Flame retardant clothing standards

American standard
NFPA 1971 is a full set of equipment standards for firefighters in building firefighting and provides minimum requirements for firefighters to dress in building fires, including clothing design, safety features, as well as clothing components and ancillary items (tops, pants, helmets, gloves, footwear) Comprehensive testing. Among them, the thermal protection test (TPP method) is through the heat source through the fabric and other materials to reach the human body surface, resulting in secondary burns the required thermal energy, thus assessing the fabric thermal protection performance. The method of operation is: placing a heat source on one side of the sample to be tested, placing a heat meter on the other side, an active heat insulation plate between the heat source and the sample to be tested, usually blocking the heat source and the test sample by the heat insulation plate, Open, the test sample is exposed to the heat source, by measuring the calorimeter thermal energy changes over time to measure the heat flux of the sample, and record the time required to reach the second degree burn to measure the thermal protection index of the sample TPP value.
NFPA 1975 for the fire and emergency protective clothing testing standards commonly used in industrial flame retardant protective clothing to determine the flame retardant properties. Protective clothing fabric flame retardant vertical burning test method. In addition, the 500 ° F oven test method 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, where the shrinkage can not exceed 15% and then depending on whether the material ignites, melts, drips Or decomposition to determine other thermal protection performance.
NFPA 2112 flame retardant protective clothing for industrial standards, is the future of industrial flame-retardant protective clothing laws and regulations established test basis. It comprehensively describes the thermal protection performance requirements of industrial flame-retardant protective clothing, including a series of thermal protection performance tests. (1) vertical burning performance test. The material is exposed to the standard flame 12 s, the flame removed, to determine whether it will be ignited and burn the length of damage. (2) Heat radiation and heat convection mixed role Protective performance test, referred to as TPP method. The test method is to place a 6-inch square cloth under thermal convection and radiant heat with a total energy density of 2 cal / (cm2 · s), and then record the time required to reach the second-degree burn. The TPP value is time multiplied The value of cal / cal / (cm2 · s). The higher the TPP value, the stronger the protection provided by the fabric. Unlike the vertical burn test, the TPP test tells us how much the energy absorbed by the human skin through a variety of different fabrics to reach the secondary burns, that is, the higher the TPP value, the more the fabric exposed to heat and heat The body's protection is better, the unit TPP value is the most direct manifestation of thermal protection performance. (3) Thermal mannequin test. The test was performed on a 6 inch body mannequin containing 122 temperature testers and exposed to a heat of 2 cal / cm2 · s assembled by a 12 propane flamethrower, A temperature tester to collect data, to simulate the human skin may be the second and third degree burn and parts. This is the most advanced thermal burn assessment system in the world today with the same size as a real person. In order to further simulate the degree of burn in the body of an actual fire, it is used to test the degree of protection the entire suit can provide under simulated actual fire conditions. Through this test, we can predict the body may reach the secondary or tertiary burns, the lower the degree of systemic burns, the greater the chance of survival. (4) The thermal stability test is basically the same as the 500 ° F oven test in the NFPA 1975 standard.
EU standards
EN 531 is the EU industrial thermal protective clothing standard. This standard specifies the overall performance of fire-retardant protective clothing, structural design, dimensional stability, flame spread, heat and melt metal properties, size marks and marks, user information, identification patterns and other provisions. Flame retardancy test method using EN 532. EN 532 is a test method for limiting the rate of flame diffusion. The test method is to ignite 10 s on the surface of a vertically-placed material and the criteria are as follows: (1) No burns shall be allowed on any specimen to the edges of the fabric or to the upper end of the fabric; (2) (3) Any specimen shall not have a burning drop or a melt shall fall; (4) The duration of burning shall be less than or equal to 2 s; (5) The duration of smoldering shall be less than or equal to 2 s.
EN 470 welder and similar work in the EU hot protective clothing standards, provides flame retardant protective clothing design requirements, material requirements, safety requirements, size marks and marks, user information, identify the pattern. According to the prescribed method of washing or drying the sample, follow the method of EN 532 test method for fabric burn spread performance test. In addition, the effect of falling metal droplets is evaluated in accordance with EN 348. After washing or drying the test sample, if the average drop of the 10 test samples drops between 15 and 15.5 drops, then a second test of 10 test samples shall be conducted. The test shall be based on 20 test samples The average data shall prevail.
EN 469 is the EU standard for fire protection clothing. The main consideration is the protection of heat and flame in large fires, excluding special tasks such as spill chemicals, forest fires, close fire fighting, road accident rescue or special fire protection costumes. The standard includes general requirements for protective clothing, important safety requirements, additional requirements, marking marks, user information and identification patterns. In addition to fire resistance, the outer fabric must also have certain physical properties to suit external environmental conditions such as thermal stress. These basic safety features include residual strength, heat resistance, tensile strength, tear strength, surface wettability and dimensional changes. The standard requires that the outer skin be exposed to a heat source with a daily flow rate of 10 kW / m2 and that the residual strength, ie, tensile strength and tear strength, of the outer skin fabric must be greater than 450 N and 25 N, respectively. In addition, the standard also stipulates that any fabric used in fire protective clothing must pass the heat resistance test. The test method is to place the specimen in a thermostatic chamber at 260 ° F. The test specimen shall not melt, drip or ignite and the shrinkage shall be less than or equal to 5%.
Australian standard
AS 4824-2001 is Australian (Transitional) firefighter protective clothing standard. This standard specifies the design requirements, sampling methods and pretreatment methods, thermal protection performance requirements, mechanical performance requirements, ergonomics and comfort requirements, general requirements, manufacturer's information and marking marks for field and fire-fighter firefighters. Among them, the testing methods required for thermal protection performance are tested in a similar way to EN 532.
Chinese standard
GB 8965-98 for China's national standard flame retardant clothing. This standard applies to industrial furnaces, metal thermal processing, welding, chemical, petroleum and other places, engaged in an open flame or sparks or in the vicinity of the molten metal at the operation, and in flammable substances and have a fire hazard when worn by the workplace Flame retardant protective clothing. The standard with reference to the 1988 standard of the same name and international standards similar to the promulgation of industrial flame retardant clothing standards and made the following details: the overall performance of flame retardant clothing, fabrics and suture flame retardant properties, flame retardant protective clothing The mechanical properties, structural design, manufacturing, product labeling and packaging and transportation, testing methods. Flame retardant properties of which test methods used fabric GB / T 5455, the test method is similar to EN 532 that is placed in the vertical surface of the material ignition 10s, and then test parameters continued burning time, smoldering time and the length of the damage will be divided into Three levels. After the fire-retardant finishing fabric, up to two were qualified, a person who is excellent. After 50 times the test fabric washing, not less than three, in the test found that the product has a melting shrinkage of nonconforming product.
Xinxiang City Yulong Textile Co., Ltd. was established in 2002, over the years focused on the production of flame retardant, fluorescent-oriented variety of functional fabrics and security clothing. The company has afunctional fabric factory and protective clothing factory, as the domestic functional textile industry leader, Yu Long textile more groundbreaking integration of its fabric and clothing two factories of the advantages of resources, effort to build functional fabrics and clothing Station service center.