Usability (gas technology)
In gas technology, serviceability or determination of serviceability means to determine a possible leak in a gas line. To do this, it is necessary to determine the leakage of a gas line, which can be done by measurement or calculation.
Leakage measuring devices are required for measurement, which electronically determine the amount of gas lost in l / h. Then the following classification applies:
| Leakage in l / h | Usability |
|---|---|
| 0 | tight lines, mandatory for new systems. |
| smaller 1 | Unlimited usability |
| 1 to less than 5 | Reduced usability. The line can remain in operation for four weeks, but it must be repaired during this time. The repair is deemed to have been completed with a main test in which the tightness must be determined. |
| from 5 |
No usability. The gas line is immediately blocked by the GVU or a contractor until it is repaired. |
If there are several gas lines next to each other, for example in a (ventilated) shaft, the leakage quantities are to be added and the total value is to be used for assessment according to the table.