Expansion Joints
SEMCOR is the Midwest’s premier supplier of expansion joints by Resistoflex®, Hose Master and Proco. We have a large inventory of products in stock and ready to ship out to clients in St. Louis and throughout Missouri, Illinois, Indiana, Kentucky and Iowa. When you work with us, you are working with a company that has more than a century of experience providing piping, fittings and related solutions for fluid and material handling.
We have carefully selected our inventory to offer only reliable products from manufacturers we know and trust. Whatever you need, you can count on our sales engineers to deliver expert advice and creative problem solving solutions.
PTFE-Lined Expansion Joints
Resistoflex PTFE-lined expansion joints are available in 2-, 3- and 5-convoluted configurations. Featuring a contour-molded PTFE lining that is highly resistant to both temperature and corrosive chemicals, Resistoflex expansion joints are engineered to provide seamless longitudinal movement without misalignment, angular deflection or vibration. A patented process locks the lining into the joint itself, minimizing the effects of thermal expansion without compromising tensile strength or flexibility.
All Resistoflex PTFE-lined products are extensively tested to ensure they deliver the performance expected of them in the most demanding applications. Contact SEMCOR directly for detailed specifications and more information about product options and modifications.
Metal Expansion Joints
SEMCOR also supplies metal expansion joints by Hose Master, and Penflex. Multiple sizes and configurations are available, including banded bellow end connections for slipping over pipe and welding components, and various liner options. All Hose Master products are manufactured in an ISO 9000 facility for enhanced quality assurance and production to the highest tolerances.
Metal expansion joints are ideal for use in pipelines and industrial machinery. SEMCOR can help you assess your needs and match you with the best metal expansion joint at a price that’s right for your budget.
Industrial Rubber Expansion Joints
Proco plastic and rubber expansion joints can be found in a number of different products and industries, including HVAC equipment, waste and water processing, power generation and chemical manufacturing. Rubber expansion joints can be used to absorb vibration and minimize movement, improve thermal stability and reduce overall strain on your liquid handling systems. Proco products are extremely durable and long-lasting, making them an economical choice for these and other applications.
System Design Factors and Application Matching
Expansion joints play a key role in protecting piping systems from movement, vibration, and thermal changes. Beyond selecting the correct material type, facilities often evaluate system layout, operating pressures, media compatibility, and expected movement ranges before finalizing a design. SEMCOR supports these decisions by helping teams understand how joint geometry, convolution count, and reinforcement options influence long term performance. This guidance is especially valuable for operations that manage corrosive media, elevated temperatures, or frequent cycling. By reviewing these factors early, facilities can reduce stress on connected equipment and maintain consistent flow conditions across their process lines.
Installation Planning and Alignment Considerations
Proper installation is essential for expansion joint performance. Misalignment, improper anchoring, or insufficient guiding can introduce additional forces that shorten service life. SEMCOR assists customers in evaluating installation conditions such as pipe alignment, anchor placement, and movement direction to help ensure that each joint performs as intended. This support helps teams avoid common issues such as overextension, torsional loading, or uneven compression. With the right planning, facilities can achieve smoother operation and reduce the likelihood of premature wear.
Lifecycle Management and Maintenance Strategies
Expansion joints operate in environments where temperature fluctuations, vibration, and pressure changes occur regularly. SEMCOR helps customers develop maintenance strategies that include inspection intervals, visual checks for deformation, and monitoring of adjacent supports. Understanding how joints behave over time allows teams to schedule service proactively and maintain consistent system performance. This approach supports better budgeting, fewer unexpected shutdowns, and improved equipment longevity across fluid handling systems.
Frequently Asked Questions
What Factors Influence Expansion Joint Selection?
Media type, temperature range, pressure rating, movement requirements, and installation layout all play a role in determining the right expansion joint.
How Can Facilities Extend the Life of Expansion Joints?
Regular inspections, proper alignment, correct anchoring, and monitoring of system movement help maintain long term performance.
Can Expansion Joints Be Customized for Unique Applications?
Yes. Expansion joints can be tailored through material selection, convolution design, reinforcement options, and end connection configurations.
Does SEMCOR Assist with Installation Planning and Application Review?
SEMCOR provides guidance during the selection and planning process to help ensure that expansion joints align with operational requirements and system design.
For a complete list of available products, or for more information about choosing the right type of expansion joint for your project, contact SEMCOR today.