National Fire Protection Association standard NFPA 2112 test method for flame retardant protective clothing
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NFPA2112 flame retardant protective clothing fire retardant clothing flame retardant clothing
NFPA 2112 is the standard for industrial flame-retardant protective clothing and is the test basis for the establishment of future laws and regulations on industrial flame-retardant protective clothing. It comprehensively elaborates on the thermal protection performance requirements ofFlame-retardant protective clothingfor industrial use, including a series of thermal protection performance tests.
(1) Vertical combustion performance test. Expose the material to a standard flame for 12 s. After the flame is removed, determine whether it will be ignited and the length of the burning damage, etc.
(2) Thermal radiation and thermal convection mixed effect protective performance test, referred to as TPP method. This method is tested by placing a 6-inch square piece of cloth under a convection and radiant heat source with a total energy density of 2 cal/(cm2·s), and then recording the time required to achieve second-degree burns. The TPP value is the time multiplied by Take the value of cal/cal/(cm2·s). The higher the TPP value, the greater the protection provided by the fabric.
Different from the vertical burning test, the TPP test can tell us how much energy must be absorbed by simulated human skin to achieve second-degree burns through various different fabrics. That is to say, the higher the TPP value, the better the fabric protects the body when exposed to high temperatures and high-heat flames. The unit TPP value is a more direct reflection of the thermal protection performance.
(3) Thermal human body model test. The test was to put a 6-inch-tall mannequin containing 122 temperature testers on the body into a flame-retardant protective suit and expose it to 2 cal/cm2 from a 12-propane flamethrower. •s heat source, the computer simulates the degree and location of second- and third-degree burns that human skin may suffer based on data collected from 122 temperature testers. This is the most advanced life-size thermal burn assessment system in the world today. In order to further simulate the extent of human burns in actual flames, it is used to test the degree of protection that the entire set of clothing can provide under simulated actual flame conditions. This test allows us to predict the degree of second or third degree burns the body is likely to have, and the lower the degree of burns throughout the body, the greater the chance of survival.
(4) Thermal stability test. This test is used to determine the thermal stability of a material. It requires the material to be placed in a high-temperature oven at 500 °F for 5 minutes, where the shrinkage cannot exceed 15%, and then other heat is determined based on whether the material will ignite, melt, drip, or decompose. Protective properties.
The Flame-retardant protective clothing produced by City Textile can meet the NPFA2112 standard of the United States and the European Union’s EN11611, EN11612 and many other international standards. .
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