Fill \ seal-
Filling gases such as nitrogen and carbon dioxide are commonly used as protective gases to prevent fire or explosion in storage tanks and containers containing flammable liquids or solids. In addition, the filling gas maintains a dry, inert environment to prevent corrosion of the cleaned pipes and vessels.
Whether your fired heater, furnace body or pipeline is dirty, or new pipeline needs cleaning, we can provide a complete set of cleaning and drying services according to the specific conditions of each project, and determine which one can meet the cleaning requirements through engineering analysis. And dew point specification and the most cost-effective way.
SANDJET ® service is one of our most commonly used methods for internal cleaning of flame heaters and pipes. The SANDJET service uses high-speed nitrogen-propelled harmless cleaning materials and is often considered the fastest method of cleaning.
When the catalyst is contaminated, the reactor operating at high temperature must be cooled. The Praxair Nicool ® reactor provides two cooling methods.
One-pass cooling is suitable for any reactor. The cooling gas enters the reactor and removes heat from the catalyst, thereby achieving safe removal of the catalyst. If an appropriate cycle compressor can be used, liquid nitrogen controlled by Praxair's proprietary system can be directly injected to cool the cycle gas, thereby cooling the catalyst. The nitrogen consumption when using this system is only one-third that without a recirculation compressor.
When the pipeline is deactivated due to maintenance, product conversion or recycling, Praxair nitrogen-assisted replacement devices provide a low-cost, safe and fast way to remove pipeline products. An inert environment that removes residual product and keeps the pipeline dry in one step. Whether the pipeline transports natural gas, crude oil, gasoline, diesel, liquefied petroleum gas, ethylene or other liquids or gases, Praxair can always ensure the most efficient replacement through detailed analysis of the overall pipeline conditions and project conditions.
"Complete Drying Service" is a complete problem solution for drying process systems. When using a nitrogen drying process system, our mobile nitrogen pump delivers nitrogen at high flow rates (up to 600,000 standard cubic feet per hour), pressure (up to 6000 psi), and temperature (up to 600 ° F, or 315.6 ° C). This powerful performance, combined with a nitrogen dew point of -90 ° F (-67.8 ° C), effectively removes moisture from the process system, helping customers save time and money.
Complementing the nitrogen pumping service, Praxair's "Dry Air Service" provides an alternative to drying process systems. This service delivers 100% oil-free air through multi-bed dehumidifier dryers at dew point levels down to -90 ° F (-67.8 ° C). Each unit has a flow rate of approximately 75,000 standard cubic feet per hour, and multiple units can be used if necessary. Each unit has a gas delivery pressure of up to 125 psi and removes moisture by entrainment. All equipment is started, operated and maintained by our company's staff. The drying process can reduce or even eliminate the need for customer site staff to participate.
When the pipeline is damaged, not only air leakage will occur, but also profit and production efficiency will be affected. Therefore, Praxair provides a complete set of accurate and reliable technologies and services to meet customers' business needs and budget requirements, and is backed by the best experience and reputation in the industry.
TracerTight ® leak detection system is suitable for a variety of applications including above-ground storage tanks (AST), underground storage tanks (UST) and underground pipelines. The Tracer Tight system is one of the most accurate and sensitive leak detection and localization technologies on the market today. It can locate leaks to within a few feet, even exceeding the US Environmental Protection Agency ’s requirements for precision testing of underground storage tanks
Praxair has also developed the SeeperTrace SM pipeline leak detection service for long-distance pipelines, which is one of the only rapid and efficient locating technologies for pipeline leaks in the liquid, gas or multi-phase products. This technology detects leak rates of 1 gallon per day without interrupting service or digging.
Finally, Praxair's HeliTec ® leak detection service quickly locates leaks in buried pipelines and inspects factory pipelines and systems. The principle of this method is to add a tracer helium gas to the gas (usually nitrogen), while using a more sensitive helium detector. After the normal fluid is removed from the pipeline, the pipeline is pressurized with test gas, and then the presence of helium in the air above the pipeline is detected using a helium detector.
Newly installed pipes and vessels often require verification of mechanical integrity before use. Existing vessels and pipelines can use similar tests as part of an asset integrity program or for re-rating under higher pressure conditions. To meet these needs, we provide both pneumatic and hydraulic test methods. .
For existing pipelines and pipelines, we will also add a tracer to the gas or water, and quickly and accurately locate the leak through the SeeperTrace SM leak detection service, repair the leak and complete the test without causing costly engineering delays.
We use nitrogen to safely remove fuel and air mixtures that are at risk of explosion from containers, transfer lines and equipment.
Temporary supply of nitrogen, oxygen and hydrogen-
When customers' current industrial gas supply cannot meet temporary high flow, pressure or temperature requirements, or when gas supply services are interrupted due to air pump, vaporizer, transportation and pipeline trailer operations, we can help you meet temporary gas demand.