Which type of construction is commonly used for tubes in high pressure service?

In high-pressure service applications, seamless construction is commonly employed for tubes due to its strength and integrity. Seamless tubes are manufactured without any joints or welds, which significantly reduces the likelihood of weak points that could fail under high pressures. This construction method allows for a uniform structure throughout the tube, minimizing the risk of leaks or ruptures in high-stress environments.

Seamless tubes are often made from materials that can withstand high pressures, and the absence of weld seams means there is no risk of weld-related defects. This provides a significant advantage in applications such as refrigeration systems, where maintaining high levels of pressure is essential for system efficiency and safety.

Other construction types, such as resistance welded, lap welded, and fin-tube designs, may not offer the same reliability under high-pressure conditions. Welded constructions can introduce weaknesses or potential failure points due to the stresses that welding can create, and fin-tube designs focus on increasing surface area for heat exchange rather than pressure handling capabilities. Therefore, seamless construction is the preferred choice for high-pressure service scenarios.