PPE

Quality inspection of safety net

(1) Safety net is a kind of special labor protection articles involving national property and personal safety. 1ts product quality must pass the inspection by the supervision and inspection department designated by the state and obtain the production license before it can be produced. Every batch of safety net must have the inspection report from the supervision and inspection department. Each safety net shall be attached with inspection certificate of national supervision department and self inspection certificate of enterprise at different positions. At the same time, there should be a label, which should have a permanent mark. The content of the label should include: name of the manufacturer, manufacturing date, batch number, material, specification, weight and production license number< (2) safety net is divided into horizontal net (P), vertical net (L) and dense mesh safety net (ML). Safety net is mainly composed of side rope, tie rope, reinforcement rope and net rope. The dense mesh safety net is composed of net body, buckle, side rope and additional tether. The physical and mechanical performance of safety net is the main index to judge the quality of safety net. 1ts contents include: breaking strength of side rope, tether, net rope and tendon rope. Dense mesh safety net mainly includes: breaking strength, breaking elongation, tensile strength of joint, tearing strength, penetration resistance, retention rate of breaking strength after aging, strength and flame retardancy of eye opening buckle. Both horizontal and vertical nets shall have impact resistance. The vertical net can not replace the horizontal net. 1t should be distinguished between the horizontal net and the vertical net according to the construction needs and the load height. The load strength of the flat net is greater than that of the vertical net, the material used is more, and the weight is greater than that of the vertical net. 1n general, the horizontal network is more than 5.5kg, and the vertical network is more tha2.5kg (3) safety net is mainly used in open-air workplaces. Therefore, it must be weather resistant. Weather resistant materials mainly include nylon, vinylon and polyester. The material used for the same net should be the same, the wet dry strength ratio should be greater than 75%, and the total weight of each net should not exceed 15kg. The continuous burning and smoldering time of flame retardant safety net shall not exceed 4S (4) the width of horizontal net is not less than 3m, and the width of vertical net and dense mesh safety net is not less than 1.2m. The tether length shall not be less than 0.8m. The distance between safety net tether and tether shall not be greater than 0.75m. The distance between ropes of dense mesh safety net shall not be greater than 0.45M, and the distance between reinforcing ropes of safety net shall not be too small, generally more than 0.3m. Safety net can be divided into manual knitting and mechanical knitting. Mechanical knitting can be divided into knot knitting and non knot knitting. 1n general, the intensity of nodule without reticulum is higher than that of nodule with reticulum. The net knot and node head must be fixed firmly and not be moved to avoid mesh enlargement and uneven side length. The occurrence of the above situation will lead to stress concentration until the net rope breaks copyright notice: This article is reproduced from the network media, only represents the author’s point of view, and has nothing to do with this website. 1f the information column articles and comments violate your legal rights, please call to let us know and we will deal with them in time

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