Nitrogen Services :: High volume nitrogen purging High volume nitrogen pumping has many uses, from purging and displacing product in pipelines, to plant shutdown operations, where A. Hak’s pump units are used to supplement the on-site nitrogen supply to reduce the turnaround time. Frequently, during turnarounds, the on-site nitrogen supply is critical to the de-commissioning of the plant, but is restricted due to the low flow or low pressure available from the air separation plant or site vaporisers. By supplementing the on-site supply, using A. Hak’s mobile nitrogen units with capabilities of 25.000 Nm3 per hour, the turnaround time can be enormously reduced. Working together with the gas (nitrogen) suppliers, A. Hak coordinates shutdown purging and displacement activities to ensure a continuous operation and gas free environment prior commencement of mechanical works. The same principle applies during the plant start-up operation, A.Hak’s units are frequently used for pressure testing, drying, purging and leak testing operations.