company news about UL790 Roofing Material, Fire Resistance Performance, Flame Retardant Performance Tester for Photovoltaic Cells

Scope of application:

These requirements cover all roofing materials that leak into the exterior of the building to simulate a fire, and are used for roofing materials installed on combustible or non-combustible substrates. It is to evaluate the fire resistance of roofs and modules under simulated real-world conditions, and to evaluate the grade of the specimen at A1.82m, B 2.4m and C 3.9m. At the same time, it can be used in the flame retardant performance test of photovoltaic cell modules.

Standards:

UL 1730: Smoke detector monitors for self-contained living units in multifamily dwellings and hotel/motel rooms: motorized annunciators detect residential soot conditions;

UL 790: Standard Test Method for Fire Testing of Roof Coverings;

IEC 61730-2 Photovoltaic Modules Appendix A Fire Test Flame propagation;

ASTM F 108 - 04 : Standard Test Method for Fire Testing of Roof Coverings;

NFPA 256 Fire Test for Roof Coverings;

Performance Parameters:

The slope of the deck is controlled by cylinders

A test deck is attached to the fireproof board

The temperature is regulated in stages using an automatic control valve

Plywood roof covering material in sizes 1,300 (W) × 1,000 (D) × 120 (H) for mounting test samples;

Non-flammable test plate, installed at the end of the test plate, can block the generation of tempering under the test plate;

Stainless steel sector adjustment plate, adjustable test angle, dimensions: 1,440(L) x 940(H) mm;

Non-combustible plate assembly, mounted at the front of the frame, simulating the eaves and cornices, extending the flame from the burner to the specimen, dimensions: 330(W) x 2,130(D) x 584(H) mm;

Separate exhaust ducts to extract air from outside the laboratory;

A honeycomb filter is installed in the air duct, and a guide vane is installed at the gas inlet;

The ventilation duct is equipped with a slope adjustment panel for adjusting the direction of air flow;

The ventilation duct is equipped with a guide plate to strengthen the wind speed to ensure that the airflow supplying the test plate is not disturbed by the outside world, and the guide plate is made of stainless steel, and the position does not change with the change of wind pressure;

The air duct material is made of stainless steel, which is corrosion-resistant and high-temperature resistant, and the dimensions are: 2,130 (W) x 762 (H) x 3,000 (L) mm;

The fan is 220V, 50HZ, three-phase electric, equipped with a reverse system that can automatically adjust the wind speed, and the flow rate is 300m3/min;

Infinitely variable speed reverser, 0-100% adjustable;

Gas burner (for intermittent fire, flame propagation and flying fire test), 1.12m long, 60.3mm in diameter, with a 12.7mm (width) x 0.91m (length) slit on the side towards the test board;

The gas burner can provide 22,000 Btu/min (387 kWh) and can automatically adjust the gas flow rate according to the three combustion levels of A, B and C.

A thermocouple is installed at 58.7mm at the top of the burner, which can test the temperature of 888±28°C;

Automatic ignition system to ensure the safety performance of the test, ignition electrode high voltage is 1.8kVp mass flow controller;

Automatic temperature control system;

Class A、 B:760±28℃(1400 ±50℉)- 21,000~ 22,000 Btu/min（369~387 kWh）

- Class C: 704±28°C (1300 ±50°F) -18,000 ~ 19,000 Btu/min (316 ~ 334 kWh) for each gas burner to follow different test and control methods;

High-precision pressure gauge and pressure regulating valve control gas pressure;

- LNG: Precise measurement of gas flow with MFM (air flow is controlled by an automatic control valve);

- LPG: Adjusted air flow rate using an inverter system: 19±8 km/h (5.5m/sec) on the test deck;

The metal mesh grid supports the material, and the pallet can be rotated to facilitate the full combustion of the material;