Knowledge about pipeline limit expansion joint.

Limit expansion joint is to tighten and connect the bolt that comes with itself. This kind of expansion joint is convenient in construction, easy to install and designed, and now the construction is on the top of the house or roof, with the expansion joint, after the exterior wall coating, find a proper platform and put the expansion joint on the roof, which can do some waterproof and moisture-proof design. There are two principles for the construction site: it does not affect the normal construction order; the high water to glue ratio reduces the noise and makes the construction site environment quiet, and the number of cleaning times, drainage facilities and the amount of electricity consumption when solidifying are combined with the site, which can well clean the dust and mud on the surface of the material.
 
After the double flange limit expansion joint is procured back, first check whether there are any bad phenomena in the product, including weld slag, porosity, rubber ring cracks and other phenomena, because these may be the root of the problem of the product. After checking, all parts of the double flange expansion joint are cleaned, then it is moved to the pipeline, the flanges at both ends are opposite to the pipeline flange holes, rubber gaskets are lined, and then the holes are tightened with bolts diagonally in order to prevent local leakage caused by uneven installation.
 
Maintenance of pipeline limit expansion joint after burial is not as simple as open air. First, the whole pipeline system is closed, excavated and the damaged double flange expansion joint is replaced. This is not only laborious, but also affects the operation of the pipeline. Therefore, the first thing to do after the pipeline limit expansion joint is buried is to prevent corrosion. Before burial, there should be strict requirements for the planned trench. The trench should be planned in the shape of a slope to prevent water from accumulating in the installation part of the pipeline limit expansion joint. Secondly, anti-corrosion coating should be applied to the pipe limit expansion joint before installation. If possible, asphalt wool can be applied to cut the contact with air and moisture after the double flange expansion joint is buried and to ensure its stability.