Spun Metal Cylinders: Seamless Pressure‑Vessel Workpieces

These spun cylindrical components are seamless rotary metal parts manufactured by metal spinning technology. Starting from flat metal sheet blanks, the material undergoes continuous plastic deformation under spinning roller force at high rotational speed, forming an integrated hollow cylindrical structure without welding joints.

This type of workpiece is widely adopted for small pressure containers, portable gas cylinders and related industrial hardware. Compared with welded counterparts, the spinning‑formed cylinder eliminates welding seams, delivering superior mechanical strength and reliable pressure‑bearing capacity, which is critical for safety‑focused pressure‑holding applications. It supports mass‑volume production, meeting large‑batch order demands for industrial clients.

Key Characteristics

• Seamless integrated structure

Whole‑piece forming without welding lines. The structural integrity avoids leakage risks caused by weld defects, greatly improving safety performance under internal pressure.

• Controllable wall thickness

Wall thickness can be adjusted via multi‑pass spinning processes. Uniform material distribution ensures stable performance across the whole cylinder body.

• Excellent material utilization

As a plastic forming process instead of cutting processing, material loss is minimal. It lowers raw‑material costs for mass production.

• Fine surface finish

The spinning process generates smooth outer and inner surfaces. Additional polishing treatment can be applied according to customer requirements to achieve higher surface quality.

• Flexible dimensional range

Customizable diameter, body length and neck size. Different dimension specifications can be realized by replacing tooling and adjusting spinning parameters.

Applicable Raw Materials

Normally produced from ductile metals: aluminum alloy, mild carbon steel, stainless steel, copper. Material selection depends on working pressure, medium and service environment of the final product.

Main Application Scenarios

• Small portable gas cylinders and miniature pressure vessels
• Industrial storage and pressure‑bearing hardware
• Fire‑support auxiliary components
• Special‑purpose rotary hollow structural parts for machinery equipment

FAQ

Q: Why choose spun cylinder instead of welded type?

A: No weld seams. Higher pressure resistance, no weld‑crack leakage hazard.

Q: Are dimensions customizable?

A: Yes. Diameter, length, wall thickness and neck size are configurable within machine capacity.

Q: What parts cannot be made by spinning?

A: Only rotation‑symmetric hollow parts are available. Non‑rotational shapes are not feasible.

Q: What secondary treatments are available?

A: Sandblasting, painting, anodizing, threading and neck‑in processing.