ASTM G93 LEVEL C PDF

Contamination problems encountered in the use of enriched air, mixtures of oxygen with other gases, or any other oxidizing gas may be solved by the same cleaning procedures applicable to most metallic and nonmetallic materials and equipment. Cleaning examples for some specific materials, components, and equipment, and the cleaning methods for particular applications, are given in the appendixes. Furthermore, it does not propose specific ways to measure or monitor these levels from among the available methods. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

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Contamination problems encountered in the use of enriched air, mixtures of oxygen with other gases, or any other oxidizing gas may be solved by the same cleaning procedures applicable to most metallic and nonmetallic materials and equipment. Cleaning examples for some specific materials, components, and equipment, and the cleaning methods for particular applications, are given in the appendixes. Furthermore, it does not propose specific ways to measure or monitor these levels from among the available methods.

The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Federal, state, and local safety and disposal regulations concerning the particular hazardous materials, reagents, operations, and equipment being used should be reviewed by the user.

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Specifications

For certain applications, including in the petrochemical industry, extremely clean surfaces are required. Consider, for example, systems that work with high percentages of pure oxygen. This application requires that the presence of organic contamination such as oils and grease is kept to an absolute minimum. Particularly at elevated pressure, even the smallest traces can lead to spontaneous ignition. That is why this cleaning process is called UltraClean or oxygen-clean cleaning. After cleaning, we can determine the residue of organic material by means of a solvent extraction test.

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Oxygen Cleaning

Recently, updates were published for two important international standards that provide guidance and best practices for oxygen cleaning. Today the two standards have been harmonized to simplify standards internationally through CGA G This warning is prominently displayed on the gauge face because that component was precision cleaned for oxygen use , and it needs to stay clean for safe operation! When our engineers provide technical training on oxygen cleaning, the first thing they do is reference the fire triangle. Oxygen fires occur when three elements come together: a fuel , an oxidizer , and an ignition source. Simply put, contaminants are fuels that ignite easily in oxygen and burn vigorously.

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Ultra Clean cleaning (Oxygen clean)

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