Expansion joint
Expansion joint can also be called pipe expansion joint,
compensator, expansion. Expansion joint is divided into:
corrugated expansion joint, sleeve expansion joint,
square
natural compensation expansion joint
and other major types,
1.
Compensation for expansion deformation caused by heating of
absorption pipeline in axial, lateral and angular
directions.
2.
Absorb equipment vibration to reduce the influence of equipment
vibration on pipeline.
3.
The amount of deformation of pipelines by absorbing earthquake
and subsidence.
Because
of the heat expansion and cold contraction of the pipe, so for
the pipe, it is necessary to produce the stress and push tension
of the pipe wall; The stress on the wall of the pipe affects the
strength of the pipe, and the push and pull force increases. The
fixed bracket of the pipe should be made large to withstand the
push and pull force generated by the pipe expansion. Therefore,
the variable opening method compensated by the
ductile
iron pipe mechanical joint fittings
is used to reduce the stress and thrust of the pipe
wall.
The
expansion joint is mainly used to compensate the expansion
deformation caused by the temperature change of the pipeline, and
also to compensate the length of the pipeline due to the
installation and adjustment. It is mainly divided into three
structural forms: wholesale elbow expansion
joint,
bellows expansion joint and casing expansion joint.