Pressure is a parameter measured in many different applications. Starting with the chimney draught as well as the finest pressure determination, pressure measurement serves to adjust gas burners or check pressings. For all these applications as well as for the 4 Pa Test (see page 33), ecom-instruments offer suitable solutions.
Pipe test according to TRGI will also be achieved by pressure measurements, thus using the right „measuring equipment“: The technical regulations for gas installations (TRGI) are binding and important for the concerned crafts.
According to TRGI gas pipes must be checked along the different stages of their installation. This also applies for renovation and maintenance of buildings:
During the building shell phase a loading test is performed. The gas pipes material strength and the stability of the connections are checked before plastering or coverage. A 1000 hPa test pressure is then applied to the new installed pipes – without fittings and gas appliances, air or an inert gas serving hereby as test medium. The pressure should not drop during 10 minutes. The pressure meter must have a resolution of at least 0.1 hPa.
The tightness check is applied to test the tightness of the pipes and fittings without the gas appliances being installed. The pressure has to keep stable during 10 minutes testing time (depending on the facility volume) this by a test pressure of 150 hPa. Also in this application the pressure meter must have a minimum resolution of 0.1 hPa.
The final examination is performed with a visual check.
In „normal“ operation the usability test is done with the purpose of tracking down possible leakages. The gas loss in a pipe can be determined in litre per hour by the instrumentation. Besides -of course- absolute tightness conditions, a loss of less than one litre per hour is still within tolerance and the new installation will be certified an unrestricted usability qualification. Between one and five litres loss means a reduced usability capacity. Further operation is then allowed over a repair time limited to four weeks. Subsequently the full tightness must be verified applying the tightness check. At a loss of five litres or more, the gas pipe will be locked as unsuitable for usability.
For all tests in connection with the TRGI directives, the ecom pressure check kit (DPK) offers the suitable instrumentation including the necessary accessories.
|Chimney draught measurement||x||-||o||o||x|
|Finest pressure measurement||x||-||-||-||x|
|Gas burner adjustment
(flow, facility, idle and nozzle pressure)
|4 Pa Test||-||-||-||-||x|
|Online data logging||-||-||x||x||-|
|2nd pressure sensor for parallel measurement||-||-||o||o||-|