Single-line drawings are always used to show pipe layouts for nominal pipe sizes of less than 12". This is a standard practice for all companies.

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Quizplus · Accepted Answer

Single-line drawings are a common method for representing pipe layouts, but their use is not limited by pipe size, nor is it a standard practice for all companies. Practices can vary based on company standards, project requirements, and the level of detail needed.

Single-Line Drawings Are Always Used to Show Pipe Layouts for Nominal