Which of the following is not a way metallic liners are attached to the base metal?

The attachment methods for metallic liners to base metals are crucial for ensuring the structural integrity and performance of pressure vessels. Welding is a common technique that creates a strong, permanent bond between the liner and the base metal. Bolting provides a way to mechanically secure the liner, allowing for disassembly when necessary, and is often used in applications where maintenance and inspection are important. Soldering, while less common than welding and bolting, can also be used to attach liners where a lower melting point bonding method is acceptable.

In contrast, using pressurized methods for attaching metallic liners is not standard practice. Pressurization does not provide a physical means of attachment but rather implies utilizing pressure to hold components in place, which can result in separation or failure under operating conditions. Therefore, the assertion that pressurized methods are a way of attachment is not accurate, making it the correct answer to this query about how metallic liners are typically secured to base metals. Understanding these attachment methods is essential for effective inspection and maintenance practices outlined in API 572 RP.