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What does the isosceles trapezoid symbol represent on the process flow diagram?

2010-12-15View Original

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What does the isosceles trapezoid symbol represent on the process flow diagram? This symbol is often seen on the liquid ammonia output pipelines
Reply #22010-12-15
Reducer, also known as elbow
Reply #32010-12-15
Reducer, also known as elbow
Reply #42010-12-15
Concentric reducers, also known as tees, are the parts where the diameter of a pipe changes; other pipes are labeled in the same way
Reply #52010-12-16
Concentric reducers, also known as tees.
Reply #62010-12-16
A right trapezoid represents eccentric reducers, while an isosceles trapezoid represents concentric reducers.
Reply #72010-12-16
Isosceles trapezoids feature concentric diameter changes, while non-isosceles trapezoids, usually right trapezoids, have eccentric diameter changes; everyone is welcome to share different opinions
Reply #82010-12-16
It seems everyone is wrong; it should be an ammonia compressor.
Reply #92010-12-16
It doesn’t seem right. I checked the actual device today; it’s located in the piping of the synthetic cycle machine. There’s a cylindrical device on the pipeline for adding liquid ammonia – is that a filter?

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