With many older pipelines encapsulated by sleeves, it is important that the nitrogen does not leak out and so the sleeves must be regularly checked to ensure that they are maintaining the correct pressure. Refilling sleeves is highly labour-intensive so, if the gas is leaking, the operator can monitor the pressure drop and schedule maintenance accordingly.
MERLIN Pipeline Sleeve monitors allow the pipeline operator to check that the sleeve is maintaining the required pressure without undertaking a site visit. They are typically installed in remote areas inside GRP Cabinets, M28 Posts and at Sleeve Fill Points. Remotely monitoring these key points eliminates routine site visits and labour can be freed for data interpretation and follow up.
Now the pipeline operator can check that the sleeve is maintaining the required pressure without undertaking a site visit. Even if the gas is leaking, the operator can monitor the pressure drop and schedule maintenance accordingly. In this way unnecessary site visits can be avoided.
The MERLIN measures the sleeve pressure automatically, checks that it is within specification and reports immediately if an alarm threshold is exceeded.
In addition to monitoring the gas pressure in the sleeve, the voltage of the batteries powering the sensor is also monitored and data is seamlessly sent in a management report to the system HQ where it is displayed and archived in Abriox’s MERLIN CPSM software or online via iCPSM.
Two types of sleeve monitor are available; the MERLIN Nitrogen Sleeve Monitor which fits inside an plastic post or kiosk and the MERLIN Communications Module with Nitrogen Sleeve Adaptor which fits inside a M28 or alternative sleeve fill point.