Exhaust Bellows

MADE IN THE USA

Engineered Metal Exhaust Bellows for High-Temperature, High-Performance Systems

Flex-Weld designs and manufactures custom metal exhaust bellows and exhaust system components engineered to reduce vibration, absorb thermal expansion, and extend the life of critical piping and engine systems. Built from single- or multi-ply stainless steel bellows, each assembly delivers superior flexibility, low spring rates, and exceptional cycle life under extreme heat and pressure.

From diesel engines, marine exhaust, and power generation systems to industrial process and high-temperature ducting, Flex-Weld exhaust bellows are trusted wherever performance, reliability, and precision fabrication matter most. Available in a range of materials, diameters, and configurations, our products are manufactured in the USA and custom-engineered to meet your exact specifications.

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Our Products & Solutions

Stainless steel industrial pipe fittings and flanges for manufacturing applications.

10MC Series Bellows
and Expansion Joints

Engineered for vibration absorption and stress relief in HVAC and industrial piping systems, Keflex™ braided hose assemblies feature annular corrugated stainless steel hose with a high-tensile wire braid for maximum flexibility, corrosion resistance, and long service life. Available in custom lengths, end fittings, and double-braid configurations for higher-pressure performance.

30mc series bellows and expansion joints overview image

30MC Series Bellows
and Expansion Joints

UL-Listed flexible connectors designed for fire sprinkler and mechanical piping systems. These stainless steel assemblies absorb vibration, misalignment, and lateral offset—protecting equipment and ensuring reliable, code-compliant operation. Available in multiple lengths and end configurations for easy installation and maintenance.

Stainless steel industrial rims and wheels for manufacturing processes.

1207 Series 3-Ply
Exhaust Capsules
& Expansion Joints

Keflex™ expansion loops provide a compact, maintenance-free solution for controlling thermal expansion and seismic movement in piping systems. Designed for high-pressure, ultra-clean, or corrosive environments, each loop minimizes stress, reduces anchor requirements, and simplifies installation compared to traditional bellows-type joints.

1407 series 5 ply exhaust capsules & expansion joints overview

1407 Series 5-Ply
Exhaust Capsules &
Expansion Joints

UL-Listed fire-rated expansion loops for sprinkler and mechanical systems engineered to absorb thermal growth, axial movement, and unpredictable seismic activity. Their space-saving design and simple installation make them ideal for new construction or retrofit projects requiring safety, flexibility, and proven performance.

AEROSPACE

DEFENSE

GROUND VEHICLEs

AUTOMATION

MEDICAL

Flex-Weld keeps industry flowing—one engineered joint at a time.

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Proudly Made In USA

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