The key to successful sealing of the DISS connection is the extremely smooth finish of the sealing surfaces. These surfaces must be protected to maintain high leak integrity.

DISS接头成功密封的关键是密封表面的极端平滑。必须保护这些表面，以维持高度密封性。

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Oxygen is the second largest component of the atmosphere, comprising 20.8% by volume.

氧是空气的第二大组成成分，体积占20.8%。

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Gaseous oxygen is colorless, odorless, tasteless, and nonflammable.

气态氧无色，无嗅，无味，不可燃。

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Oxygen is necessary to support life. It is a strong oxidizer that combines readily with many elements to form an oxide and is necessary to support combustion.

氧是维持生命的必要元素。氧是一种强氧化剂，很容易同许多元素反应，生成氧化物。氧还是维持燃烧的必需品。

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Oxygen will react with nearly all organic materials and metals.

氧几乎同所有的有机材料和金属发生反应。

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Materials that burn easily in air will burn more vigorously in oxygen.

在空气中容易燃烧的材料在氧气中会燃烧的更加剧烈。

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Equipment used in oxygen service must meet stringent cleaning requirements; any system must be constructed of materials that have high ignition temperatures and which are nonreactive with oxygen under the service conditions.

氧气设施中使用的设备必须满足严格的清洁要求;系统必须采用具有高点火温度且在使用条件下同氧不反应的材料建造。

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Vessels should be manufactured to American Society of Mechanical Engineers (ASME)codes and designed to withstand the temperatures and pressures involved.

容器的制造要满足美国机械工程师协会(ASME)的标准，容器的设计要使之能经受住有关的温度和压力。

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Oxygen is produced by an air separation unit(ASU)through the liquefaction of atmospheric air and separation of the oxygen by continuous cryogenic distillation.

氧的生产使用空气分离装置(ASU)，通过大气的液化和连续低温蒸馏分离出氧。

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The oxygen is then removed and stored as a cryogenic liquid. Oxygen can also be produced noncryogenically using selective adsorption processes to produce gaseous product.

随后，氧以低温液体的状态搬运和储存。氧的生产还可以不采用低温的方法，而是采用选择性吸附过程来生产气体产物。

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Air is compressed and sent through a clean-up system where moisture, carbon dioxide, and hydrocarbons are removed.

空气通过一个去除了水蒸汽、二氧化碳和碳氢化合物的清洁系统压缩和输运。

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The air then passes through heat exchangers where it is cooled to cryogenic temperature.

接着空气通过热交换器冷却到低温。

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Next, the air enters a high pressure distillation column where it is physically separated into a vaporous form of nitrogen at the top of the column and a liquid form of “crude” oxygen (~90% O2)at the bottom.

随后空气进入高压分裂蒸馏塔，分离成氮蒸气和“原始”液氧(含大约90%的氧)，氮蒸气在蒸馏塔顶部，液氧在蒸馏塔底部。

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This crude oxygen liquid is withdrawn from the column and sent to a low-pressure column where it is distilled until it meets commercial specifications. The liquid oxygen is sent to a cryogenic storage tank.

接着从蒸馏塔取出原始液氧，送到一个低压塔，在这里继续蒸馏,直到满足商业技术规范。最后液氧送到低温储存罐储存。

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Noncryogenic methods of air separation contain some of the same unit processes such as compression and clean-up, but differ in the fundamental technology to separate air into its components.

非低温空气分离方法使用一些同样的单元过程，如压缩和清洁，但在把空气分解成它的组成成分的基本技术上是不同的。

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Oxygen can be separated from nitrogen using Pressure/Vacuum Swing Adsorption (PSA/VSA)technology.

使用压力/真空旋转吸附(PSA/VSA)技术可以把氧和氮分离开。

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Adsorption relies on a material (zeolite)that has the property of selectively adsorbing nitrogen while under a slight pressure and allowing oxygen to pass through.

吸附依赖于一种材料(沸石)，该材料具有在微小的压力下选择性吸收氮而允许氧通过的性质。

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The adsorbed nitrogen is released from the zeolite by dropping the pressure to a lower level (often under vacuum)during the PSA/VSA process.

在PSA/VSA过程中，通过把压力降到更低的水平(通常在真空之下)，可以把吸附的氮从沸石中释放出来。

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When oxygen is produced by adsorption, argon flows through with the oxygen, producing oxygen with a purity range of 90-95%.

用吸附法生产氧时，让氩同氧一起流通，可以生产出纯度在90%到95%范围内的氧。

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Oxygen is commonly relied upon in health and medical applications. Liquid oxygen is used as an oxidant for liquid fuels in the propellant systems of missiles and rockets..

在健康和医疗应用上，氧是必不可少的。在导弹和火箭的推进系统中氧用作液体燃料的氧化剂。

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