|pipeline = surge_tank|
|A tank designed to absorb water hammer power in a pipeline on valve closing or emergency stops|
|Group: Man made|
|Used on these elements|
|Tools for this tag|
A surge tank is designed to absorb excessive water hammer power in a pipeline on valve closing or emergency stops.
Depending on the upstream pipeline's length and diameter, such a tank can be pretty huge shafts like 200m of depth and 20m of diameter - often found in the middle of nowhere.
How to map
As a strategic function of a pipeline system, often near the valve that could cause a water hammer, we map them as nodes with pipeline=surge_tank, like pipeline=valve.
Despite such tanks can be huge shafts or chimneys, pipeline=surge_tank should be used on a pipeline node located at the tank's place.
Surge tanks may be hazardous places: depending on the hammer force to disperse, particularly during emergency stops, water may rise over the shaft/chimney and overflow around.
Stay away from them, never ever fall inside.
Always pay attention to directions and warnings to remain safe during surveys.
|pipeline||surge_tank||It's a pipeline surge tank||mandatory|
|location||<tank location>||Location of the surge tank. Can be outdoor, underground||recommended|
|diameter||<tank diameter>||The internal diameter of the tank||optional|
|height||<tank height>||The internal height of the tank, from the pipeline axis to the very top||optional|
|ele||<tank bottom elevation>||The bottom elevation of the tank||optional|
|capacity||<tank capacity> m3||The capacity of the tank, if applicable||optional|
|operator||<surge tank operator>||Name of the company operating the surge tank||optional|
|--||A chimney is installed above the pipeline it is supposed to protect|
|--||Here is an underground shaft acting as a surge tank for a penstock located 170 metres below. The shaft outlet is about 18 metres wide|