The limit expansion joint is a device used for pipe connection, mainly to compensate for the expansion and contraction displacement of the pipe and absorb vibration, while limiting the expansion and contraction amount of the pipe to protect the safe operation of the pipe system. The following is its detailed introduction:
Structural characteristics
Expansion and contraction section: It is usually composed of two layers of metal pipes, the inner layer pipe can freely expand and contract within the outer layer pipe to adapt to the length changes caused by thermal expansion and contraction of the pipe or other reasons.
Limit device: This is a key component of the limit expansion joint, generally composed of bolts, nuts and limit plates, etc. By adjusting the position of the bolts, the expansion range of the expansion joint can be restricted to prevent excessive expansion and contraction of the pipeline, which may cause damage.
Sealing structure: To prevent the leakage of the medium inside the pipeline, limit expansion joints usually use rubber sealing rings or other sealing materials for sealing. The sealing structure is installed at both ends of the expansion part to ensure good sealing during the expansion and contraction of the pipeline.
Connection method: The two ends of the limit expansion joint are generally connected by flanges, which facilitates installation and disassembly with other components in the pipeline system. Some also adopt welding or threaded connection methods, and the selection is made based on different pipe materials and usage requirements.