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D2274-14 – Standard Test Method Technical Guide
📐 Scope and Test Applicability
This test method, designated D2274-14 (Reapproved 2019), covers the measurement of the inherent stability of middle distillate petroleum fuels under specified oxidizing conditions at 95°C. It is primarily intended for fuels such as gas oil, diesel fuel, No. 2 heating oil, and Navy distillate fuel (F76). Precision measures were established using these fuels, and results may vary for other fuel types.
Exclusions: This test method is not applicable to fuels containing residual oil. Additionally, it has not been validated for testing biodiesel meeting Specification D6751 or blends of middle distillates and biodiesel. For such fuels, Test Method D7462 is recommended.
⚙️ Test Procedure and Key Parameters
The accelerated oxidation test is conducted at 95°C under specified conditions. The standard ensures consistent evaluation of oxidation stability by controlling temperature and exposure. Samples are conditioned and analyzed for insoluble residues or gum formation. Refer to the full standard for detailed apparatus and procedure.
💡 Tip: When testing samples that may contain biodiesel, note that the membrane filter can be compromised, leading to erroneous results. Always verify fuel composition before testing.
📊 Related Standards and References
The standard references several ASTM methods for fuel testing:
| 🟦 Designation | 📏 Description |
|---|---|
| D381 | Gum Content in Fuels by Jet Evaporation |
| D943 | Oxidation Characteristics of Inhibited Mineral Oils |
| D4625 | Middle Distillate Fuel Storage Stability at 43°C |
| D7462 | Oxidation Stability of Biodiesel and Blends (Withdrawn 2016) |
⚠️ Warning: This standard does not purport to address all safety concerns. Users must establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations.
❓ Frequently Asked Questions
🔍 What is the primary purpose of D2274?
This test method measures the inherent oxidation stability of middle distillate petroleum fuels under accelerated conditions at 95°C, providing an indication of fuel stability during storage.
💡 Does D2274 apply to biodiesel blends?
No, this test method has not been validated for biodiesel (B100) or blends of middle distillates and biodiesel. Test Method D7462 is recommended for such fuels.
⚡ What is the specified test temperature?
The accelerated oxidation test is conducted at 95°C, as specified in the scope of the standard.
📌 Can fuels containing residual oil be tested with D2274?
No, this test method is not applicable to fuels containing residual oil. It is designed specifically for middle distillate fuels.