expansion joint，Packed Expansion Joints，Single-ended sleeve type expansion joint with a filler for supplementary oil injection nozzle，
Welding sliding expansion joint，Flange connection, sliding telescopic joint，One-way expansion joint，Two-way expansion joint
1.Core Function
This type of expansion joint is mainly used in pipeline systems to absorb axial deformation caused by temperature changes,
mechanical displacements, etc., and to compensate for the thermal expansion and contraction of the pipeline,
thereby protecting the pipeline and equipment from damage.
2. Description of Key Components
◦ Single-ended slip-type (Single-ended Sleeve Type):
This refers to the compensation structure of the expansion joint being a single-ended sliding design.
The structure is relatively compact and is suitable for medium and small-sized pipes.
◦ Guns for replenishing packing (packing filling nozzle / packing gun interface):
The sealing packing of the expansion joint will wear out and age over time.
This interface can be replenished with packing in the sealing chamber using a special tool (packing gun),
enabling maintenance under pressure without stopping production, and extending the service life of the equipment.
3. Typical application scenarios
It is commonly seen in scenarios such as thermal pipeline networks, petrochemical pipelines,
and water supply and drainage systems where there are high requirements for compensation and maintenance.
