How large should the valves be drawn on the pipe section layout diagram?
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For the valves on the pipe section layout diagram, what size should the pipe section fittings be drawn at?
The dimensions of the valve legend are generally 4 mm in length and 2 mm in width, or 6 mm in length and 3 mm in width (per 9.0.4 of HG20519-2009)
Valves play an important role in process piping diagrams, and the graphical representation methods for various types of valves are generally provided in the \"Chemical Process Design Manual\". Its size is generally sufficient as long as it can be clearly recognized. If it is an installation piping diagram, it is best to use graphic symbols in actual size, as this facilitates the counting of pipelines.