BS EN 60903 pdf free download

BS EN 60903 pdf free download. Live working — Gloves of insulating material.
5 General requirements 5.1 Physical requirements 5.1 .1 Composition All gloves may be lined or unlined, have an exterior covering, or not, for protection against chemical attack, or be specially compounded to reduce the effects of ozone. Insulating gloves for electrical protection are usually made of elastomer. Composite gloves are usually made of elastomer or plastic. In case of excessive wear or damage on the exterior of a composite glove made up of layers of different colours, the different colour layer underneath will appear. 5.1 .2 Shape The gloves shall be provided with a cuff. Gloves may be manufactured with or without cuff roll. NOTE The shape of a glove is indicated in Figure 1 a. The letter “h” in Figure 1 a represents the curve of the finger in curved gloves. The shape of a mitt is indicated in Figure 2. The shape of a long composite glove is indicated in Figure 1 b. The shape of a bell cuff glove is illustrated in Figure 1 c. 5.1.3 Dimensions Table 2 gives the standard lengths of gloves. For contour-cuff gloves, the difference between the maximum and minimum lengths (see Figure 3) shall be 50 mm ± 6 mm except for long composite gloves where this difference shall be 1 00 mm ± 1 2 mm. It is not practicable to specify other dimensions, but typical glove dimensions are suggested in Annex F. 5.1.4 Thickness The minimum thickness shall be determined only by the ability to pass the dielectric tests defined in 5.3. The maximum thickness on the flat surface of a glove (no ribbed area if present) shall be as given in Table 3 in order to obtain the appropriate flexibility. 5.1 .5 Workmanship and finish Gloves shall be free on both inner and outer surfaces from harmful physical irregularities that can be detected by thorough test and inspection. Harmful physical irregularities shall be defined as any feature that disrupts the uniform, smooth surface contour, such as pinholes, cracks, blisters, cuts, conductive embedded foreign matter, creases, pinch marks, voids (entrapped air), prominent ripples and prominent mould marks. The working area is defined as all finger and thumb forks, the palm and the palm side of the fingers and thumb (see Figure 4). Palm and finger surfaces designed to improve the grip shall not be considered as irregularities. 5.2 Mechanical requirements These requirements are applicable to the basic glove or sample material taken from the finished glove. 5.2.1 Tensile strength and elongation at break The average tensile strength shall not be less than 1 6 MPa (see 8.3.1 ). The average elongation at break shall not be less than 600 % (see 8.3.1 ). 5.2.2 Tension set The tension set shall not exceed 1 5 % (see 8.3.3). 5.4 Ageing requirements Test pieces shall be submitted to high temperature tests (see 8.5) to simulate the effects of ageing. For dumb-bell test pieces, the lowest value of tensile strength at break shall be a value of not less than 80 % of the unaged value. The tension set shall not exceed 1 5 %. Each glove shall also pass the dielectric proof test, but without being subjected to the moisture conditioning. 5.5 Thermal requirements 5.5.1 Low temperature resistance No tear, break or crack shall be visible on the gloves, after being subjected to a low temperature test (see 8.6.1 ). Each glove shall also pass the dielectric proof test, but without being subjected to moisture conditioning.BS EN 60903 pdf download.