Regarding the symbol representation in PI&D diagrams

2026-02-28View Original

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I would like to ask: in PI&D diagrams, for example, a pressure transmitter is represented by PT with a circle around it, and PI is represented by a square with circles and horizontal lines around it. So how is an electric valve represented?

Reply #22026-03-01

Give it a like! Collection of [Illustrated Code for the Layout Design of Petrochemical Plants SH/T 3011-2011] https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5714376 (Source: Haichuan Chemical Industry Forum (Hua Haichuan Liu hcbbs))

Reply #32026-03-06

In different companies, the legends and codes may vary slightly

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Regarding the symbol representation in PI&D diagrams

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