topic Re: The Dualistic Nature of Devices in Gas and Pipeline Questions

The Dualistic Nature of Devices

MarkCederholm — Thu, 23 Jul 2020 12:16:04 GMT

This is a Gas UPDM issue. We have a great number of CP test points connected to valves, and this has stumped me. I can create a new terminal configuration, but there are times when a device acts as a device, and times when it merely acts as a junction, depending on the subnet tier. I invite Esri and the Gas Utility Community to analyze this situation.

Re: The Dualistic Nature of Devices

MikeMillerGIS — Thu, 23 Jul 2020 12:42:25 GMT

Mark,

Can you explain the problem some more? Are you looking to connect the Test Point to the valve via a Test Lead Wire? I just looked we are missing that rule from the model, but makes sense to allow it. That valve will need a value of Traceable in the Cathodic Protection Traceability field so it is not a barrier to the CP network. This can be set via the material or the override field. The test lead wire has a category of CP Only, which is a barrier to the gas network, so the test point is not included in the gas system.

Re: The Dualistic Nature of Devices

MarkCederholm — Thu, 23 Jul 2020 16:56:30 GMT

If I create a rule for test lead wire to valve, there must be a reference to terminals. Those terminals are occupied elsewhere.

Re: The Dualistic Nature of Devices

MarkCederholm — Thu, 23 Jul 2020 17:02:32 GMT

It just occurred to me that it may be possible for more than one line feature to be assigned to a valve terminal. If that's the case, then there may not be a problem after all. I'll look into that possibility after my latest round of experiments, which take considerable time.

Re: The Dualistic Nature of Devices

MarkCederholm — Thu, 23 Jul 2020 19:24:42 GMT

Well here I go thinking myself around a catnip mouse again. Even if I can attach a test lead wire to a controllable valve in a pipe network, what happens if the valve is closed to gas? It should still be able to trace for conductivity. That's where the "cptraceability" field comes in, I guess. I need to do some more playing around with this.

Re: The Dualistic Nature of Devices

MikeMillerGIS — Thu, 23 Jul 2020 19:30:33 GMT

Great Question. You can close the valve and the CP network does not care. The DeviceStatus Network Attribute is not used in the subnetwork definition for CP.

Re: The Dualistic Nature of Devices

MarkCederholm — Wed, 29 Jul 2020 22:14:58 GMT

Yes, I verified that I can have a pipe and test lead wire connected to the same terminal of a controlling device.