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Product Introduction
The Hinged Expansion Joint is a commonly used compensating element in industrial pipeline systems. It is mainly used to absorb the displacement of pipelines caused by thermal expansion and contraction, vibration or installation errors, and at the same time restrict the movement of pipelines in a specific direction. The following is a detailed introduction to the hinge-type expansion joint
1. Structure and Working principle
Structural composition
Corrugated pipe: The core component, made by pressing multiple layers of thin stainless steel plates, is flexible, capable of withstanding pressure and compensating for displacement.
Hinge mechanism: Composed of a hinge plate, a pin shaft and bolts, it provides rotational freedom and limits lateral and axial displacement.
End pipe/flange: Used for connecting pipeline systems.
2. Main features
Limit the direction of displacement: Only rotation around the hinge pin shaft (angular displacement) is allowed, and displacement in other directions is restricted.
Pressure-bearing thrust: The hinge structure can withstand the internal pressure thrust of the pipeline, reducing the load on the pipeline support.
Used in pairs: It is often combined with another hinge-type expansion joint or universal expansion joint to achieve complex displacement compensation.
High rigidity: The hinge mechanism offers high rigidity and is suitable for applications that require precise guidance.
3. Application scenarios
Thermal expansion compensation for pipelines: such as steam pipelines and thermal power networks.
Space-constrained occasions: Compact layouts that require directional compensation.
Vibration isolation: Reduce the vibration transmission of equipment (such as pumps and compressors).
High-pressure operating conditions: Typically, the design pressure can reach PN10 to PN40 (or even higher).
4. Installation and Precautions
Installation points
Ensure that the axis of the hinge pin is perpendicular to the displacement plane of the pipeline.
When used in pairs, the hinge pins of the two expansion joints must be aligned.
Avoid pre-stretching or compressing beyond the design range.
Maintenance inspection
Regularly inspect the wear of the hinge pin shaft, corrosion or deformation of the bellows.
Make sure the bolts are tightened to prevent loosening.
5. Selection parameters
Design pressure/temperature: Select the material (such as 304/316 stainless steel) based on the medium conditions.
Compensation amount: Angular displacement capacity (usually ±5° to ±10° for a single hinge).
Connection method: Flange connection or direct welding.
Standard specification: Complies with international standards such as EJMA (Expansion Joint Manufacturers Association) and ASME B31.3.
1. Structure and Working principle
Structural composition
Corrugated pipe: The core component, made by pressing multiple layers of thin stainless steel plates, is flexible, capable of withstanding pressure and compensating for displacement.
Hinge mechanism: Composed of a hinge plate, a pin shaft and bolts, it provides rotational freedom and limits lateral and axial displacement.
End pipe/flange: Used for connecting pipeline systems.
2. Main features
Limit the direction of displacement: Only rotation around the hinge pin shaft (angular displacement) is allowed, and displacement in other directions is restricted.
Pressure-bearing thrust: The hinge structure can withstand the internal pressure thrust of the pipeline, reducing the load on the pipeline support.
Used in pairs: It is often combined with another hinge-type expansion joint or universal expansion joint to achieve complex displacement compensation.
High rigidity: The hinge mechanism offers high rigidity and is suitable for applications that require precise guidance.
3. Application scenarios
Thermal expansion compensation for pipelines: such as steam pipelines and thermal power networks.
Space-constrained occasions: Compact layouts that require directional compensation.
Vibration isolation: Reduce the vibration transmission of equipment (such as pumps and compressors).
High-pressure operating conditions: Typically, the design pressure can reach PN10 to PN40 (or even higher).
4. Installation and Precautions
Installation points
Ensure that the axis of the hinge pin is perpendicular to the displacement plane of the pipeline.
When used in pairs, the hinge pins of the two expansion joints must be aligned.
Avoid pre-stretching or compressing beyond the design range.
Maintenance inspection
Regularly inspect the wear of the hinge pin shaft, corrosion or deformation of the bellows.
Make sure the bolts are tightened to prevent loosening.
5. Selection parameters
Design pressure/temperature: Select the material (such as 304/316 stainless steel) based on the medium conditions.
Compensation amount: Angular displacement capacity (usually ±5° to ±10° for a single hinge).
Connection method: Flange connection or direct welding.
Standard specification: Complies with international standards such as EJMA (Expansion Joint Manufacturers Association) and ASME B31.3.
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