Expansion Joints & compensators

MADE IN THE USA

Engineered Metal Expansion Joints & Compensators for HVAC, Power & Industrial Systems

Flex-Weld designs and manufactures metal expansion joints and compensators that absorb movement, vibration, and thermal expansion in critical piping systems. Built in the USA and engineered to EJMA and ASME standards, our assemblies are available in single-ply, multi-ply, externally pressurized, and universal designs for unmatched flexibility and fatigue life.

Each unit is precision-welded, hydrostatically tested, and quality-verified to ensure leak-free performance in high-pressure, high-temperature environments.
From HVAC and power generation to chemical processing and aerospace, Flex-Weld expansion joints safeguard equipment, extend service life, and maintain system integrity under demanding conditions. Whether you require a standard catalog model or a custom-engineered compensator, our in-house forming, welding, and testing capabilities deliver proven performance and reliability—ready for your next installation.

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Our Products & Solutions

High-quality industrial expansion joint for piping systems.

30MC Series Bellows
& Expansion Joints

Compact, all-metal expansion joints engineered to absorb axial, lateral, and angular movement in industrial piping. Built from stainless steel bellows with optional liners and covers, the 30MC Series provides durable, leak-free thermal expansion control in HVAC, steam, and process applications.

Industrial pneumatic components for manufacturing and automation solutions.

7Q Series Quadra-Side
Expansion Compensator

The 7Q Series features a four-way bellows design that compensates for movement in any direction, reducing stress on pipe anchors and supports. Ideal for confined spaces and retrofit projects, these pre-assembled units simplify installation while providing long-term vibration isolation and flexibility.

Precision metal components for industrial equipment and manufacturing solutions.

308/311 Series
Expansion Joints

Proven, multi-ply stainless steel expansion joints designed for industrial, chemical, and HVAC service. The 308 and 311 Series accommodate axial and lateral motion with excellent pressure containment, offering standard and custom lengths, end fittings, and materials for versatile system integration.

externally pressurized expansion joints overview image

Externally Pressurized
Expansion Joints

Built for high-pressure and long-movement applications, Flex-Weld’s externally pressurized joints use an outer pressure shell to protect internal bellows from system media. This design ensures stable operation, minimal squirm, and extended fatigue life in high-temperature steam and power systems.

Seismic expansion joint with flange for building seismic safety and structural movement flexibility.

3150 Series Compact
Expansion Joints

A space-saving, lightweight design ideal for HVAC, OEM, and process equipment. The 3150 Series Compact Expansion Joint provides reliable movement absorption in short pipe runs, balancing performance and economy without sacrificing safety or service life.

bellows type pump connector overview image

Bellows Type
Pump Connector

Engineered for vibration isolation and thermal flexibility at pump inlets and discharges, Flex-Weld’s bellows type pump connectors protect equipment from misalignment, shock, and mechanical stress. Available with floating flanges or threaded ends for easy installation and maintenance.

Precision industrial mechanical couplings for optimized machinery performance.

Rubber Expansion Joints

Flexible elastomeric expansion joints designed to reduce noise, vibration, and thermal expansion in piping systems. Available in EPDM, Neoprene, and Nitrile for compatibility with a wide range of fluids, these joints provide a cost-effective solution for HVAC, water, and general industrial use.

pipe guides overview image

Pipe Guides

Precision pipe guides and anchors that control the direction of pipe movement and prevent buckling near expansion joints. Fabricated from heavy-gauge steel and available in multiple sizes, Flex-Weld pipe guides ensure proper system alignment and reliable expansion joint 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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