Trunk Sewers and Water Mains
Trunk Sewers and Water Mains
(OP)
I recently received a phone call from a recruiting agency. They are looking for someone specifically familiar with trunk sewers and water main design. I have some experience in designing water mains, sanitary and storm sewers for subdivisions. So What makes trunk sewers and water mains different? I understand that size could be one factor. What else shall we have to take into account when designing trunk sewers and water mains? Thanks a lot!





RE: Trunk Sewers and Water Mains
You may very well have the required expertise; the recruiting agency people are just parroting some written material.
RE: Trunk Sewers and Water Mains
RE: Trunk Sewers and Water Mains
Only one of them carries a potable liquid, so interconnection is not a good idea.
RE: Trunk Sewers and Water Mains
Sewers typically flow half full in underground pipelines with clean-outs and manholes appropriately spaced. If a force main, then calcs have to be run to verify flow rates to insure no stagnation and nothing becomes cementitious.
Water lines focus more on limits of 1500 gpm flow within a network between several hydrants, depending upon network topology. Also water lines might not be fire protection lines. Depends upon the situation.
RE: Trunk Sewers and Water Mains
RE: Trunk Sewers and Water Mains
Concrete is generally not used for any type of water main. steel and iron are far more commonly used. and concrete would not be my first choice for a trunk sewer due to corrosion issues.
RE: Trunk Sewers and Water Mains
You also have issues with fittings. You generally want to stay away from gate valves on larger lines. You also have availability of parts in different sizes.
Basically, the difference isn't with the "label" of trunk, main, lateral or so forth (unless specified by the jurisdiction). The difference really comes from the flow requirement and all that is dictated by the same. Apart from that, if you've designed some water lines, you've designed some water lines.
There is, however, quite a difference between individual unit (house, office, other building) piping vs system piping. The principles are the same. But the application, fittings, pieces, etc. are different.
Althalus
RE: Trunk Sewers and Water Mains
I don't think there is different between trunk sewers and water mains, And If there is different between them then that was inflicted.
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HSE Engineer LNG
IHI engineering and construction
RE: Trunk Sewers and Water Mains