Fiber-reinforced plastic (FRP) and dual-laminate piping systems are most commonly used in non-critical process services. Because of their perceived simplicity and lower risk, these systems often receive less engineering attention during the design phase. Unfortunately, this oversight – especially when FRP piping is designed using conventional steel piping practices – can lead to premature failure. Indeed, 41% of all FRP piping failures can be attributed in some part to poorly considered pipe support design.
The Importance of Proper Pipe Support Design
Unlike steel, FRP is a non-ductile material with only one-tenth the stiffness of carbon steel. This fundamental difference means that FRP piping requires specialized support systems to ensure long-term performance and reliability.
Key Characteristics of Effective FRP Pipe Supports
To properly support FRP piping, the following design considerations are essential:
- Snug Fit: Supports must fit tightly around the pipe, leaving no gaps or space in the clamp.
- Increased Bearing Area: FRP supports need a larger bearing surface than those used for steel piping.
- High Stiffness: Supports must be rigid enough to prevent flexure, which can compromise the integrity of the pipe.
- Elastomer-Lined Clamps: Clamps should be lined with an elastomer to insulate the pipe from the steel clamp. This also helps accommodate pipes with irregular outer diameters.
It’s important to note that FRP piping should never rest directly on steel structures, and U-bolts alone are not suitable as pipe supports for FRP systems.
Avoiding Common Pitfalls
Using steel piping support standards for FRP systems is a common mistake that can significantly reduce the lifespan of the piping. Investing in properly engineered supports tailored to FRP’s unique properties is critical to avoiding costly failures.
Learn More
For examples of properly designed FRP pipe supports, refer to the Maverick Pipe Support Catalog, 6th Edition, available on our website. If you have questions or need guidance on your piping system, don’t hesitate to give us a call—we’re here to help.