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GB18047-2017
compressed natural gas as vehicle fuel
车用压缩天然气
GB 18047-2017 — действующий обязательный национальный стандарт Китая: compressed natural gas as vehicle fuel. Отрасль: Авто. Тема: Энергоэффективность. Дата вступления в силу: 1 апр. 2018 г..
Применимость зависит от продукции, схемы сертификации, уведомлений компетентных органов и переходных правил. Закажите перевод или проверьте источник, прежде чем использовать эту запись в решениях по соответствию.
Обзор требований
Этот обзор пока доступен только на английском языке.
Область применения
This standard applies to compressed natural gas (CNG) used specifically as a vehicle fuel, operating at pressures not exceeding 25 MPa. It is applicable to gas composition used in automotive applications and does not cover liquefied natural gas (LNG) or industrial gas specifications. Manufacturers and suppliers of CNG for the Chinese automotive market must comply with this standard.
Технические требования
This standard outlines the technical specifications for vehicle fuel CNG, focusing on critical parameters such as high heating value, total sulfur, hydrogen sulfide, carbon dioxide, and oxygen content. Clause 4.1 detailing these technical indicators is mandatory. A significant update in this version is the stricter limit on total sulfur, which has been reduced from previous allowances to a maximum of 100 mg/m³. The standard also specifies stringent water content and water dew point requirements to prevent liquid formation and corrosion, aligning with ISO 15403-2:2006 recommendations. Additionally, the standard mandates that CNG must not contain liquid hydrocarbons under operating conditions and must have solid particle diameters smaller than 5 μm. It also requires the gas to have a noticeable odor, necessitating odorization if natural odor is insufficient. Supplementary requirements address the anti-knock performance, calculated via the Methane Number (MN), and the Wobbe index, categorizing the gas into 10T and 12T classifications to ensure engine compatibility.
Методы испытаний
The standard references various GB/T methods for determining gas composition and impurities. Key testing includes gas chromatography for heating value and component analysis (referencing GB/T 13610 and GB/T 27894 series), and chemical or physical methods for total sulfur and hydrogen sulfide content (referencing GB/T 11060 series). For water content and dew point, testing methods include the cooling mirror condensation hygrometer method (GB/T 17283) and Karl Fischer coulometric method (GB/T 18619.1). Specific arbitration methods are designated for each parameter to resolve compliance disputes.
Частые вопросы
What products are regulated under GB 18047-2017?
This standard regulates compressed natural gas (CNG) used specifically as a vehicle fuel, operating at pressures not exceeding 25 MPa.
Are there any updates from the previous version of GB 18047?
The 2017 version imposes stricter limits, notably reducing the maximum total sulfur content from 200 mg/m³ to 100 mg/m³. It also modified the water content requirement to a mass concentration limit of 30 mg/m³ and updated gas categories in Appendix B.
How does GB 18047-2017 differ from ISO standards?
The standard aligns its water content metric with ISO 15403-2:2006 recommendations. It also references international methodologies like the ASTM motor octane number rating for calculating the Methane Number (MN) in Appendix A.
The summary above provides a high-level overview of GB 18047-2017. 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 18047-2017 today to access all detailed parameters, tables, and testing procedures.
Подсказки по применимости
- Тип
- Продукция
- CCS
- E24
- ICS
- 75.060
- Компетентное ведомство
- National Energy Administration
- Технический комитет
- National Energy Administration
Связи
Заменяет:GB 18047-2000