HOT TAPPING
HOT TAPPING
(OP)
Hello friends,
Can anyone give some tips? I have an 8" carbon steel under ground gas line to be hot tapped with a branch size 8". My questions :
1. Underground hottapping is it possible?
2. What precautions necessary to have this underground hottapping?
Can anyone give some tips? I have an 8" carbon steel under ground gas line to be hot tapped with a branch size 8". My questions :
1. Underground hottapping is it possible?
2. What precautions necessary to have this underground hottapping?





RE: HOT TAPPING
It is usually required to reduce the pipeline's pressure and flow, depending on product, pressures, temperatures and flowrates, the pipeline's configuration and actual connection geometry.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: HOT TAPPING
I would think to do this you would need to excavate, pour a concrete containment box and add an opening to run the new line that you are tapping for. Then an access door to get to the valve for future line work and a ladder.
RE: HOT TAPPING
I am aware of the other things you have mentioned regarding flow, pressure. I hope these calculations are same as above ground piping except when calculating external pressure the soil pressure may required to be added.
Mizzoueng, Thanks for the reply. Is it the actual method they follow for u/g hottapping? Looks to be very tedious.
RE: HOT TAPPING
There are other ways to hot tap underground and you will not need a valve or concrete containment box.You can install a tee piece in the line,however this would probably work out just as expensive as a valve controlled hot tap.
Cheers
BB
RE: HOT TAPPING
Its unusual to have to install a vault simply for a hot tap, but I wouldn't say you won't have to. Depends on where the hot tap will be located. Under a city street, yes, you'll have to do something.
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: HOT TAPPING
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/