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A Custom Spring Support Was Designed Using a Metal Bellows Instead of a Spring Coil

October 17, 2011

A Custom Spring Support Was Designed Using A Metal Bellows Instead Of A Spring Coil

A custom spring support was designed using a metal bellows instead of a spring coil. The bellows were fabricated from stainless steel because it will be used in a highly corrosive, off-shore environment. By utilizing the metallic bellows, it was much easier to customize for short-run production, produce variations of spring rate, and develop a high load-carrying capacity. An added benefit of using the bellows instead of a custom coil was that it reduced fabrication time by half. The rolled plate shown on the left is welded to the structural pipe on the platform and a riser clamp was attached on the right

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16″ Diameter Externally Pressurized Expansion Joints for an Oil Refinery

October 10, 2011

16" Diameter Externally Pressurized Expansion Joints for an Oil Refinery

These externally pressurized expansion joints are 16″ in diameter and 60-1/4″ face-to-face. The bellows are fabricated from 304 stainless steel, and the rest of the expansion joint is fabricated from carbon steel. They are custom-designed for 8″ axial movement and 150 psig at 176°F, with a spring rate of 2,152 lb./in. Each expansion joint was hydro-tested, radiographic tested, and dye penetrant tested prior to shipment.

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