Steam pipe expansion joints (compensators) are available in a variety of models and can be classified in multiple categories depending on their construction, function, and installation. Here are some common steam pipe expansion joint models and their features:
Axial expansion joint：
This expansion joint is mainly used to absorb the thermal expansion and contraction of the pipe in the axial direction (i.e. the length direction of the pipe).
Examples of models: TWY, TW, TD, TA, etc., where TWY denotes an axial type external pressure corrugated compensator.
transverse expansion joint：
Designed to compensate for pipe lateral displacement.
Model examples: TWL, TH, TL, THD, etc.
Angular expansion joint：
Allows the pipe to bend in two planes.
Model examples: TP, JXW, etc.
Universal Expansion Joint：
Combining axial, transverse and angular compensation capabilities, it is suitable for complex displacement conditions.
Model examples: TWU, UG, TWUG, etc.
Pressure balanced expansion joint：
Designed to maintain internal pressure balance under external pressure changes, avoiding additional thrust on the expansion joint.
Model examples: TWB, TWBP, etc.
Tie rod expansion joint：
A tie rod structure is used to limit the lateral displacement of the expansion joint while allowing for axial displacement.
Model examples: yc301, TWL, TWLH, etc.
Spherical compensator：
Provides multi-directional displacement compensation and is typically used for large diameter pipes.
Model Examples: QB, QD, etc.
Corrugated expansion joint：
The displacement is compensated by the expansion and contraction of the bellows, which is one of the most common types.
Examples of models: DN200, DN800, DN900, etc., where "DN" indicates nominal diameter.
Non-metallic expansion joint：
Made with non-metallic materials (e.g. fabric, rubber), suitable for certain special media and environments.
Model Example: Not specifically indicated, but may be named after material or functional characteristics.
Each model of expansion joint has its specific application range and working conditions. When choosing an expansion joint model, you need to consider the diameter of the pipe, the temperature and pressure of the medium, the amount of displacement, the layout of the pipe, and other factors. For example, for high-temperature steam pipelines, expansion joints made of high-temperature resistant stainless steel materials are usually selected; For cases where multi-directional displacement is required to be absorbed, a general-purpose or spherical compensator can be selected.
Each manufacturer uses its own unique model naming rules, so when ordering an expansion joint, in addition to the model number, the specific technical parameters of the expansion joint should be specified, such as working pressure, temperature range, number of corrugations, connection mode (flange, welding, etc.) and special functional requirements, etc.