Hydrostatic drain in a burried pipe
Hydrostatic drain in a burried pipe
(OP)
I have a piping system that is above ground in which Hydrotest is going to be performed. At a particular location it goes underground and comes above ground after a certain span. In this location where it goes underground, it makes a low point that calls for a hydrostatic drain. But it is going to be fully burried. How will the the drain valve in this underground location be operated? If I do not provide a drain valve here, how will the water be drained after hydrotest?





RE: Hydrostatic drain in a burried pipe
RE: Hydrostatic drain in a burried pipe
Regards
StoneCold
RE: Hydrostatic drain in a burried pipe
RE: Hydrostatic drain in a burried pipe
I hate Windowz 8!!!!
RE: Hydrostatic drain in a burried pipe
- install a plug in the low point and dig a small hole around it, hydrotest, remove plug and drain into ground / bucket then plug and backfill
- install a small tee or vent close to the elbow for the buried section big enough to insert a tube and then suck out the water
- blow air through at high velocity (10m/sec +) until it stops spraying water then de-water by blowing super dry air or vacuum dry if you need the pipe water free
Buried drain lines / plugs are not a great idea as they often corrode or leak after a few years.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Hydrostatic drain in a burried pipe
Chances are you won't need it again after construction.
RE: Hydrostatic drain in a burried pipe
And I am also hearing that you never provide drain valve in an underground piping system if you do not have a culvert.
I am looking for knowledge about the general practice of hydrotesting of underground lines (line is above ground, goes underground for a few meters and then comes above ground).
RE: Hydrostatic drain in a burried pipe
I've often seen a spool piece or access tee incorporated above ground so that you can insert a suction tube and suck most of the water out (similar to what you would get if you just drained it)
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Hydrostatic drain in a burried pipe
Hydrotesting underground piping after backfilling is ridiculous. Imagine having a leak, and now having to remove all the backfill now to find the source.
RE: Hydrostatic drain in a burried pipe
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way