Structural Composition

• Bellows: The core part, typically made of high-temperature and corrosion-resistant metals such as stainless steel. Its corrugated design provides high elasticity, enabling flexible expansion and contraction.
• Flanges: Usually made of carbon steel or stainless steel, they connect the expansion joint to the pipeline, ensuring a secure fit with the 100LB pressure class.
• Tie rods: Limit the stretching range of the expansion joint to prevent over-extension.
• Guide brackets: Help ensure displacement occurs in the specified direction, maintaining stable operation.

Working Principle

Product Features

• Strong compensation capability: Achieves large axial, lateral, or angular displacement compensation in limited space, ideal for compact piping systems.
• High temperature and pressure resistance: Withstands temperatures up to 400°C or higher, and operates stably under 100LB pressure conditions.
• Excellent corrosion resistance: Stainless steel bellows enable long-term operation in corrosive media (e.g., acidic gases or chemical liquids), reducing maintenance costs.

Types

• Bellows expansion joint: The most common type, using elastic corrugated structures to absorb axial, lateral, or angular displacements.
• Sleeve expansion joint: Features inner and outer sleeves that slide axially to compensate for large displacements, suitable for scenarios requiring significant movement but with stricter installation requirements.
• Rotary expansion joint: Equipped with rotating bearings to compensate for angular displacement, ideal for equipment rotation parts or pipeline corners.

Application Scenarios

• Petrochemical industry: Absorbs thermal expansion in refinery pipelines, ensuring stability in high-temperature and frequent temperature-fluctuation environments.
• Power industry: Effectively compensates for displacement in steam pipelines of thermal power plants, guaranteeing normal operation of equipment.
• Building HVAC systems: Relieves pipeline stress caused by temperature changes in large-scale heating and ventilation systems, preventing pipe damage and leaks.