Snickers Workwear 2021 1
EN ISO 11612 Protective clothing against heat and
flame. EN ISO 11612 specifies performance for clothing designed to protect from heat and/or flame (not including protection for firefighters and welders). The norm indicates protection against ignition from various heat sources: (A) limited flame spread, A1 surface ignition and A2 edge ignition, according to test method ISO15025; (B) convective heat and open flames, according to test method ISO9151; (C) radiant heat, according to test method ISO6942; (D) molten aluminum splash, according to test method ISO9185; (E) molten iron splash, according to test method ISO9185; and (F) contact heat (flat iron, hot plate etc.), according to test method ISO12127-1. Garments certified according to EN ISO 11612 should be used together with other protective clothing that meets the requirements of EN ISO 11612. Furthermore, the norm requires full protection of arms and legs, which means t-shirts and shorts do not meet the EN ISO 11612 requirements. However, the user can wear clothes certified according to EN 14116 (which does not have the same design requirements) underneath for enhanced protection. To ensure full protection, the head, neck, hands and feet must be covered with other approved protective clothing. Note that garments classified as underwear should always be worn together with outer garments that meet the protection requirements of EN ISO 11612. The underwear will not provide the right level of protection on their own. EN ISO 14116 Protective clothing against flame. EN ISO 14116 specifies the performance of protective clothing for workers exposed to occasional brief contact with open flames with no other thermal risks. This norm is a “lighter” version of EN ISO 11612 and is relevant for garments without full-length sleeves and legs as well as accessories such as hats, beanies, balaclavas, socks, underpants etc. EN ISO 14116 is available in three different indexes – 1, 2 and 3, where Index 3 stipulates the highest protection requirements. Materials classified as Index 1 must not be worn next to skin and garments that contain Index 1 materials should only be worn on top of Index 2 or 3 garments. IEC 61482-2 Clothing for protection from the thermal hazards of an electric arc. Despite all the measures in place a large number of electric arc accidents occur every year. IEC 61482-2 specifies requirements for clothing protecting against the thermal hazards of an electric arc. These clothes belong to the Risk III category, which defines garments used in high-risk environments, and which are certified to eliminate seconddegree burns in the event of an electric arc flash (flashover). In order to measure the product’s level of protection, the garment is subjected to two different test methods: an open arc test and a box test. The test methods use different test set-ups, arc configurations, test parameters, test procedures and result parameters. The results from the different methods of testing can be neither physically compared nor mathematically converted to those from the other form of testing. The arc rating has to be tested and assessed by either one or the other method. In a box test, the object is subjected to a directed arc flash of either 4kA (APC -Arc protection class - 1) or 7kA (APC 2). ATPV or EBT50 With the open arc method, the test result is given in calories – cal/cm2. The calorie value gives you an indication of how much heat/energy exposure you could withstand before you risk a 50% chance of getting a second degree burn. As well as a result in calories, an ATPV (Arc Thermal Performance Value) or EBT50 (Energy Break-open Threshold), when holes begin to form in the fabric) value is also specified. Neither value is better than the other. Basically, garments/fabrics that get an EBT50 value are typically more insulating than they are strong and ATPV garments/fabrics are usually stronger than they are insulating. ELIM – eliminate the risk of a second-degree burn Whereas the ATPV or EBT50 value gives an indication of what energy level you run a 50% risk of getting a seconddegree burn at, the incident energy limit (ELIM) defines the energy level at which you avoid the risk of a second-degree burn. Remember, however, that there is still a risk of getting a first-degree burn injury. The ELIM value is calculated from the average of the three highest incident energy data points without breakopen, shrink-open and which do not exceed the Stoll curve. The three incident energy data points are taken just below the mix zone in the test report. The Stoll curve determines the rating of the transfer of heat energy (calories) based on the time of transfer and the level of heat energy produced. NOTE! All garments worn must protect against electric arc! Including underwear, socks, gloves, underpants and t-shirts or shirts worn underneath the outer layer. And remember that the more layers of electric-arc-protective clothing you wear, the higher your protection. PPE 185