The sleeve compensator uses a new type of sealing material, flexible graphite ring, which has the characteristics of high strength, small friction coefficient (.~.), no aging, good effect, and easy maintenance. The sleeve compensator has a long service life and the fatigue life is equivalent to that of the pipeline. The sliding surface of the sleeve compensator has been specially treated and has good corrosion resistance in salt water, salt solution and other environments, which is more than times higher than that of austenitic stainless steel. At the same time, if the sealing effect of the sleeve type compensator/tubular expansion joint is weakened due to wear after many years, the flange can be tightened again to enhance the sealing performance, or the bolts of the tubular expansion joint can be loosened, the pressure ring can be removed, and the Install one or two layers of sealing rings, tighten the pressure ring, and continue to use it. Sleeve compensators are divided into one-way and two-way compensation structures. The two-way feature is that no matter which end the medium flows into the compensator. The sliding sleeves at both ends of the sleeve compensator always slide freely to achieve two-way compensation and increase the compensation amount. The requirements for sleeve compensators and their directly buried pipelines are:
The medium in the compensator should be treated to remove free oxygen and chloride ions, and the chloride ion content should not exceed.
b The compensator allows a system hydraulic test of no more than .times of the nominal pressure.
After the compensator is installed and before the system hydraulic pressure test is carried out, both ends of the pipe must be fixed to prevent the internal pressure from stretching the compensator.
When the insulation pipe is buried underground, it must be filled with sand with a particle size less than millimeters around it, and then covered with original soil. The thickness of the filled sand should not be less than millimeters.
The burial depth of the top of the thermal insulation pipe generally does not exceed .m, but try not to be less than .m. The thermal insulation pipe can be buried directly under various pipes.
It is not necessary to install the directly buried compensator tightly, nor do you need to follow the method of connecting the entire line of steel pipes and then cutting off the long pipes such as the expansion joints and then welding them. When using direct buried expansion joints, there is no need to install guide brackets.
sleeve compensator