Potable Water Network 1

[Che koul]

Good engineering practice dictates that the water network in a power plant used for kitchen, toilets, safety showers and eye-wash stations shall be separated from water networks connected to processes or lines under pressure conveying different fluids (eg waste under pressure, or chemicals) to avoid contamination of the "clean water network" described above.
Is there any standard describing a relevant requirement?

 

[pennpiper]

T K 83,

From the dictionary:
potable
[poh-tuh-buh l]
adjective - fit or suitable for drinking:

Isn't that enough?

Sometimes its possible to do all the right things and still get bad results

 

[PEDARRIN2]

Plumbing Code will dictate this separation. In the 2015 International Plumbing Code, it is Section 608.

 

[EdStainless]

In addition to plumbing codes, there is NSF and AWWA both have guides for potable water systems.

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P.E. Metallurgy, Plymouth Tube

 

[LittleInch]

The "common sense" standard?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[bimr]

If you are on municipal water, the municipality or State usually has a cross-connection control and backflow prevention regulation.

example - cross-connection control and backflow prevention regulation

State example - cross-connection control and backflow prevention regulation

Don't believe there is a regulation for a private water system. For private water systems, the guideline would fall under good engineering practice to keep the systems separate.

 

[dhengr]

"Common sense" and “good engineering practice to keep the systems separate” are no loner good enough. It seems that today most people, including the AHJ if there is one, many times want a code paragraph which explicitly addresses your exact problem, in convoluted detail, or it can’t be done. Just look at many of the OP’s here on E-Tips these days…, give me a code para. for this issue, a textbook which explains the exact problem in every detail, can you share a worked out example, ‘which I can copy,’ goes unsaid. There isn’t a lot of common sense, good engineering thinking and judgement or good engineering practice going on these days, on much of what is being called engineering, it’s just follow the cookbook and crunch the numbers, never mind how or why it works or should be that way.

 

[EdStainless]

Little things like only using the correct metallurgy, installing vacuum breakers/backflow preventers and details like that.

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P.E. Metallurgy, Plymouth Tube

 

[bimr]

There are many areas that still require good engineering practice. For example, EPA regulations that protect public drinking water systems do not apply to private sources. And one can't assume that the AHJ if there is one, knows what is required. In addition, if the community has not formally adopted a particular Code, the Code is not in effect in that community.

If you review some of the chemical plant disasters that have occurred in Texas, you notice a fervor for deregulation. Where regulations no longer exist, one is required to use good engineering practice.

Texas

 

[Che koul]

The reference to a standard most of the times acts as a shortcut to the arguments list when a team is participating in a project.
I think that, that's the reason why too many people ask for a reference to a standard and it is not matter of copying a case etc.
Anyway, thanks for the answers.

The system is hydraulically separated from the municipal network.