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D6227-24 – Standard Test Method Technical Guide
📋 Scope and Application
ASTM D6227-24a specifies Grades UL82 and UL87 unleaded aviation gasolines, designed for aircraft engines certified by manufacturers and national agencies. These fuels may contain oxygenates within defined limits. Certification is restricted to refiners who blend the fuel from approved components, ensuring traceability and quality control.
⚠️ Important: Reclassifying other products as UL82 or UL87 is not permissible under this specification.
⛽ Fuel Specifications and Requirements
The standard outlines detailed requirements for UL82 and UL87, including octane ratings, volatility, corrosion resistance, and stability. Testing must follow ASTM methods such as D909 for supercharge rating and D873 for oxidation stability. The table below shows the essential characteristics.
| 🟦 Grade | 📏 Octane Method | ⚡ Corrosion Test |
|---|---|---|
| UL82 | D2699 (Research), D2700 (Motor) | D130 (Copper strip) |
| UL87 | D2699 (Research), D2700 (Motor) | D130 (Copper strip) |
Additional testing includes sulfur determination via D1266, D2622, or D3120, and freezing point per D2386.
🧪 Compliance and Test Methods
Adherence to D6227-24 involves a suite of ASTM test methods. The following table lists key methods for property verification.
| 📐 Method | 🎯 Property |
|---|---|
| D86 | Distillation |
| D130 | Copper corrosion |
| D381 | Gum content |
| D873 | Oxidation stability |
| D909 | Supercharge rating |
| D2386 | Freezing point |
| D2622 | Sulfur content |
| D3231 | Phosphorus content |
✅ Note: The standard follows international principles for standardization (WTO TBT Committee).
❓ Frequently Asked Questions
🔍 What are the grades specified in ASTM D6227-24?
The specification has two grades: UL82 and UL87, both unleaded aviation gasolines with potential oxygenate content.
© 2026 TNLab — This article is a technical interpretation for reference only. The original standard as published by ASTM International takes precedence.