Bellows featuring multi-ply geometry produced by telescoping thin wall precision tubing. The most important feature of KELCO (formally Flex-Weld) bellows is the multi-ply geometry produced by telescoping thin wall precision tubing. Utilizing the same dimensions,  bellows can accept significantly more movements than our competitors. The stresses induced on the individual layers of bellows are a fraction of the stresses induced in single wall bellows of equal thickness. This results in  bellows having a much higher cycle life and lower spring rates than our competition.

KELCO (formally, Flex-Weld, Inc.) Keflex™ engine and exhaust bellows are the most reliable in the industry. They offer a 5-year extended warranty for the products they design. They can perform complete engineering take-offs on all new and refurbished ship exhaust systems, including expansion joint selection, location, quantity and system configuration. They have exceptional expertise in our multi-ply thin-wall bellows construction with proprietary convolution shape. This combination provides their bellows with extended fatigue resistance and cycle life.

The bellows can be manufactured from a wide range of alloys, including T-321 high temperature-resistant stainless steel, T-316L corrosion-resistant stainless steel, or Inconel and Monel alloys to preclude salt water and chloride corrosion. Their metallurgical department can analyze failures and engineer a suitable replacement.