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D187-24 – Standard Test Method Technical Guide
ASTM D187-24 provides a standardized, qualitative method for evaluating the burning properties of kerosene intended for illuminating purposes. Developed under the jurisdiction of ASTM Subcommittee D02.E0 on Burner, Diesel and Non-Aviation Gas Turbine Fuels, this test method subjects the fuel to a 16-hour burn in a specified lamp under controlled conditions. The goal is to assess performance characteristics such as flame stability, burning rate, and chimney deposit formation. It is critical to consult the full standard for detailed apparatus specifications and comprehensive safety protocols.
🛢️ Test Summary and Significance
This test method determines the burning quality of kerosene through a rigorous qualitative assessment. A sample is burned for 16 hours in a standardized lamp under specified conditions. The test is largely qualitative, requiring the reporting of the average rate of burning, the change in the shape and dimensions of the flame, and the density and color of the chimney deposit.
To use this test method as an acceptance criterion in specifications, concrete limits must be established. For example, the permissible change in flame shape and the acceptable appearance of the chimney deposit must be clearly defined. The standard duration of 16 hours is understood if not otherwise explicitly specified in the referring document.
⚠️ Safety Alert: Kerosene is combustible and its vapor is harmful. The user of this standard is responsible for establishing appropriate safety, health, and environmental practices. Specific warning statements are located throughout the parent standard.
⚙️ Procedure and Apparatus Considerations
The kerosene sample is burned in a specific lamp design under conditions that are intentionally more severe than typical household or wick-fed appliance use, allowing for the rapid observation of performance deficiencies. The standard distinguishes itself from the Energy Institute method IP 10, which provides a quantitative evaluation of wick-char-forming tendencies over a 24-hour period. In contrast, ASTM D187-24 offers a qualitative performance evaluation over a standard 16-hour burn.
Proper sampling is critical for representative results. Referenced practices for manual and automatic sampling are outlined in ASTM D4057 (Practice for Manual Sampling of Petroleum and Petroleum Products) and D4177 (Practice for Automatic Sampling of Petroleum and Petroleum Products), respectively. The product being tested must conform to the applicable grades outlined in Specification D3699 for Kerosine. Terminology used throughout the method aligns with Terminology D4175.
📊 Key Measured Properties and Reporting
The reporting requirements for this test method focus on observable changes in the flame and the chimney alongside quantitative consumption data. The following table summarizes the critical parameters evaluated during the 16-hour burn test.
| 🟦 Reporting Parameter | 📐 Specific Criterion | ⚡ Standard Condition |
|---|---|---|
| Test Duration | Total burn time | 16 hours (default) |
| Flame Characteristics | Permissible change in shape and dimensions | Defined by product specification |
| Chimney Deposit | Density and color observation | Defined by product specification |
| Burning Rate | Average consumption over test period | Reported in SI units (e.g., g/h) |
💡 Tip for Specification Writers: Because D187-24 is a qualitative method, the standard itself does not prescribe numerical pass/fail limits for chimney deposit or flame shape change. These limits must be explicitly stated in the product specification or procurement contract to ensure consistent quality control based on this standard.
❓ Frequently Asked Questions
🔍 What is the standard burn time for ASTM D187-24?
The standard test duration is 16 hours. This is understood as the default value if not otherwise specified, as clarified in Section 5.1.1 of the standard.
💡 What is the main difference between ASTM D187-24 and IP 10?
ASTM D187-24 is a qualitative performance evaluation conducted over 16 hours. IP 10 is a quantitative evaluation of wick-char-forming tendencies conducted over 24 hours. Both methods impose more severe conditions than typical applications to accelerate wear and deposit formation.
⚡ What key observations must be reported upon completion?
The test report must include the average rate of burning, an assessment of the change in the shape and dimensions of the flame during the test, and a detailed description of the density and color of the chimney deposit.
📌 Which related ASTM standards are referenced by D187-24?
Key referenced standards include D3699 (Specification for Kerosine), D4057 (Manual Sampling), D4177 (Automatic Sampling), D4175 (Terminology), and D91 (Precipitation Number of Lubricating Oils).