Advantages and disadvantages of polyurethane cup pig pushing media
At present, the push medium used in the cleaning of polyurethane cup pigs is divided into gas and liquid. So, do you know what are the advantages and disadvantages of each of these two media? The following Yimite pipeline manufacturers talk about the advantages and disadvantages of the two large push media for polyurethane cup pigs. I hope everyone has to help. The specific disadvantages of the polyurethane cup pig pushing medium are as follows.
1. Gas medium.
The advantages of using a gaseous medium are that the source is convenient, inexhaustible, inexhaustible, and low in cost. It is only necessary to connect the air compressor to the launcher during the pigging operation and it can be used.
The shortcoming is that the sealing property is not good. Once the gas leaks from the gap between the polyurethane cup pig and the inner wall of the pipe, the back pressure is obviously reduced, and the polyurethane cup pig may be stagnant. In addition, the leaked gas medium does not have the dirt carrying dirt. Function, therefore, the scale is extremely easy to accumulate in front of the polyurethane cup pig. The polyurethane cup pig runs without water to make it smooth when pushing the medium. Under normal circumstances, when cleaning soft scale such as grease, dirt, etc., compressed air can be used as the propellant medium. When cleaning hard scale or scale is very thick, water should be selected as the propellant medium.
2. Liquid medium. The choice of liquid medium as the driving medium for pipeline cleaning is better, mainly in the following aspects:
(1) The compressibility of the liquid is small. After leaking a part of the gap between the polyurethane cup pig and the inner wall of the pipe, the pressure is only reduced and the sealing is good. The operation of the polyurethane cup pig is also relatively stable, and there will be no sudden and slow.
(2) The liquid leaking from the gap between the polyurethane cup pig and the inner wall of the pipe forms a high-speed liquid jet under the action of pressure, and peels off the dirt on the inner wall. That is, it has the function of assisting descaling.
(3) The effect of the liquid leaking from the gap between the polyurethane cup pig and the inner wall of the pipe on the cooling and lubrication of the pig. On the one hand, it reduces the running resistance of polyurethane cup pigs, on the other hand, it reduces the friction heat generation of polyurethane cup pigs and prolongs the service life of polyurethane cup pigs.
(4) During the forward running process, the leaked liquid can take away a part of the broken scale of the polyurethane cup pig in time, and reduce the movement resistance of the scale, so that the scale is not easy to accumulate in front of the pig, avoiding The occurrence of a blockage accident.
The above is about the advantages and disadvantages of the polyurethane cup push media. I hope that everyone can understand the advantages and disadvantages of the polyurethane cup push media, and it is helpful for everyone to choose the media.
