Juzhan technology is the first choice for the hott

Juzhan technology is the first choice for Hohhot PVC flame-retardant conduit brand.

Juzhan technology is the first choice for Hohhot PVC flame-retardant conduit brand.

second, KBG tube: its full name is "buckle thin-wall galvanized steel pipe". Third, the two kinds of tubes are made of the same material, but the connection methods are different:

jdg tube is that the sleeve and conduit are fastened with screws, and KBG tube is that the sleeve and conduit are compacted and fastened with special pliers. This kind of pipe material does not need corrosion prevention, bridging or painting. Its appearance is yellow, and the wall thickness is usually 1 5mm

kbg pipe products are scratched passively or actively on the surface, exposing its internal steel materials to a corrosive environment. If the coating is a non-metallic substance, the exposed steel base will soon be corroded, but galvanized products will sacrifice their protective properties, making the corrosion rate very slow

as the main processing machine, the recycled plastic granulator will have a large customer base

kbg is a buckle type galvanized thin-wall wire pipe, which is connected by pressing the pipe and pipe fittings out of the small pit with crimping pliers

IV. outdoor incoming line:

hot dip galvanized thick wall welded steel pipe or seamless steel pipe can be used. 5、 In the ceiling of buildings:

in dry places with normal environment, RC (water gas pipe - hot galvanized thick wall welded steel pipe), JDG, KBG, SC (thick wall welded steel pipe) or even TC pipe (wire pipe, thin wall pipe) can be used. Generally, PVC pipe (PC: flame retardant rigid plastic pipe) cannot be used; If you want to use PVC pipes in small buildings, you need to get the permission of the local competent department (the main problem is that toxic smoke will be produced in case of fire, and the possibility of permission exists only when PVC pipes are used in a small range in the ceiling of small buildings)

when the number of cables exceeds 24 holes, the pipe laying method should not be selected

4. The cable tunnel type shall be selected for the passage with a design clearance of 1.8m

5. The cable trench shall be of reinforced concrete type instead of brick type. In the area where the cover plate cannot be opened, other channel types should be selected. 1、 General provisions

1.5 zero (33 zero) kV cable lines, 6-circuit and above 220 kV cable lines should be tunnel type

2. The tunnel type should be adopted in the area where the incoming and outgoing lines and circuits of important substations are concentrated, the number of cables is 18 or more, or the tension of local power corridors

3. If the number of cables exceeds 24 holes, the pipe laying method should not be selected

6. Strictly control the application of Trenchless Directional cobalt Technology (pipe drawing). 1、 General provisions

1.5 zero (33 zero) kV cable lines, 6-circuit and above 220 kV cable lines should be tunnel type

2. The tunnel type should be adopted in the area where the incoming and outgoing lines and circuits of important substations are concentrated, the number of cables is 18 or more, or the tension of local power corridors

YJV cables need to be removed by fine polishing. The working temperature is up to 9 degrees Celsius, while VV is only 7 degrees Celsius. YJV cables with the same cross-sectional area have large ampacity

the maximum rated temperature of VV cable conductor is 7 degrees Celsius, and the maximum temperature during short circuit (duration less than 5 seconds) does not exceed Celsius. The preparation of samples should also avoid the impact function of 16 degrees Celsius due to work hardening or overheating

the maximum rated temperature of YJV cable conductor is 9 degrees Celsius, and the maximum temperature during short circuit (duration less than 5 seconds) does not exceed 25 degrees Celsius

yjv is better than VV in the long run (long service life, etc.), but more expensive than vv. From a river in the village, dead fish also began to emerge one after another. From the maximum allowable height of short circuit: YJV is 25 degrees Celsius, VV is 16 degrees Celsius, 14 degrees Celsius

Juzhan technology is the first choice for Hohhot PVC flame retardant conduit brands