Which of the following types of joints requires no sealing?

Continuously welded joints are designed to provide a smooth and uninterrupted bond between two components, creating a strong and durable connection. Since these joints are integrated through the welding process, they inherently eliminate the need for additional sealing. The continuous nature of the weld fills any gaps that might otherwise require sealing in other types of joints. This makes continuously welded joints a preferred choice in applications where integrity and tightness are critical, such as in pressure vessels or piping systems.

Other joint types may require sealing to ensure that they are airtight or watertight. This is particularly important for loose or unfinished joints, where there might be gaps or spaces that allow for leakage. Connected joints often rely on gaskets or sealants to maintain their effectiveness in preventing leaks. Hence, continuously welded joints stand out as they achieve a sealed condition through the welding process itself, rendering additional sealing unnecessary.