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

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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)

FAQs

Are you a manufacturer or a trading company?

Can you manufacture customized flanges and pipe fittings?

Yes. In addition to standard products, we provide customized flanges and pipe fittings according to customers’ drawings, technical specifications, material requirements, dimensions, pressure ratings, surface treatments, and application conditions. Our production facilities support forging, pressing, machining, cold forming, hot extrusion, heat treatment, and other manufacturing processes.