Hinged Metal Expansion Joint

A Hinged Metal Expansion Joint combines a metal bellows with a hinge assembly. It is mainly designed to allow angular movement within one specified plane. The hinge structure controls the movement direction and carries specific directional loads produced by internal pressure.

Compared with an unrestricted expansion joint, the hinged design guides the bellows to move at a planned angle and within a defined plane. This makes it suitable for piping systems where the movement direction and load path must be controlled.

The main bellows material can be stainless steel or an alloy material. End connections can be designed with flanges or end pipes. The hinge position, component length, and connection arrangement can be customized according to the pipeline layout and installation space.

Hinged units are normally installed in pairs or groups. Several angular units can work together to absorb thermal movement in a pipeline. The hinge axis can be positioned for horizontal, vertical, or turning pipe arrangements.

For high-temperature piping or steam systems, the hinge axis should be confirmed according to the fixed points, guiding points, pipeline direction, and pipe turns. For chemical equipment connections, the purchaser should provide the medium, design pressure, design temperature, pipe diameter, angular movement, and allowable equipment interface load.

The hinge structure is intended to control angular movement in the specified plane. It should not be required to absorb movement in other directions without a complete structural review.

Before ordering a Hinged Metal Expansion Joint, the customer should provide the full pipeline arrangement rather than only the pipe diameter and flange dimensions. This gives the technical team a clearer basis for confirming the hinge position and movement direction.

Yixing Blog Pipeline Equipment Co., Ltd. can customize the bellows structure, hinge position, component length, and connection form according to piping drawings, equipment interface drawings, or site installation dimensions.

The factory has hydroforming, sheet metal bending, automatic longitudinal seam welding, argon arc welding, laser cutting, and pressure testing capabilities. Bellows, hinge plates, pin structures, end pipes, and flanges can be manufactured and assembled within the same project.

Inspection focuses on corrugation dimensions, hinge-axis position, weld location, and overall assembly condition. Acceptance checks are arranged from raw material cutting through welding, forming, assembly, and finished-product inspection.

Every product is inspected before packaging. Customer-arranged third-party inspection is also supported.

This product is suitable for high-temperature pipelines, turning pipe systems, steam systems, chemical equipment, and engineering installations that require movement-direction control.

OEM and ODM production is available. Products can be manufactured according to drawings or prototypes. The minimum order quantity is one piece.

One standard specification normally requires about one month for production. Products involving special materials, larger quantities, new tooling, or a more complex structure generally require two to three months.

Photos or videos can be provided during manufacturing. Small packages and wooden cases are available. EXW and FOB delivery terms are supported. A six-month industry warranty is provided, with installation and operating support available by phone, online communication, or on-site assistance.

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