Sustained Combustion Tester
The Sustained Combustion Tester is designed to determine whether a material can continue to burn when heated and exposed to a flame under controlled conditions. The instrument uses a metal block with a recessed sample well, which is heated to a predetermined temperature. A specific amount of sample is placed in the well, and a standard flame is applied according to test requirements. After flame removal, the material is observed to assess whether sustained combustion occurs.
This test complies with the United Nations “Recommendations on the Transport of Dangerous Goods—Manual of Tests and Criteria,” 4th Revised Edition, and GB/T 21622 “Test Methods for Sustained Combustion of Flammable Liquids.” It is suitable for liquids with flash points not exceeding 60.5 °C in closed-cup tests or 65.5 °C in open-cup tests.
Applications
(1) Testing the sustained combustion behavior of flammable liquids under controlled laboratory conditions.
(2) Evaluating safety of hazardous liquids in transport, storage, and handling scenarios.
(3) Assessing compliance of chemicals with international transport regulations.
(4) Research and development of chemical formulations with reduced flammability risk.
(5) Quality control in chemical and petrochemical industries to prevent fire hazards.
Standards
(1) UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 4th Revised Edition
(2) GB/T 21622: Test Methods for Sustained Combustion of Flammable Liquids (China)
(3) ISO 2592: Determination of Flash and Fire Points—Applicable for Reference in Flammable Liquids Testing
(4) ASTM D4206: Standard Test Method for Sustained Combustion of Flammable Liquids
Product Features
(1) Precision-controlled heating plate with integrated temperature control unit.
(2) Recessed sample well for uniform sample heating.
(3) Adjustable flame application with exact height and width specifications.
(4) Digital temperature monitoring using K-type thermocouples with ±0.1 °C accuracy.
(5) Use of propane or butane as test fuel.
(6) Syringe-based sample dosing for precise 2 ml measurements.
(7) Observational testing procedure to determine sustained vs. non-sustained combustion.
(8) Compliance with international and national flammability test standards.
Technical Parameters
| Parameter | Specification |
|---|---|
| Heating Plate Power | 1000 W |
| Test Temperature | 60.5 °C or 75 °C |
| Temperature Control | K-type thermocouple, ±0.1 °C |
| Flame Height | 8–9 mm |
| Flame Width | 5 mm |
| Burner-to-Sample Distance | 2.2 mm |
| Sample Volume | 2 ml (±0.1 ml) |
| Fuel Type | Propane or Butane |
FAQ
Q1: What types of materials can be tested?
A1: The tester is suitable for flammable liquids with flash points not exceeding 60.5 °C (closed cup) or 65.5 °C (open cup).
Q2: How is sustained combustion defined in this test?
A2: A material is considered to exhibit sustained combustion if:
It ignites and continues to burn after the flame is removed, or
It ignites while the test flame is applied for 15 seconds and continues to burn for more than 15 seconds after flame removal. Intermittent sparks are not considered sustained combustion.
Q3: How is the sample applied to the test well?
A3: Samples are measured using a 2 ml syringe with ±0.1 ml accuracy and placed into the recessed metal sample well.
Q4: How is the flame controlled?
A4: The flame height and width are precisely set at 8–9 mm and 5 mm, respectively, with a burner positioned 2.2 mm above the sample.
Q5: Can the tester accommodate different heating temperatures?
A5: Yes, the heating plate can be set to either 60.5 °C or 75 °C depending on the test requirements.
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