Introduction:
Textiles Damaged 45 ° Area The experimental device is manufactured in accordance with the most recent version of the national standard GB/T14645 design and production; it applies to textile fabric in under 45 ° combustion and measures damage length and area for the purpose of exposing the flame length. Combustion evaluation of fire-resistant refractory materials can be based on standard implementation compliance, sample measurement installed at a 45-degree angle, and flawless combustion combustion characteristics. Graphic placement sample experienced some radiation, 45 degree flammability tests to measure burning time and passive smoke glow time, and fixed heat created in the Chamber.
Standard:
ASTM D 1230
Procedure
1. Adjust the position of the rack of the flammability tester (Fig. 1) with a holder and trial specimen (not a prepared specimen) in position, so that the tip of the indicator touches the face of the specimen. Place the specimen holder in the chamber so that the longest frame is on top. Adjust the burner and sample holder so that, with the indicator touching the face of the specimen, the flame is applied to the vertical center of the specimen, 19 6 0.2 mm ( ⁄ 4 6 0.019 in.) from the bottom of the specimen and with the burner face 8 6 0.2 mm ( ⁄ 16 6 0.019 in.) from the face of the specimen.
2. Open the control valve of the fuel supply and allow approximately 5 min for the air to be driven from the fuel line. Ignite the gas and adjust the flame to a length of 16 mm( ⁄ 8 in.) measured from its tip to the opening in the gas nozzle.
1) Verify the accuracy of the timing mechanism for the flame impingement of 1 6 0.1 s without a test specimen in place, using an instrument capable of timing within 0.05 s.
3. Remove a mounted specimen from the desiccator and place it in position on the rack in the chamber of the apparatus. Place the stop cord 9.5 60.2 mm ( ⁄ 8 60.019 in.)
above and parallel to the lower surface of the top plate of the specimen holder. Hook the stop weight in place close to and just below the stop weight thread guide. Expose the test specimen to the flame within 45 s of the time it was removed from the desiccator.
NOTE 6—This configuration can be achieved easily and reproducibly with the use of L-shaped guides on the specimen holder and an additional thread guide popularly referred to as a “sky hook.” The essential condition, however, is the uniform height of three-eighths of an inch for the stop cord and not the number, placement, or design of the thread guides.
4. Close the door of the apparatus. Set the timer at zero. Conduct the test in a draft-free enclosure with the apparatus at room temperature.
5. Activate the starting lever or button. This starts the timing mechanism and applies the flame to the specimen for a period of 1 s. Timing is automatic, starting upon application of the flame and ending when the weight is released by the burning of the stop cord.
6. Record the time of flame spread for each specimen, and note whether the base of each specimen having a raised fiber surface is ignited, charred, melted, or fused to a point where the damage is apparent on the reverse side of the specimen.
NFPA 702
CA TB 117 (2000)
Feature:
Structure parts:
1. The test box has been painted and is attractive and corrosion-resistant.
2. Easy to see internal test status through a heat-resistant glass window.
3. Stainless steel is used for the internal tooling materials.
4. The start and power switches.
5. There are six air vents on the box's side and the tank top.
6. Conduct various tests to swap out the sample holder.
7. When carrying out various experiments, the sample holder needs to be changed.
8. A flow control valve supplied from Japan allows for exact control of the flame height.
9. Gauge and pressure regulator valve of imported brands.
Damaged area of the test section:
1. Set the flame height on the needle valve to 45 2m.
2. The counter displays the glow time with a resolution of 0.1s.
3. Glow time: A counter that displays total combustion time with a 0.1-second resolution.
4. The predetermined time of sample lighting is the flame spread time (flame spread time).
5. The counter reset switch is set to "0."
6. Accuracy and temperature display range: 0 to 90 degrees Celsius.
7. Gas pressure can be displayed; imported brands gauge and pressure regulator.
8. Switches that completely halt combustion
9. Planimeter is not required.
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