How is internal heating indicated in a PID diagram?
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Hello everyone, how do I draw internal heat-tracing pipes in a PID process flow diagram, and how should pipes be represented? Thank you
The drawing of the jacket and steam tracing is as shown below~~
I know that about the external jacket and heat tracing. What I want to ask is about adding steam pipes inside the process pipeline, as well as internal heat tracing
Then draw the pipeline as a double line, with the heat exchange pipe inside it, indicated by a dashed line!
Internal heating is hardly used these days; those with such a need generally opt for jackets.
Generally, it is a steam heating coil inside the storage tank; I haven’t heard of steam used for heat tracing in pipelines. It must be a jacket or external steam heating, or perhaps a heat exchanger or heater.
Piping steam tracing can be represented by dashed lines, and the meaning of these dashed lines should be indicated in the legend. Additionally, when specifying the pipe number, the insulation type should be denoted with the code HW-50: HW stands for tracing, while 50 represents the thickness of the insulation. If you are not clear about this, please send a private message
Generally, no one wants to use internal heating elements either, as it’s troublesome to handle, and it’s difficult to locate the leak points once there is a leak； But the properties of the materials in our factory are special; sometimes, when the flow rate is low, the coating tends to solidify, so internal heating is chosen.