In the severe cold winter, when laying and installing wires and cables, many construction workers will find that wire and cable products with good quality usually have some hardening of the wire body, peeling and damage of the insulation coating, etc. Many construction workers think it is the wire and cable product itself. There are quality problems, and the cable manufacturers insist that the products have been inspected before leaving the factory and are qualified products, which often leads to misunderstandings between the two parties.
Actually, it's not because of the quality of the product itself, but because of the severe cold in winter. The outer skins of wire and cable products are mostly ordinary plastic (PVC) or rubber. When they are in a sub-zero environment, they will become hard, and the entire wire and cable product line will become hard and brittle, resulting in a slight external force. Falling off and damage will occur. In winter, especially in northern regions, the outdoor temperature is often below zero, and the surface temperature may be lower. Therefore, if the wire and cable products are placed outdoors or directly on the ground, the skin of the product may fall off. So, how do we prevent the phenomenon of wire and cable sheath falling off in winter? Take the following measures from each stage -
|
1. Delivery before delivery: When the product is loaded on the transportation tool, it needs to keep warm and protect it. For example, use enclosed means of transportation to prevent the product from being directly exposed; padded the product with a layer of soft cushion, such as bedding or other soft foam, etc.; handle with care when loading, do not rough load, and avoid bending the product Big.
2. When arriving at the destination or construction site, it is best for the product supplier to send personnel to supervise it to prevent rough operations during product unloading.
3. Storage: It is best to store the product indoors, while laying an isolation layer on the storage surface, such as wood, bedding, foam, etc., to prevent the product from freezing and damp, and to prevent direct contact between the product and the ground. If the cable sheath is scratched, handle it with care.
4. When the product is laid and installed: It is best to choose to work in a warmer temperature in the afternoon and afternoon. If possible, you can use a heater or other equipment to "warm up" the product in advance before use, so that the product can reach the best performance state. If it is buried in the ground, a protective layer such as cloth or foam can be laid in the cable trench in advance. If you are wearing a pipe, you must ensure that the inside and outside of the pipe are smooth in advance so that the wires will not be scratched. Special attention should be paid to iron pipes. When purchasing qualified iron pipes, there may be a large number of sharp raised points in the low-quality iron pipes, which may scratch the outer skin of the wires.
5. Choose Puguang brand low-temperature cables and test them in strict accordance with the test requirements of the national standard "GB/T2951.14-2008". Place them in an environment of minus 35°C for 16 hours, then conduct mechanical performance tests, and perform repeated bending and flexing. , Conduct elongation and tensile test tests on insulation and sheath, with a pass rate of 100%. Puguang low-temperature cables have strong low-temperature resistance, and the insulation and sheath skin can still be guaranteed in a cold external environment. No cracks, no fracture state.
In the severe cold winter, when laying and installing wires and cables, many construction workers will find that wire and cable products with good quality usually have some hardening of the wire body, peeling and damage of the insulation coating, etc. Many construction workers think it is the wire and cable product itself. There are quality problems, and the cable manufacturers insist that the products have been inspected before leaving the factory and are qualified products, which often leads to misunderstandings between the two parties.
Actually, it's not because of the quality of the product itself, but because of the severe cold in winter. The outer skins of wire and cable products are mostly ordinary plastic (PVC) or rubber. When they are in a sub-zero environment, they will become hard, and the entire wire and cable product line will become hard and brittle, resulting in a slight external force. Falling off and damage will occur. In winter, especially in northern regions, the outdoor temperature is often below zero, and the surface temperature may be lower. Therefore, if the wire and cable products are placed outdoors or directly on the ground, the skin of the product may fall off. So, how do we prevent the phenomenon of wire and cable sheath falling off in winter? Take the following measures from each stage -
1. Delivery before delivery: When the product is loaded on the transportation tool, it needs to keep warm and protect it. For example, use enclosed means of transportation to prevent the product from being directly exposed; padded the product with a layer of soft cushion, such as bedding or other soft foam, etc.; handle with care when loading, do not rough load, and avoid bending the product Big.
2. When arriving at the destination or construction site, it is best for the product supplier to send personnel to supervise it to prevent rough operations during product unloading.
3. Storage: It is best to store the product indoors, while laying an isolation layer on the storage surface, such as wood, bedding, foam, etc., to prevent the product from freezing and damp, and to prevent direct contact between the product and the ground. If the cable sheath is scratched, handle it with care.
4. When the product is laid and installed: It is best to choose to work in a warmer temperature in the afternoon and afternoon. If possible, you can use a heater or other equipment to "warm up" the product in advance before use, so that the product can reach the best performance state. If it is buried in the ground, a protective layer such as cloth or foam can be laid in the cable trench in advance. If you are wearing a pipe, you must ensure that the inside and outside of the pipe are smooth in advance so that the wires will not be scratched. Special attention should be paid to iron pipes. When purchasing qualified iron pipes, there may be a large number of sharp raised points in the low-quality iron pipes, which may scratch the outer skin of the wires.
To make a long story short, in winter, wires and cables will become very fragile and we need "care".
