Changzhou sewage pipes are blocked with airbags to stop leaks G

Blocking the air bag is also called water blocking. The sealing air bag is made of high-quality rubber and fiber reinforced layers after vulcanization. It has good anti-expansion strength, elasticity and flexibility, and can be used under various working conditions. It is simple to operate, has good aging resistance and has a long service life. Precautions for using the blocked air bag
If the temperature is too high (above degrees) or too low (below degrees), it will have a certain impact on the air bag. When the temperature is relatively high, the air bag The hardness of the rubber surface will decrease and become softer. At this time, inflate at the usual pressure. The air bag may become very large and thin, and the strength will be low and easy to burst. At this time, inflate at the usual pressure. When the temperature is too low, the rubber surface hardness of the air bag will increase and the air bag should be inflated slightly/about larger than usual. . When inflating an airbag with a flange, the flange must be aligned horizontally to avoid deflection and damage to the airbag. When using an airbag with a flange for sewage pipes, the water side of the airbag can be tied to a lifting ring with a rope no lower than the height to prevent the airbag from displacing in the pipeline because the main function of the airbag is sealing rather than pressure bearing. Therefore, when the pressure of sewage is very high, it must be pulled with ropes. When used in sewage pipes, the large thrust generated by sewage may cause the pressure inside the airbag to rise. This is why you need to pay attention to whether there is any change on the pressure gauge. When there is a continuous upward trend on the pressure gauge, you must unscrew the air stop valve and deflate to normal. pressure range to prevent the airbag from bursting. . When there are unknown chemicals and suspected flammable gases in the sewage pipes, first use an instrument to check the concentration. The concentration is within the safe value and is suitable for construction. When using an airbag, the airbag must be filled with nitrogen. Since the specific gravity of nitrogen is greater than that of air, it must be inflated according to the air pressure/in order to avoid blowing. When the airbag is exploded or filled with water, the pressure gauge should be replaced with a water pressure gauge due to the heavy specific gravity of water. The water filling pressure can be determined by yourself according to the actual situation on site. Ordinary airbags generally cannot be filled with water, and special water-filled airbags must be customized. . When used in pipelines for petroleum and corrosive liquids or gases containing chemical solvents, corresponding products must be customized and ordinary airbags must not be used in such pipelines. 2. Various models of airbags should be used according to the corresponding pipe diameters. Airbags that are only suitable for one pipe diameter cannot be used on other pipe diameters. Airbags that are suitable for multiple types of pipes must be used within the pipe diameter range of the instructions for use.
Characteristics of the sealing airbag
The sealing airbag is particularly suitable for maintenance tests such as water closure test, air closure test, leak detection, temporary water blocking for pipeline repair, etc. after sealing the drainage pipeline. Pipe blocking airbags are mainly used for blocking horizontal pipes (i.e. horizontal pipes). The characteristics of pipe blocking are that the oval-shaped pipe has a small contact area but is easy to be inserted into the pipe and has a general water blocking effect. , simple operation, light weight, small body size, economical and practical. , This air bag can be bent freely and has certain corrosion resistance. , Super expandability. Is there any change on the pressure gauge? When there is a continuous upward trend on the pressure gauge, the air check valve must be opened to deflate to the normal pressure range to avoid the airbag from exploding. . When there are unknown chemicals and suspected flammable gases in the sewage pipes, first use an instrument to check the concentration. The concentration is within the safe value and is suitable for construction. When using an airbag, the airbag must be filled with nitrogen. Since the specific gravity of nitrogen is greater than that of air, it must be inflated according to the air pressure/in order to avoid blowing. When the airbag is exploded or filled with water, the pressure gauge should be replaced with a water pressure gauge due to the heavy specific gravity of water. The water filling pressure can be determined by yourself according to the actual situation on site. Ordinary airbags generally cannot be filled with water, and special water-filled airbags must be customized. . When used in pipelines for petroleum and corrosive liquids or gases containing chemical solvents, corresponding products must be customized and ordinary airbags must not be used in such pipelines. 2. Various models of airbags should be used according to the corresponding pipe diameters. Airbags that are only suitable for one pipe diameter cannot be used on other pipe diameters. Airbags that are suitable for multiple types of pipes must be used within the pipe diameter range of the instructions for use.