can also be designed for large amounts of axial compression or a combination of both. Tie rods are designed to absorb the full pressure thrust of the bellows eliminating the need for anchors when used for lateral offset only. The universal expansion joint can be used in a wide variety of applications from engine exhaust piping systems, steam piping and even for seismic isolation. The design team at Triad Bellows Design and Manufacturing is always ready to help design your next project.

Triad Bellows Design and Manufacturing will custom design a metal bellows to meet your customer’s specific application. We use sophisticated engineering software developed to meet the strict guidelines of the Expansion Joint Manufacturing Association (EJMA) 9th Edition. If your requirement has already been engineered we can make your bellows to your specifications. Read More...

Externally Pressurized Expansion Joints for extreme axial travel. Triad Bellows custom designs externally pressurized expansion joints up to 18” diameter with axial compression capabilities up to 16” travel. All expansion joint are manufactured in the United States and can be custom designed with all stainless steel construction, Inconel bellows, ANSI forged flanges etc… By design the externally pressurized expansion joint is extremely rugged and has several built in features. The construction provides an external cover for the bellows and a flow liner for the media. Special lengths are never a problem.

Every step of the bellows forming process has been carefully planned to meet our lean manufacturing goals. The same careful planning has gone into the design of our custom manufactured bellows equipment. The result is an extremely accurate product at very competitive prices. Our automated bellows formers use a controlled 12 step and 16 step process to shape each convolution. This process takes longer than manual bellows punching but material thinning is almost eliminated. The bellows convolutions at Triad are always evenly spaced, straight and scratch free.

With modular tooling Triad can manufacture even the odd diameter bellows and metric sizes. With the addition of new tooling our size restriction will increase to 144” diameter. As with the smaller bellows we can make the larger ones in multi-ply construction for increased cycle life and movement capability. High temperature T-321 stainless steel is our standard material of construction but T-316, T304, T309, T310, Hastelloy X, Hastelloy C276, Inconel 625 and other alloys can also be used.With modular tooling Triad can manufacture even the odd diameter bellows and metric sizes. With the addition of new tooling our size restriction will increase to 144” diameter. As with the smaller bellows we can make the larger ones in multi-ply construction for increased cycle life and movement capability. High temperature T-321 stainless steel is our standard material of construction but T-316, T304, T309, T310, Hastelloy X, Hastelloy C276, Inconel 625 and other alloys can also be used.

Triad bellows stocks special flanges to mate with most major engine manufacturers exhaust manifolds and turbo chargers. Floating flanges are standard for Caterpillar, Cummins and Detroit / MTU exhaust expansion joints. For Waukesha engines we have developed a 25% heavier lip flange manufactured in high temperature T321 stainless steel. This heavy duty lip flange prevents pre-mature fatigue cracking sometimes experienced with OEM expansion joints. All expansion joints can be manufactured to any length that best suits the available space. Any weldable fitting can be attached to the outlet side of the bellows to make the installation quick and easy. Manufacturing custom expansion joints is our business, let us know how we can help.

Triad Bellows designs and manufactures metal bellows and metal bellows expansion joints in accordance with the Expansion Joint Manufacturers Associations latest 10th Edition standards.  Bellows design calculations are provided with each quotation.  All expansion joints manufactured with tie rods are designed to withstand the full pressure thrust load. At Triad Bellows our goal is to provide innovative, cost saving designs without sacrificing quality and never taking shortcuts.

With our sworn commitment to your needs, you can be confident that your order is in good hands with Triad Bellows Design and Manufacturing.