GB18351-2017
Ethanol gasoline for motor vehicles (E10)
车用乙醇汽油（E10）
GB 18351-2017 is a current mandatory Chinese national standard for Ethanol gasoline for motor vehicles (E10). It appears in the Auto compliance cluster with a energy efficiency focus and has an implementation date of Sep 7, 2017.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to Ethanol gasoline for motor vehicles (E10), which is formulated by blending a specific volume of denatured fuel ethanol and performance-enhancing additives into ethanol gasoline blend components. It covers various fuel grades categorized by research octane number, specifically 89, 92, 95, and 98. This standard is mandatory for all manufacturers and suppliers producing or distributing E10 ethanol gasoline within the Chinese market.
Technical requirements
GB 18351-2017 establishes the mandatory technical specifications (detailed in Chapter 5) for E10 ethanol gasoline, categorized into Stage V, Stage VIA, and Stage VIB based on emission control phases. The standard rigorously defines limits for anti-knock properties (Research Octane Number and Antiknock Index) to ensure engine performance. It sets strict maximum content thresholds for harmful compounds and pollutants, including benzene, aromatics, and olefins, with the limits becoming progressively stricter from Stage V to Stage VIB. The standard also mandates that the ethanol content must be strictly maintained at a specific volume percentage, while explicitly prohibiting the artificial addition of lead, iron, manganese, and other specified oxygenates like methylal. Furthermore, the standard regulates physical properties such as vapor pressure, distillation characteristics, and gum content to ensure optimal combustion and storage stability. Compliance with these phased requirements is critical, as local governments may enforce advanced stages ahead of national deadlines based on regional environmental needs.
Testing methods
The standard outlines a series of standardized testing procedures to verify compliance. Key evaluations include the determination of octane number via both motor method and research method, and the measurement of distillation characteristics to assess volatility. Chemical composition is strictly monitored using gas chromatography and spectrometry to quantify sulfur content, hydrocarbon types, and metallic impurities. Manufacturers must refer to the designated GB/T and SH/T methodologies for precise parameter verification, as alternative international methods like ASTM D7039 are permitted only under specific conditions.
FAQs
What products are regulated under GB 18351-2017?
This standard regulates ethanol gasoline for motor vehicles (E10), which is a blend of denatured fuel ethanol and ethanol gasoline blend components. It covers fuel grades 89, 92, 95, and 98.
Are there any updates from the previous version of GB 18351?
The 2017 version deleted the Stage IV requirements and introduced Stage VIA and Stage VIB limits, primarily tightening the maximum allowed volume fractions for olefins and aromatics. It also updated the scope definition and added a 15-day vapor pressure transition period for gas stations.
How does GB 18351-2017 differ from international fuel standards?
The standard references several international methodologies, such as ASTM D7039 for sulfur content determination. However, manufacturers must verify compliance using the specific GB/T and SH/T testing methods designated as the final arbiters in case of disputes.
The summary above provides a high-level overview of GB 18351-2017. To ensure complete compliance for your fuel 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 18351-2017 today to access all detailed parameter tables, testing procedures, and regulatory notes.
Applicability hints
- Type
- Product
- CCS
- E31
- ICS
- 75.160.20
- Competent department
- National Energy Administration
- Technical committee
- National Energy Administration