Curved tube pressure balance expansion joint

Product Introduction

Curved tube pressure balance expansion joint is a key compensation device used to absorb displacement and balance internal pressure thrust in pipeline system. The following is a detailed introduction:

I.Product structure and principle

1. Core Components
   From the front (channel end)Two working bellowsRear (balance end)A balanced bellowsIs composed of a large tie rod, an end plate, an intermediate pipe and the like.

• Working bellows: Absorbs lateral displacement and axial displacement generated at the bend of the pipe.

• Balanced bellows: The internal pressure thrust is transmitted through the tie rod to offset the pressure load of the main bellows and avoid the pipeline system from bearing additional thrust.

II.Functional Features

1. Displacement compensation capability

• simultaneously absorbableAxial displacementAndLateral displacementEspecially suitable for complex layouts such as L-shaped and Z-shaped pipes.

• The compensation range is wide, and the single wave compensation can reach tens of millimeters.

• By balancing bellows to offset internal pressure thrust and avoid extra load on pipelines or equipment, it is suitable for sensitive equipment such as pumps, compressors, gas turbines, etc.

• Optimize the structural design (such as large tie rod spherical nut), reduce the turbulent impact of media, and effectively attenuate the pressure fluctuation and vibration during start/stop.

III,Technical parameters and materials

• Specification Range: Diameter DN32-DN4000mm, working pressure 0.25-2.5MPa.

• Material selection: Carbon steel (Q235), stainless steel (304, 316L, etc.), adapted to high temperature, corrosive medium environment.

• Applicable temperature: Usually-20℃ ~450℃, special working conditions can be customized.

Four,Application Scenario

1. Industrial domain：

• Power industry: gas turbine exhaust pipes, boiler systems.

• Petrochemical/Metallurgical: High temperature flue, desulfurization and dust removal system.

• Space-constrained pipe bends or equipment connections.

• Long-distance pipelines where fixed brackets are subjected to thrust need to be avoided.

Five,Installation and maintenance

1. Installation Points：

• Remove the transport fixture of the small tie rod and adjust the nut of the large tie rod to the appropriate tightness.

• Pay attention to pre-compression/pre-tension adjustment when horizontal installation to reduce elastic reaction force.

• The warranty period is usually 1 year, with regular technical visits and 24-hour emergency services.

VI,Technical advantages

• Standardized design: It meets the American EJMA standard and domestic GB/HG standard, and has high stability.

• Economy: Reduce the number and strength requirements of fixed brackets, and reduce the engineering cost.

        sum up: Curved pipe pressure balance expansion joint solves the problems of displacement compensation and thrust transmission in complex pipeline system through innovative structural design and pressure balance mechanism, and is a key component in petrochemical industry, electric power, metallurgy and other fields. More technical details can be referred to sources such as.