GB18047-2017

compressed natural gas as vehicle fuel

车用压缩天然气

GB 18047-2017은(는) 현행 중국 강제 국가 표준입니다: compressed natural gas as vehicle fuel. 산업: 자동차. 주제: 에너지 효율. 시행일: 2018년 4월 1일.

적용 여부는 제품 범위, 인증 경로, 주관 당국 공고, 전환 규정에 따라 달라집니다. 컴플라이언스 판단에 사용하기 전에 번역을 의뢰하거나 공식 출처를 확인하세요.

컴플라이언스 개요

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적용 범위

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.

기술 요구 사항

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.

시험 방법

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.

자주 묻는 질문

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.

적용 참고 사항

유형: 제품
CCS: E24
ICS: 75.060
주관 부처: National Energy Administration
기술 위원회: National Energy Administration