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Externally Pressurized Expansion Joints, Externally pressure corrugated expansion joint
Valve well installation external pressure corrugated expansion joint,
axial external pressure type corrugated expansion joint,
which is composed of bellows, outer pipe and end ring and other components that bear external pressure,
and is only used to absorb the axial displacement and cannot withstand the pressure thrust of the bellows.
When the required axial displacement is large, and the use of internal pressure axial expansion joint
is limited due to the problem of column instability, the external pressure expansion joint can be considered,
which is characterized by the absence of column instability problem and the large amount of axial compensation.
When the expansion joint is working, the bellows is under tension, not compression.
