressures without contaminating water, and the use of asbestos is strictly prohibited. Safety control devices, including temperature/pressure relief valves and flame supervision devices, must meet specific performance criteria to ensure safe operation. It establishes strict performance requirements covering gas system tightness, heat input accuracy, and combustion conditions. The standard regulates CO concentration in flue gases, flame stability, and combustion noise. Additionally, it sets limits for surface temperature rise to prevent burn hazards and component degradation. For thermal efficiency and hot water performance, the standard differentiates between non-condensing and condensing models. Condensing gas storage water heaters must meet higher thermal efficiency thresholds. It also defines requirements for water temperature control accuracy, overheat cut-off devices, and tank capacity. The standard includes specific requirements for electrical safety and electromagnetic compatibility (EMC) for mains-powered heaters. Furthermore, it introduces NOx emission grading and specific provisions for condensing water heaters regarding condensate drainage and neutralization.

Métodos de ensaio

The standard outlines various testing methods to verify compliance, including: - Gas system tightness test: Checks for leakage in valves and pipes. - Combustion condition test: Evaluates flame transmission, stability, noise, and CO content under no-wind, blocked flue, and windy conditions. - Thermal efficiency test: Measures heat conversion efficiency under rated heat input. - Surface temperature rise test: Assesses burn risks on accessible surfaces and adjacent walls. - Wind resistance and water spray tests: Evaluates performance under adverse weather conditions for outdoor and forced-exhaust models. - Electrical safety and EMC tests: Verifies compliance with GB 4706.1 and relevant EMC standards.

Perguntas frequentes

What products are regulated under GB 18111-2021?

GB 18111-2021 applies to gas storage water heaters with a rated heat input of less than 100kW and a rated volume of less than 500L, using manufactured gas, natural gas, or LPG.

Are there any updates from the previous version of GB 18111?

Yes, compared to GB 18111-2000, the 2021 version updates the scope, modifies technical requirements for safety devices and thermal efficiency, and adds new requirements for condensing models, EMC safety, and NOx emission grading.

Does GB 18111-2021 include requirements for electrical safety?

Yes, for water heaters using AC power, the standard includes mandatory requirements for electrical safety and electromagnetic compatibility (EMC) as specified in the normative appendices.

The summary above provides a high-level overview of GB 18111-2021. 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 18111-2021 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: P 45
ICS: 91.140
Órgão competente: Ministry of Housing and Urban-Rural Development
Comitê técnico: Ministry of Housing and Urban-Rural Development

Relações

Substitui:GB 18111-2000