Hilliard Emission Controls, Inc. / PURGIT

Ammonia and LP Gas Flaring Service


PURGIT has the equipment to safely degas pressure vessels and pipelines anywhere in the country. Using an open flare with specially designed tips we can burn vapors from storage tanks, pipelines, rail cars, tank trucks, tank barges, ships, and various other pressure vessels. PURGIT has completed many tank decontamination and conditioning jobs – lists and references available upon request.


Here are some photos of our equipment from past ammonia and LP jobs:
Large pressure vessels and pipelines are usually degassed as part of routine maintenance so they can be opened for inspection. PURGIT has been tapped for many dozens of pressure vessel decommissioning and re-commissioning across the country. PURGIT has extensive experience with anhydrous ammonia. This cargo is hygroscopic and introducing water into the tank too early in the cleaning phase can be detrimental to tank integrity. The addition of water to an ammonia tank can create heat and a strong vacuum that can cause the tank to implode. Flaring the gas until a very low level of organic gases are present in the tank is the standard technique for decommissioning.


Re-commissioning: Once the tank inspection is completed, the tanks are filled with nitrogen gas to remove air and moisture. The tank can be tested at this time for leaks.Then liquid or gaseous cargo is introduced into the vessel to condition the tanks. The liquid cargo flashes in the tank diluting the nitrogen and pushing it to the flare. The flaring continues until the nitrogen levels are low enough for the tank compressors to operate successfully.


This is a PURGIT mobile flare in travel mode. This photo was taken as we were about to depart on a job. PURGIT equipment is ready to go on short notice.


Burning ammonia and other gases with low heat value may require supplemental fuel. Natural gas or propane must be added to bring the BTU/ft3 up to proper levels for good combustion. PURGIT uses vaporizers like this one to supply the propane vapor necessary for the gas-assist flare to maintain compliance.

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