Fireproof coating combustion testing machine (tunnel method)

Product Name: Fireproof Coating Combustion Testing Machine (Tunnel Method) Product Model: ZY6240 Product Usage: Suitable for testing the flame propagation characteristics of fireproof coatings applied to combustible substrate surfaces in a small tunnel furnace under laboratory conditions. Suitable for the determination of flame propagation performance of decorative fireproof coatings. Manufacturer prices: Non standard customization prices vary, welcome to choose and quote!

1、 Application scope:

The fire-resistant coating combustion testing machine (tunnel method) is suitable for testing the flame propagation characteristics of fire-resistant coatings applied to combustible substrate surfaces in a small tunnel furnace under laboratory conditions.

Suitable for the determination of flame propagation performance of decorative fireproof coatings.

2、 Compliant with standards:

The fire-resistant coating combustion testing machine (tunnel method) complies with GB/T12441-2005 (Appendix B).

3、 Technical parameters:

1. Tunnel furnace:

1.1 Composed of angle steel frame and ceramic fiber board (asbestos cement board).

1.2 The angle steel frame is welded from 35mm<30mmX2mm angle steel. The top of the angle steel frame is 610mm long and 100mm wide, and its longitudinal plane forms a 28 ° angle with the horizontal plane, serving as the support for the specimen.

The entire steel frame is welded onto a K610mm, 100mm wide, and 120mm thick steel base. The low end of the angle steel frame is 185mm from the bottom, and the high end is about 480mm from the base.

1.3 The flue end of the tunnel furnace is open type; There is a 25mm diameter gas supply hole at the center of the lower end of the tunnel furnace, 110mm away from the base.

1.4 The heat-resistant glass observation window is located below the support side of the specimen, made of a piece of 622m long, 50mm wide, and 3mm thick quartz glass or heat-resistant high glass. Mark the glass at intervals of 25mm from one end of 100mm to 500mm.

There is a metal light shield tilted downwards by 60 ° above the observation window. The specimen support consists of a serrated stainless steel calibration plate with a tooth spacing of 25mm.

On the side of the test panel bracket, located above the centerline of the blowtorch, there is a 3mm diameter thermocouple insertion hole, through which the hot contact point of the thermocouple is delivered to the back fire surface of the test piece.

1.6 Tunnel furnaces should be placed indoors without forced ventilation.

2. Burner:

2.1 Burner:

Made of brass material, with a top diameter of 20mm and a height of approximately 200mm. Gas burner with adjustable air intake hole.

2.2 Fuel:

Gas with a purity of over 95%.

2.3 Igniter:

Automatic ignition for high-voltage electronics.

3. Cover plate:

The insulation asbestos board and the steel plate pressed on the asbestos board are composed of dimensions of 600mm in length, 90mm in width, and 10mm in thickness.

4. Temperature monitoring instruments:

4.1 The measurement of flame center temperature adopts an armored thermocouple with an accuracy of Class II, K-type, and an outer diameter of 2.0mm. Range: 1300 ℃.

4.2 Temperature recording: Imported intelligent P.I.D temperature controller (with automatic calculation function) and high-precision PT100 thermocouple sensor and timer are used, with an accuracy of 0.5% ± 1 word.

5. Timer:

0~99.99 seconds setting, resolution: 0.01s, error: 1s/h.

6. Automatic buzzer:

During the experiment, an alarm is triggered every 15 seconds to remind the operator to record the current combustion condition, with a combustion duration of 4 minutes.

7. Testing station:

1 workstation.

8. Sample size:

L900 * W900 has a thickness of 5mm and a smooth surface. The sample must meet the following standard requirements:

8.1 The asbestos standard board is 600 * 90 with a thickness of 6-8mm.

8.2 Rubber wood standard board is 600 * 90, with a thickness of 8-10mm.

9. Gas flow rate:

860ml/min adjustable.

10. Flame temperature:

900 ℃± 2 ℃.

11. Structure of this instrument:

It consists of two main parts: the main control box and the combustion box. The control box is movable.

12. Combustion chamber size:

610mm × 250mm × 520mm.

13. Rack material:

Made of high-quality stainless steel square tube welding, the control box material is electrostatic steel plate, and the surface is treated with spray coating for a smoother and more beautiful appearance.

14. Control box:

Adopting a relay control system, all electronic components are made of domestic good brands, which can better ensure the working performance and detection accuracy of the machine.

15. The equipment has the following safety protection devices:

Power overload, short circuit protection, control circuit overload protection, and ultra-high temperature protection.

16. Power requirements:

AC220 (± 10%) V/50HZ.

17. Standard board equipment:

17.1 Asbestos standard board: The dimensions are 600mm in length, 90mm in width, and 6mm to 8mm in thickness.

17.2 Oak standard board: 600mm in length, 90mm in width, and 8mm to 10mm in thickness, with an air dry density of (0.7 to 0.85) g/cm3.

18. Test substrate:

The test substrate is a first grade five layer plywood with a thickness of (5 ± 0.2) mm. The test panel is 600mm long and 90mm wide. The surface of the test panel should be smooth, without knots or obvious defects.