Building Materials Non-combustibility Tester

Building materials non-combustibility tester is designed to test the combustibility of main components in homogeneous and nonhomogeneous building products under specific conditions. This instrument belongs to the grading testing equipment of building combustion performance. The tester in the furnace temperature (750 + 5 )℃, uses modular temperature controller to measure precise test results, and then decides the grade of the sample according to the grade A (homogeneous materials) specified in “GB/T 8624-2012 Classification of  combustion performance of building materials and products”.

Application

The building materials non-combustibility test furnace is developed in accordance with the technical specifications and requirements stipulated in the national standard GB/T5464-2010. It is suitable for testing methods used to evaluate the combustion performance of building materials under specified laboratory conditions. It is applicable to testing the combustion performance classification of fire-resistant materials according to the GB8624 combustion performance classification of building materials.

Standards

ISO 1182: building products --- in combustible fire reaction test

BS 476-4:Fire tests on building materials and structures - Part 4: Non-combustibility test for materials

BS 476-11:Fire tests on building materials and structures - Part 11: Method for assessment of the fire hazard of building products based upon the results of tests for ignitability, flame spread, heat release and smoke production

ASTM E 136: Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C

Technical Parameters

1. Probe test points: test chamber, test center, specimen surface, furnace wall

2. Heating power: 1200W

3. Temperature range: (- 200 ~ 1300) ℃

4. Temperature control range: (300 ~ 750) ℃

5. Temperature measurement accuracy: ± 1 ℃

6. Temperature control accuracy: ± 3 ℃

7. The initial furnace equilibrium temperature: (750 ± 5) ℃,  temperature drift in 10 minutes ≤ 2 ℃. The relative average temperature in the maximum deviation of 10min can not exceed 10 ℃.

8. Furnace temperature stabilizing time: stabilizing time from room temperature to 750 ℃ ≤1 hour.

9. Heating furnace tube size: diameter (75 ± 1) mm, height (150 ± 1) mm;

10. The sample is cylindrical: diameter 45mm, height (50 ± 3) mm;

11. Temperature probe: diameter 1.5mm, wire diameter 0.3mm, nickel chromium - nickel silicon armored thermocouple;

12. Power adjustment: 0 ~ 1200 W adjustable;

13. Condition adjustment: Before the test, the sample must be adjusted in a ventilated oven at a temperature (60 ± 5 ° C)  for (20 to 24) h, and the sample is then allowed to cool down to room temperature in a dry dish. Before the test, the quality of each sample should be weighed , accurate to 0.01g.

14. Power supply voltage: AC220V 50Hz;

Features

1. Heating furnace shell, holder, air hood and test stand are made of stainless steel, beautiful shape, smooth lines, corrosion resistant, anti-aging, durable.

2. Electrical box shell uses spray method, namely the electrostatic powder coating method, making the chamber appearance of excellent quality, strong mechanical strength, anti-corrosion, no rust.

3. Electric spiral lifter. In the process of the test, one operator is enough, greatly saving manpower and time. The integrated design of holder and heating furnace increases the stability of the lift rod. The test piece is put into the furnace with an accurate position.

4. The heating furnace is equipped with refractory tube of electric heating coil, with insulation layer on the outer cover, so that the outer wall will not  appear high temperature phenomenon during the test process due to the temperature rise of the furnace, increasing equipment safety performance.

5. The test equipment is designed with a 80mm × 120mm gate in the bottom of the blocking  flow screen. The residual sample drops to the bottom of the device can be directly removed from the gate to facilitate the calculation of the quality loss of the specimen.

6. An observation mirror is set in the front top of the tester, convenient for quick observation of the progress of the sample inside the furnace.

7. There are many kinds of upper machine choices for test equipment. One is the computer control interface, and the other is the man-machine touch screen interface. The user can choose to use as needed.

Accessoriess

Complete set includes:

01. European standard indoor furnishings flammability testing kit

02. No. 4 wooden spacers (10 pieces/pack)

03. No. 5 wooden spacers (10 pieces/pack)

04. No. 6 wooden spacers (10 pieces/pack)

05. No. 7 wooden spacers (10 pieces/pack)

06. Non-flame retardant polyurethane foam 450×450

07. Non-flame retardant polyurethane foam 450×300

08. Non-flame retardant polyurethane foam 450×150

09. Flame retardant polyurethane foam 450×450

10. Flame retardant polyurethane foam 450×300

11. Flame retardant polyurethane foam 450×150

12. Flame retardant polyurethane foam 450×450

13. Flame retardant polyurethane foam 450×300

14. Flame retardant polyurethane foam 450×150

15. Standard cigarettes (10 packs)

Test Procedures

1. So that the furnace temperature equilibrium, if the logger can not be calculated in real time, the final temperature should be checked whether the balance.

2. Before the test should ensure that the entire device is in good working condition, such as a steady flow clean air flow, the device can be smoothly inserted into the slide, the sample holder can be accurately located in a predetermined position in the furnace.

3. Prepared according to a predetermined and regulated by the state of the sample into the sample holder, the sample racks suspended from the support member. The sample holder into a predetermined position in the furnace, the operation time should not exceed 5s. When the sample is located in a predetermined position in the furnace, immediately start the timer. Recorded during the test furnace thermocouple temperature measurement, such as the requirement to measure the surface temperature of the sample and the center temperature, corresponding to the temperature it should also be recorded.

4. Carried 30min test, if the furnace temperature reaches the final equilibrium temperature in 30min, that is measured by a thermocouple temperature drift (linear regression) within 10min of not more than 2 ℃, you can stop the test. If unable to reach equilibrium within 30min, the test should be continued, while every 5min check whether the final temperature equilibrium, when the furnace temperature reaches a final equilibrium temperature or testing time reaches 60min end of the trial should be. Recording duration of the test, the sample holder and then remove from the heating furnace, the end of the time trial for the end time of the last 5min or 60min. Temperature should be checked after the end of the test record if the logger can not be recorded in real time, test. If it can not meet the above requirements, it should be re-tested. If an additional test using a thermocouple, the thermocouple should all have reached the final temperature equilibrium or when the test time was 60min when the end of the trial.

5. The collection and after the test specimen cracked or falling all carbides, ash and other debris, together with the sample into the drying vessel was cooled to ambient temperature, weigh the residual mass of the sample. The quality of each sample were recorded before and after the test and observing the combustion behavior recorded during the test specimen. Sustained fire occurrence and duration records, accurate to the second. Sample shows a continuing 5s or longer continuous flame on the surface it should be regarded as sustained fire.

6. The following furnace thermocouple to measure the temperature, in degrees Celsius, the initial furnace temperature T1. average temperature last 10min predetermined temperature balance of the furnace; furnace maximum temperature Tm, the maximum temperature throughout the test discrete value; the final furnace temperature Tf ,. The temperature during the test last 1min average.

Fourth, the end of the trial, finishing the test furnace wipe clean for the next use.