Liquid air is air that has been cooled to very low temperatures (cryogenic temperatures), so that it has condensed into a pale blue mobile liquid.[1] To thermally insulate it from room temperature, it is stored in specialized containers (vacuum insulated flasks are often used). Liquid air can absorb heat rapidly and revert to its gaseous state. It is often used for condensing other substances into liquid and/or solidifying them, and as an industrial source of nitrogen, oxygen, argon, and other inert gases through a process called air separation.
Liquid air has a density of approximately 870 kg/m3 (870 g/L; 0.87 g/cm3). The density of a given air sample varies depending on the composition of that sample (e.g. humidity & CO2 concentration). Since dry gaseous air contains approximately 78% nitrogen, 21% oxygen, and 1% argon, the density of liquid air at standard composition is calculated by the percentage of the components and their respective liquid densities (see liquid nitrogen and liquid oxygen). Although air contains trace amounts of carbon dioxide (about 0.03%), carbon dioxide solidifies from the gas phase without passing through the intermediate liquid phase, and hence will not be present in liquid air at pressures less than 5.1 atm (520 kPa).
The boiling point of liquid air is −194.35 °C (78.80 K; −317.83 °F), intermediate between the boiling points of liquid nitrogen and liquid oxygen. However, it can be difficult to keep at a stable temperature as the liquid boils, since the nitrogen will boil off first, leaving the mixture oxygen-rich and changing the boiling point. This may also occur in some circumstances due to the liquid air condensing oxygen out of the atmosphere.[2]: 36
Liquid air freezes at approximately 58 K (−215.2 °C; −355.3 °F), also at standard atmospheric pressure.[citation needed]
Used for store Liquid Gases during the operation
Use this type for moving Liquid Gases to customer site Or to the storage tanks
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The ISO Tank Container, also known as the UN portable tank, tank container, Isotainer, tanktainer, bulk storage container, shipping tank, or intermodal tank, is used for the transportation and storage of hazardous and non-hazardous chemicals, foodstuffs, and liquefied gases.
In the 1960s containers became the preferred way of moving goods around the world. The appeal was that every container conformed to sizes defined by the International Standards Organization (ISO), 40’ x 8’ x 8’6” or 20’ x 8’ x 8’6”. (See Wiki article). Before long, the concept of fitting a stainless-steel cylinder inside the standard 20’ frame was adopted and the ISO Tank was born. ISO Tanks became the standard for the transportation of liquids (including fuel), chemicals, gases, powders, and even some types of food, around the world.
Steve Darnell, the founder of Qualitank, began work for Trafpac in the 1970s. (Trafpac was one the first ISO Tank companies in the world.) Before long he was running his own tank repair business, and, over time, moved into the sale and hire of used ISO Tanks. Qualitank Services was incorporated in 1992.
An ISO Tank Container (sometimes called ‘Tanktainer’) is a stainless-steel cylindrical vessel, usually made of 316 grade stainless steel, fixed to a mild steel frame, usually welded. The thickness of this container will vary depending on the purpose of the tank and will be rated for a specific working pressure. Beyond that, there are a bewildering array of variants.
Tanks are generally designed for a specific purpose or product and therefore there is no fixed construction that applies to all tanks. Because the product to be carried may heavy (have a specific gravity that restricts the volume that can be carried) and because there are limits to the weight that a loaded ISO Tank can be, the capacity of tanks varies greatly, typically from 21,000 Litres up to 27,000 Litres in a standard sized frame. (Smaller capacities will likely be in a smaller frame – 8′ high rather than 8’6″) Capacities beyond this are possible by extending the tank length so it sits outside of the standard frame and these tanks are known as ‘Swap Bodies’. Swap Body tank capacities can exceed 34,000 Litres.
Microbulk systems are available for oxygen, nitrogen, argon, carbon dioxide, nitrous oxide (N2O), LNG & in high pressure, high flow applications including laser cutting, metal processing & fabrication, precision welding, laboratory & research, medical oxygen, food & beverage packaging/preservation, electronics manufacture & testing, & inert purging & blanketing.
Allowing small and medium volume users to enjoy the benefits of onsite gas delivery, Perma-CylMicrobulk Storage Systems provide reliable, efficient, and economical solutions for liquid nitrogen, oxygen, argon, CO2, N2O and LNG.
Designed to replace high pressure gas cylinders, Perma-Cyl tanks eliminate:
waste and expense of full for empty gas cylinders
cylinder changeovers
residual gas losses
lost or damaged cylinders
cylinder inventory management
manual handling injuries
We offer a wide range of liquid nitrogen dewars and dry shippers to meet all sample sizes and shipping durations and provide the safest way to store and transport cryo-preserved therapeutic products and research samples.
Coupled with innovative monitoring solutions, we help you create cryogenics transport systems that that ensure the quality of contents upon arrival. We also supply racking systems to protective gear, dewar flasks and accessories for the storage and handling of liquid nitrogen to make using our cryogenic storage devices more safe, convenient, and efficient.
Liquid Oxygène Dewar–Liquid Nitrogène Dewar –Liquid Argon Dewar
Liquid Co2 Dewar –Liquid Helium Dewar
