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Bellow Expansion Joint

Stainless Steel Metal Bellows Expansion Joint for Plumbing

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Stainless Steel Metal Bellows Expansion Joint for Plumbing

Brand Name:	Lianghe
Model Number:	BEJ
MOQ:	1 set
Price:	$35.6-$109.8
Packaging Details:	Inside: Plastic Film ，Outside: Wooden Case
Payment Terms:	T/T, D/A, D/P, Western Union, MoneyGram, L/C

Detail Information

Product Description

Detail Information

Place of Origin:

Henan

Certification:

ISO 9001

Product Name:

Bellow Compensator

Size:

According To Your Request

End Pipe Material:

Q235B,Stainless Steel

Applicable Media:

Water, Hot Water, Steam, Oil, Air, Etc

Warranty:

12 Months

Stock:

A Large Stock

Technics:

Forged,Welded

Supply Ability:

3000 sets per month

Highlight:

stainless steel bellows expansion joint

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Product Description

Plumbing Items Metal Corrugated Welded Stainless Steel Flexible Metal Expans Bellow

Product Description:

Bellows expansion joints (metal bellows expansion joints) are flexible connection devices used to absorb displacement and deformation of piping systems caused by thermal expansion and contraction, vibration or foundation settlement.

Stainless Steel Metal Bellows Expansion Joint for Plumbing 0

Main structure:
Metal bellows: core component, usually made of stainless steel (such as 304, 316L), providing flexibility through multi-layer or single-layer corrugated structure.

Flange/welding end: connected to the pipeline, flange type is easy to disassemble, and welding type has better sealing.

Limiting pull rod/hinge: prevent excessive compression or stretching, protect the bellows.

Outer sheath (optional): dustproof and mechanical damage proof.

Stainless Steel Metal Bellows Expansion Joint for Plumbing 1

Common types:

Type	Features	Application Scenario
Axial type	Absorption pipe axial expansion and contraction (compression/tension)	Thermal compensation of straight pipe sections
Horizontal type	Compensation for lateral displacement perpendicular to the pipe axis	Pipeline lateral deviation or settlement
Angle type	Absorption duct angle variation (typically ±15°)	Angular displacement near the elbow
Universal hinge type	Multi-directional compensation (axial + lateral + angular)	Complex 3D piping system
Pressure Balance Type	Eliminate internal pressure thrust and protect fixed bracket	High-pressure, long-distance pipelines (such as steam pipe networks)

Core parameters and selection points

Compensation

Axial compensation: the maximum displacement that the bellows can compress/stretch (such as ±50mm).

Lateral compensation: depends on the length and structure of the bellows.

Pressure level

Need to match the pipeline working pressure (such as 0.6MPa, 1.6MPa, 2.5MPa).

Temperature range

Conventional material (304 stainless steel): -196℃~+450℃; high temperature requires special materials (such as Inconel).

Fatigue life

Usually ≥1000 cycles (need to be checked according to the displacement).

Connection method

Flange type: ANSI, DIN, GB standard flange.

Welded type: suitable for scenes with high pressure or high sealing requirements.

Common Problems and Solutions

Bellows leaks:

Cause: corrosion/fatigue cracking
Solution: Replace with higher quality material (such as 316L), add anti-corrosion layer

Insufficient compensation:
Reason: wrong selection or excessive pipe displacement
Solution: recalculate displacement and replace with a larger compensation model

Abnormal support force:
Reason: guide support or fixed support is not set
Solution: check whether the support layout meets the design requirements

If you encounter the above problems when using bellows compensators in pipelines, please contact us to provide you with professional technical guidance to ensure the safe and stable operation of the pipeline.

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