BS 12613:2021 pdf download – Plastics warning devices for underground cables and pipelines with visual characteristics The material shall be made of any thermoplastic material, e.g. polyethylene (PE) or polypropylene (PP).to which are added those additives necessary for manufacturing warning devices conforming to therequirements of this document. The use of own or external reprocessed materials or recycled materials shall be permitted formanufacturing warning devices conforming to the requirements of this document. The material, additives, colour masterbatches and inks for printing, if added, shall have no detrimentaleffect on the environment. Environmental, health and safety aspects, as well as the use of regulated substances [1] are to be takeninto account for the design process of the products. 5 Requirements 5.1 Colour The colour of the warning device shall be as agreed between the manufacturer and the purchaser.5.2 Appearance and colour fastness The appearance, colouring and marking of the warning device shall not exhibit any change when testedin accordance with 6.2.No discoloration or change of the initial colour shall be permitted. nly a changein surface appearance (e.g.gloss /matt) shall be permitted. For a given type of warning device (design, width), the colour fastness shall be tested for each colour.5.3 Dimensional characteristics 5.3.1 General The nominal width,Wo, of the warning device shall be as agreed between the manufacturer and thepurchaser. The dimensional characteristics of the warning device shall be measured by means of: a) a measuring tape/metal ruler, capable of measuring to an accuracy of 1,0 mm for the width of the warning device; b) a metal ruler, capable of measuring to an accuracy of 0,5 mm for the internal perimeter of the openings, if relevant; c)a calliper gauge, capable of measuring to an accuracy of 0,1 mm, for measuring the minimum width of the strands, if relevant. 5.3.2 Type 1 warning devices Each individual value of the width shall be equal or greater than 50 mm and the outside edges of thewarning device shall be straight and parallel. The deviation of each outside edge, towards outside or inside relatively to the mean line, shall be less orequal to 2 mm. 5.3.3 Type 2 warning devices The width of the Type 2 warning device shall conform to Table 1. The internal perimeter of an opening shall be ≤ 360 mm. The minimum width of the strands shall be: — ≥ 1 mm when the internal perimeter of the opening is < 160 mm; —...
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