GB/T40302 Plastic Vertical Combustion Tester

1GB/T40302 Plastic Vertical Combustion TesterInstrument Overview:

GB/T40302 Plastic Vertical Combustion TesterIn the process of evaluating the combustion test characteristics of plastic materials for electric bicycles, GB/T 40302 standard is used for testing thin specimens that are prone to bending and specimens that curl up but do not ignite when exposed to fire. This standard specifies a small-scale laboratory screening method for the combustion characteristics of flexible thin specimens when vertically exposed to a small flame ignition source. The experimental principle is to fix one end of a cylindrical sample vertically on a fixture, apply a specified test flame to the other end twice in a row, and evaluate the combustion characteristics of the sample by measuring the residual flame and residual burning time.

2、 Compliant with standards:

GB17761-2024 "Safety Technical Specification for Electric Bicycles";

GB/T 40302-2021 "Determination of Combustion Performance of Plastic Vertical Soft Thin Specimens in Contact with Small Flame Sources";

ISO 9773-2016 "Determination of Burning Behavior of Plastic Thin Flexible Vertical Specimens";

3、 Instrument features:

Control system: PLC control system is usually used to ensure the accuracy and stability of testing;

Operation interface: equipped with a color touch screen, supporting switching between Chinese and English, convenient for users to operate;

Internal volume of the box: Testing space of 0.5 cubic meters, equipped with a glass observation door for easy observation of the testing process;

Burner parameters: The burner has specific size parameters, such as nozzle inner diameter, effective length, etc., and is equipped with air conditioning holes to adjust the flame state;

Flame height and time setting: The flame height can be adjusted according to standard requirements, and the flame application time, residual flame time, and residual burning time can be set arbitrarily to meet different testing needs;

Ignition and recording: Equipped with fully automatic ignition function, it automatically records the time of flame combustion and flameless combustion, and displays the results digitally;

Safety device: equipped with combustible gas leakage alarm device and exhaust system to ensure the safety of the testing process. ‌

4、 Main technical parameters:

1. Box size: 1200mm in length, 600mm in width, and 1300mm in height

2. Test chamber: 0.5m ³, ensuring sufficient air supply for the test

3. Box body paint treatment; Internally baked black paint (standard requirement) corrosion-resistant

The testing instrument consists of an experimental part and a control part, designed in an integrated manner for easy on-site installation and debugging

4. Test fixture: made of 304 stainless steel; Beautiful and corrosion-resistant; The fixture is designed with integrated horizontal and vertical combustion; Easy to operate; Save space;

5. The standard stipulates that the wedge-shaped bracket can be freely extended and retracted; Meet the testing requirements for special materials; Length 120mm ± 2mm, width 20mm ± 1mm; Material: stainless steel; Corrosion resistance;

6. Spray lamp and gas control: The burner angle can be easily adjusted to 0 °, 20 °, and 45 °;

7. The length of the burner tube is 100mm ± 10mm, and the inner diameter is 9.5mm ± 0.3mm; it meets the requirements of IEC60695-11-4 for spray lamps;

8. The blowtorch itself can adjust the flow rate; The blowtorch itself can adjust the air intake volume;

9. High precision pressure regulating valve and pressure gauge 0~0.4Mpa;

10. Flame height: precise control of flame height 20mm ± 2mm;

11. Combustion gas: 98% methane gas or 98% propane gas (usually replaced by liquefied petroleum gas);

12. Temperature testing range: 0-1050 ℃;

13. Flame temperature requirement: The time required to rise from 100 ℃± 5 ℃ to 700 ℃± 3 ℃ should be within 44 ± 2 seconds and 54 seconds ± 2 seconds, respectively;

14. Temperature measuring device: equipped with flame temperature measuring device; Two imported armored (K-type) thermocouples with a diameter of 0.5mm for temperature measurement (dual temperature measurement system, V-0/1/2 (50W) and 5VA/B (500W) levels);

15. Experimental background: black background, background illumination ≤ 20Lux;

16. Experimental process: Manual control of the experimental program, independent ventilation;

17. Control and operation mode: PLC+7-inch touch screen control operation is adopted;

18. Power supply: 1kVA; AC220V 50/60Hz。