NFPA 2112 test method for flame resistant protective clothing

NFPA 2112 is the standard for industrial flame resistant protective clothing and is the test basis for the establishment of future laws and regulations for industrial flame resistant protective clothing. It is a comprehensive statement of the thermal protection performance requirements for industrial flame resistant protective clothing, including a series of thermal protection performance tests.

(1) Vertical burning performance test. The material is exposed to a standard flame for 12 s. After the flame is removed, it is determined whether it will be ignited and the length of burn damage, etc.

(2) Thermal radiation and thermal convection mixed action protection performance test, referred to as the TPP method. The method test is a 6 square inches of fabric placed in the total energy density of 2 cal / (cm2 - s) of heat convection and radiation heat source, and then record the time required to reach the second level of burn, TPP value that is the time multiplied by cal / cal / (cm2 - s) value. the higher the TPP value, the fabric provides The higher the TPP value, the stronger the protection provided by the fabric.

And vertical burning test is different, TPP test can tell us to simulate the human skin through a variety of different fabrics to reach the second level of burns must absorb the amount of energy, that is, the higher the TPP value, the fabric for exposure to high temperature and high heat flame body protection is better, the unit TPP value is a more direct reflection of thermal protection performance.

(3) Thermal manikin test. The test is to let the whole body contains 122 temperature testers 6 inches high mannequin wearing flame retardant protective clothing, and make it exposed to 12 propane flamethrower collection into the 2 cal/cm2-s heat source, the computer according to the data collected from the 122 temperature testers, simulate the human skin may be subjected to secondary and tertiary burns degree and parts. This is one of the more advanced life-size thermal burn assessment systems in the world today. In order to further simulate the degree of burns on the human body in actual flames, it is used to test the degree of protection that the entire suit can provide under simulated actual flame conditions. This test allows us to predict the degree of second or third degree burns that the body may achieve, and the lower the degree of whole body burns, the greater the chance of survival.

(4) Thermal stability test. This test is used to determine the thermal stability of the material, requiring the material to be placed in a 500 °F high temperature oven for 5 min, in which the shrinkage rate can not exceed 15 %, and then based on whether the material will ignite, melt, drip or decompose to determine other thermal protection properties.

City textile production of flame retardant protective clothing can meet the U.S. NPFA2112 standard and the European Union's EN11611, EN11612 and many other international standards.