FLEX-WELD

Engineered Metal Expansion Joints, Bellows & Flexible Hose Solutions

For over 100 years, Flex-Weld Incorporated and KEFLEX™, a division of Kelco Industries, have been trusted by engineers and OEMs for high-performance metal expansion joints, bellows, flexible hose assemblies, and custom motion-control components. Designed and manufactured in North America, our products help you isolate vibration, control axial and lateral motion, and compensate for thermal pipe expansion and contraction — keeping critical systems running safely and efficiently.

Browse Our Products & Solutions

Our Products & Solutions

Stainless steel industrial heat exchanger for efficient thermal processing.

Expansion Joints
& compensators

Braided flexible metal hoses for industrial piping systems.

Expansion Loops
& hose assemblies

High-quality industrial metal parts and custom machined components from Kelco Industries.

Exhaust
Bellows

High-quality industrial springs and metal components for manufacturing and industrial applications.

Metal Bellows
& Assemblies

piping accessories

Piping
Accessories

keflex delegated design services

Delegated
Design Service

Why choose FLEX-WELD

made in america usa flag
ISO-certified and proudly Made in the USA, Flex-Weld designs and manufactures metal expansion joints, bellows, and flexible hose assemblies engineered for performance, safety, and longevity. With in-house forming, welding, and testing, delegated design capabilities, and PE-stamped engineering support, we deliver custom-engineered flexible metal solutions that ensure reliability in HVAC, industrial, power generation, and aerospace applications.
Industrial pipeline system with yellow valves at Kelco Industries factory.

Built on Trust.

  • High-quality Boeing logo featuring blue text and iconic emblem, representing aerospace innovation and engineering excellence.
  • High-quality Lockheed Martin aerospace and defense manufacturing facility at Kelco Industries.
  • Sealed federal emblem of the Department of Defense representing U.S. military and defense authority.
  • Virgin Galactic spaceship logo with vibrant purple and pink colors, space tourism branding.
  • BAE Systems logo on a black background, representing advanced defense and aerospace technology.

    • Driven by Excellence.

    Have Questions?
    Connect With an Expert

    • Expert product, application, and design assistance
    • Fast response times to keep your project moving
    • Custom solutions tailored to your exact specifications
    • Guidance on material selection, performance, and compliance
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    Industries We Serve.

    Offshore oil drilling platform with yellow structural components and support crane over calm ocean waters.

    OIL, GAS & PETROCHEMICAL

    High-pressure, corrosion-resistant hoses and joints for refining, pipelines, and offshore platforms.

    Industrial HVAC ventilation system installation in progress at Kelco Industries.

    HVAC & BUILDING SYSTEMS

    Pump connectors, loops, and compensators to reduce vibration and increase system life.

    Hydropower dam with water releasing, producing renewable energy at sunset.

    POWER GENERATION & ENERGY

    Expansion solutions for turbines, boilers, and high-temperature piping systems.

    Industrial wastewater treatment plant with clarifiers and tanks at Kelco Industries.

    WATER TREATMENT & PROCESS INDUSTRIES

    Flexible metal solutions that maintain uptime in water, wastewater, and chemical processing plants.

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    FOOD & BEVERAGE MANUFACTURING

    Sanitary, durable expansion joints and hoses that meet strict hygiene and performance standards.

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    AEROSPACE & DEFENSE

    Lightweight, reliable bellows and joints for aircraft, spacecraft, and military applications.

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