The double-flange dismantling joint is a loose-sleeve limit dismantling joint developed on the basis of a flange-type dismantling joint. Compared with a general dismantling joint, the loose-sleeve limit dismantling joint has a large compensation amount.

After exceeding the allowable range of the equipment, the limit device will function to limit the casing part of the expansion joint to the body part, and will not continue to compensate for the displacement. This prevents the casing from being pulled out of the body.

Flange limit expansion joints have the characteristics of adjusting the installation gap. Compared with ordinary dismantling joint, they have more powerful protection for pipes and valves, and will not cause water leakage during operation. Therefore, double flange limit dismantling joint are the necessary accessories for pipelines with valves, it is more convenient to disassemble and hoist the  dismantling joint when the valve is repaired. Henan Shunying double-flange dismantling joint are mainly used in large-scale power engineering pipelines, pipelines with valves and pumps, and other pipelines that require compensation.

The expansion joint of the sewage pipe is relatively large, and the service life is also very long. This is very convenient during the disassembly and assembly of the valve, and the entire pipeline is also very convenient for maintenance. In addition, such the dismantling joints can effectively protect various pipelines, and at the same time can avoid the adverse effects caused by the subsidence of the earth's crust. Generally speaking, the materials of these dismantling joint are very good, even stable during their actual operation.

From the current situation, in the actual use of dismantling joint, they have different characteristics, which are composed of the main body and the sealing ring. As well as the main components of the telescopic short tube, and they are in the entire expansion joint . In the process of using, the relevant positions can be added on the original basis, and even the expansion and contraction of large places are all pipelines that use double helix to lock, which can be freely among the allowable expansion and contraction.

When the expansion and contraction is exceeded, they can play the role of limit, so as to ensure the safe operation of the entire pipeline, that is to say, this is particularly suitable for those pipelines, or pipelines with a certain degree of inclination to make effective links. At present, the dismantling joint of sewage pipelines have relatively different displacement compensations, because such pipelines can greatly reduce the driving force during operation, which can extend the service life of the pipeline, and the entire. The pipeline lines will be able to operate safely, and even they can effectively prevent damage to pipeline valves or pumps caused by excessive displacement of the pipeline.