Bellows Expansion Joint – Cangzhou Huairong Pipeline Equipment Co., Ltd.

PRODUCT PARAMETERS

The Bellows Expansion Joint (also known as Metal Bellows Pipe Expansion Joint) is a core thermal compensation and vibration damping component in pipeline systems. Its main structure consists of stainless steel bellows, flanges, and limit tie rods.

It is primarily used to compensate for axial, lateral, and angular deformations in pipelines caused by thermal expansion/contraction, mechanical displacement, and foundation settlement. Additionally, it absorbs vibrations and noise generated by industrial equipment, preventing pipeline rupture due to stress concentration. It is a critical safety component for high-temperature, high-pressure, and complex operating conditions.

Application Fields: Widely used in petroleum & petrochemical, oil & gas transportation, power & energy (thermal & nuclear), metallurgy & steelmaking, marine & offshore engineering, municipal heating, and wastewater treatment industries. Suitable for conveying steam, high-temperature flue gas, oil & gas, corrosive media, and cryogenic fluids, meeting the demands of harsh conditions such as high temperature & pressure, strong vibrations, and large displacement.

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Description

Item	Specification
Product Size	Common specifications: DN25 – DN1200 (1″ – 48″), supporting large-diameter customization.
Pressure Rating	PN6 – PN100 / Class 150, Class 300, Class 600.
Manufacturing Standard	Complies with international standards such as GB, ANSI, DIN and JIS.
Material	Bellows: Stainless steel. Flange / Tie Rod: Carbon steel, stainless steel, alloy steel, pipeline steel, low-temperature steel, duplex steel.
Surface Treatment	Including galvanizing, painting, epoxy anti-corrosion, pickling passivation, polishing, sandblasting, etc. (customized according to customer requirements).
Origin	China
Connection Method	Flange connection (standard configuration); customizable welding connection (butt welding / socket welding) is available.
Temperature Range	-196℃ ~ +450℃ (the specific temperature resistance range depends on the material and application working conditions).

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