Pressure Tubing Explained

As HVAC professionals, understanding the various components of a system is crucial for effective design, installation, and maintenance. One often overlooked yet significant component in this domain is pressure tubing. In this blog, we will delve into the specifics of pressure tubing, focusing on its definition, materials, and applications.

What is Pressure Tubing?

Pressure tubing is a practical designation for seamless steel tubing with an outside diameter of less than 1.5 inches (37 mm). This type of tubing is primarily used in systems where fluids or gases are conveyed under pressure.

ASTM A106 Pressure Tubing

In steam plant design—where high temperatures and pressures are common—ASTM A106 steel pressure tubing is a go-to choice. This specification covers seamless carbon steel pipe for high-temperature service, making it ideal for use in both industrial and HVAC applications requiring robustness and durability.

Materials: More than Just Steel

While steel is a popular material used in pressure tubing, HVAC professionals should also consider options in plastic materials. Various plastics are designed to convey fluids under pressure, providing lightweight and corrosion-resistant alternatives for certain applications. The choice between metal and plastic tubing depends on several factors, including temperature, pressure, chemical compatibility, and installation environment.

Applications of Pressure Tubing in HVAC

Pressure tubing finds its applications across a broad spectrum of HVAC systems:

• Steam Distribution Systems: Use of ASTM A106 tubing for delivering steam in heating processes.
• Chilled Water Systems: Conveying chilled water under pressure to air handling units.
• Refrigeration Lines: Connecting components within refrigeration systems effectively.
• Hydronic Heating: Moving heated water through radiators and underfloor heating systems.

Conclusion

In summary, pressure tubing is a vital part of HVAC systems that should not be overlooked. Whether you are utilizing seamless steel tubing or exploring plastic alternatives, understanding the specifications such as ASTM A106 and the operational parameters will help you make informed decisions that enhance system reliability and efficiency.

Equipping yourself with knowledge about pressure tubing is essential for any HVAC professional looking to improve their design and installation practices. Remember, the right choice in tubing can lead to a more efficient and durable system.