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

PRODUCT PARAMETERS

The Pipeline Expansion Joint (also known as Expansion Coupling or Limit Expansion Joint) is a core axial displacement compensation component in pipeline systems. It consists of an expansion tube, body, gland, and limit bolts.

Its primary function is to achieve allowable axial expansion and contraction, compensating for length changes caused by thermal expansion/contraction, foundation settlement, or installation deviations. It also facilitates the disassembly and maintenance of valves and pumps. This makes it a critical accessory for medium- and low-pressure water supply & drainage, heating systems, and industrial pipelines.

Application Fields: Widely used in municipal water supply & drainage, fire protection networks, heating & thermal systems, wastewater treatment plants, waterworks, petrochemical industry, power station pump rooms, metallurgy, and mining sectors. Suitable for transporting various media such as clean water, wastewater, circulating water, petroleum products, and gases—especially in pipeline systems requiring frequent maintenance of valves/pumps or experiencing thermal expansion/contraction or foundation settlement.

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Description

Item	Specification
Product Size	DN25–DN1200 (1″–48″) and other common specifications; customization available
Pressure Rating	PN6–PN25 / Class 150 (higher pressure ratings can be customized as required)
Manufacturing Standards	Complies with GB, ANSI, DIN, JIS and other international standards
Material	Body / Expansion Pipe / Flange: Carbon steel, stainless steel, alloy steel, low-temperature steel, duplex steel; Sealing Ring: Natural rubber, EPDM, NBR, etc.
Surface Treatment	Pickling and passivation, anti-rust oil coating, painting, hot-dip galvanizing, sandblasting, etc., as per customer requirements
Origin	China
Connection Type	Flanged connection; welded connection customizable
Temperature Range	-40°C ~ +420°C (specific temperature resistance depends on material and application conditions)

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