Loose Flange – Cangzhou Huairong Pipeline Equipment Co., Ltd.

PRODUCT PARAMETERS

The Lap Joint Flange (also known as Loose Flange) is a key connection component in piping systems that enables flexible assembly. It features a slip-on structure that mates with a pipe flared end or a stub end for installation. The flange body can move freely relative to the pipe, significantly reducing the difficulty of assembly and disassembly.

This design is especially suitable for medium- and low-pressure piping systems requiring frequent maintenance and cleaning. It is adaptable to various corrosive media conditions and supports full specification customization.

Application Fields: Widely used in petroleum, chemical, oil and gas transportation, power and energy, metallurgy, shipbuilding, pharmaceutical, heating systems, and long-distance pipelines. Suitable for demanding conditions involving steam, petroleum products, gases, flammable and explosive media, and corrosive substances.

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Description

Item	Specification
Product Size	DN15–DN1200 (1/2″–48″) and other common specifications, customizable
Pressure Rating	PN2.5–PN400 / CLASS150, CLASS300, CLASS600, CLASS900, CLASS1500, CLASS2500
Manufacturing Standards	Compliant with GB, ANSI, DIN, JIS and other international standards
Material	Carbon steel, stainless steel, duplex steel, etc.
Surface Treatment	Pickling and passivation, anti-rust oil coating, painting, hot-dip galvanizing, etc.
Origin	China
Connection Type	Loose joint (loose sleeve assembly, installed with pipe flanging / welding ring)
Temperature Range	-50°C ~ +200°C (specific temperature resistance varies with material and application conditions)

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