Water flow measurement compliance in the Philippines – National Water Resources Board (NWRB) Resolution 08-0724
The National Water Resources Board in the Philippines had passed a resolution in 2024 for a requirement of regulating and monitoring water meters to be installed in places with granted discharge greater or equal to 10 litres per second. These measurements taken are to be transmitter via cellular technology to a secure data storage facility of NWRB.
In the power plants, one of the main issues is monitoring the water flow rate in large pipes that are almost 2 meters long in diameter.
Many of these large pipes were initially built without an inline flow meter installed. In this case, the best solution would be to install a clamp-on ultrasonic flow meter that will be able to measure the water flow rate inside the pipes without breaking the pipes or interrupting the process.
In one such case, we handle a seawater application running in a Carbon Steel pipe with wall thickness of 13mm and a pipe diameter of close to 2 meters. As there is very little straight run available on the pipe, we have to make do with a higher percentage of uncertainty or place additional probes to improve the data collected. The sensors are mounted directly facing each other (Z-method).
Ultraflux’s Uf801p (portable electronics) and Uf811 (fixed electronics) units work together with the Ultraflux SE1899 (clamp-on probe/sensor) for such a case and recorded a stable reading of between 20,000 to 22,000 m3/hr, matching the plant’s operational expectations and expected reading.
The Ultraflux unit proposed uses a 4-20mA output to the required telemetry systems providing real-time data monitoring.