Company News
Causes and preventive measures for damage of wire and cable in winter
Date: 2018-05-31 Source: Mingxin
Cold winter, many construction workers in the installation and installation of wire and cable will find, usually good quality wire and cable products, often appear some line body hard, insulated outer skin shedding damage and other phenomena, many construction personnel think that the wire and cable products themselves have quality problems, and cable manufacturers also insist on production. The product has been inspected at the time of leaving the factory, and it is a qualified product, which often leads to misunderstanding between the two sides.
In fact, it is not the quality of the product itself, but the cold winter. The outer skins of wire and cable products are usually plastic (PVC) or rubber. When they are in the environment below zero, they will harden. The whole wire and cable product line will be hard and brittle, causing the outer skin to be shedding and damaged in the case of slight external force. In winter, especially in the north, the outdoor temperature is usually below zero, and the surface temperature may be lower. So, if the wire and cable products are placed outside or directly on the surface, the phenomenon of the exfoliate of the product is likely to occur. So how can we prevent the phenomenon of shedding of wire and cable in winter? Take the following steps from each stage.
1, factory transportation: when the product is loaded onto the transport vehicle, it needs warm and protective measures. For example, the use of closed transport to prevent direct exposure of the product; to the product cushion a soft cushion, such as bedding or other soft foam; when loading light and light, do not rough loading, at the same time avoid the product bending too large.
2, When arriving at the destination or construction site, the product supplier is best placed to supervise personnel to prevent rough operation.
3, store: it is best to put the product in the room, and lay a layer of isolation layer on the surface of the storage, such as wood board, bedding, foam, etc. to prevent the product from freezing and dampness, and pay attention to prevent the product from directly touching the ground and scraping the wire and cable.
4, when the product is installed and installed, the best choice is to work in the case of warmer temperature in the afternoon, if conditions can be used before the use of the heater and other equipment to give the product "hot warm up", so that the product can reach the best performance. If buried, a protective layer can be laid in the cable trench, such as cloth and foam. If you wear the tube, you have to ensure that the inside and outside of the tube is smooth, so that the wire will not be scratched. Iron pipes should pay special attention to the selection of qualified iron pipes. There may be a lot of sharp starting points in the poor quality iron pipes, which will probably scratch the outer surface of the wires.
5, Select the low-temperature cable of Puguang brand, test strictly according to the national standard "GB/T2951.14-2008" test, place 16h under the environment of minus 35 degrees C, and then carry on the mechanical performance test, carry on the repeated bending bending, the test test on the elongation and tensile resistance to the insulation and the sheath, the pass rate is 100%, the pup light is low. The temperature cable has a very strong low temperature resistance. It can keep the insulation and sheath skin in the cold external environment to ensure no cracks and no breakage.
Cold winter, many construction workers in the installation and installation of wire and cable will find, usually good quality wire and cable products, often appear some line body hard, insulated outer skin shedding damage and other phenomena, many construction personnel think that the wire and cable products themselves have quality problems, and cable manufacturers also insist on production. The product has been inspected at the time of leaving the factory, and it is a qualified product, which often leads to misunderstanding between the two sides.
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