In a Plant Line Trace sketch, what is primarily shown?

In a Plant Line Trace sketch, the primary focus is on illustrating only the major features of the process. This level of detail is essential for simplifying the overall representation of the plant's layout and operation, allowing for easier comprehension at a glance. Major features typically include key components like major equipment, important connections, and the general flow of the process.

This approach enables engineers and technicians to quickly understand the plant's configuration without getting bogged down by excessive detail. It is particularly useful during the preliminary stages of design or analysis, where understanding the broader context is more critical than pinpointing every single valve or pipe size.

While other aspects like all valves, all process flows, or pipe sizes are important in detailed engineering drawings or specifications, they are not the primary focus in a Plant Line Trace sketch. This distinction helps ensure clarity and emphasizes the essential elements that define the plant's operations and processes.