Sizing of the line is an important study and calls for a techno-economic analysis. The various parameters that affect line size are:
* Pressure: High pressure will reduce the pipe size, but will increase the pipe thickness
* Size of the pipe: The bigger the pipe, the higher the cost
* Thickness: Various factors affect the pipe thickness. E.g. Soil cover with the line having internal pressure/line in empty condition but having external soil pressure etc
* Pipe material
* Booster stations: How many booster stations will be there along the route? If the fluid pressure is low, the thickness decreases, but we need more booster stations and the reverse is the case if the fluid pressure is high
* Pipe fabrication: Manufactured pipe versus roll-and-weld pipe
* Buoyancy effect: Under-soil or underwater pipeline gets lifted up
On the ground - the seas are on the ground.
they live underground but they are able walk around above ground.
underground has soil or is wet and above ground is dry or grassy
under ground
Underground is an adverb, as in beneath the surface of the ground. It is an adjective, as in an underground car park
Copper is mined in pits ... which were underground at one point in time and are now above ground albeit at a lower elevation.
ground under you
Underground.
It grows above ground.
A pumpkin grows above the ground. A pumpkin grows above the ground.
No, its called the underground railroad because they were "hidden".
it produces by underground stem