Compound axial expansion joint

Product Introduction

        1. Structure and composition

Compound axial expansion joint (also known as compound tie rod corrugated expansion joint, axial type compound corrugated compensator) is composed ofTwo or more bellowsconnected in series by intermediate pipes and equipped withTie rod, end plate, spherical washer, guide supportIt is composed of other structural parts. Its core design absorbs the thermal expansion and contraction, vibration or installation errors of the pipe through the elastic deformation of the bellowsAxial displacementAndLateral displacementWhile enhancing the overall stability through the tie rod structure.

        2. Functional Features

• Large compensation amount: It is suitable for scenarios with low fatigue times and large displacement compensation requirements, and the axial compensation amount can reach72-500mmWhich is significantly better than the mono-type structure.

• Strong pressure bearing capacity: Affordable0.25-2.5 MPaWorking pressure, maximum temperature resistance420℃And is suitable for high temperature and high pressure working conditions.

• High stability: The design of the tie rod and guide support effectively disperses the internal pressure thrust, reduces the load of the fixed support and prolongs the life of the pipeline system.

• Corrosion resistance: Bellows material optionalStainless steel 304/316L/321Carbon steel or stainless steel is used for flanges and pipes to adapt to corrosive environments such as chemical industry and electric power.

        3. Application Scenario

• Energy and Thermal Systems: Steam heating pipelineAnd heat network pipelines for absorbing thermal displacement.

• Industrial pipeline: Chemical, petroleum, metallurgy and other fieldsLong distance large diameter pipelineAnd compensates for axial expansion and contraction deformation.

• Complex installation environment: Replace multiple sets of compensators to simplify the design when the pipe crosses the road, vertical section or horizontal turn section.

        4. Technical parameters

        5. Installation and Precautions

• Protect bellows: Avoid welding splash and mechanical collision to damage the bellows surface.

• Guide Support Setup: Both ends should be equipped with guide supports to ensure even absorption of displacement.

• tie rod adjustment: Remove the transport rod after installation, and keep the limit rod to control excessive deformation.

• Forced deformation prohibited: Do not use expansion joints to adjust pipeline installation errors.

        6. Comparison of advantages

Compared with the single expansion joint, the duplex structure2-3 times increase in compensationAnd the fatigue stress is reduced by the series connection of multi-bellows, which is suitable for more severe working conditions. Compared with similar products (such as transverse large tie rod expansion joint), itsCompact structure、Low manufacturing costsEspecially suitable for the economical design of long-distance pipelines.