FAQs - Oxygen Cleaning Services
  • According to CGA & ASTM, what are the major causes of Oxygen fires?
  • What is involved in cleaning a component for Oxygen Service?
  • Which primary Codes/ Standards cover specifications for Oxygen Cleaning?
  • Who may perform Oxygen Cleaning?
  • Why must components used in Oxygen Systems be cleaned?
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    Q: According to CGA & ASTM, what are the major causes of Oxygen fires?
    A:
    1. System Design Errors
    2. Using the Wrong Metals
    3. Using the Wrong Non-Metallic Materials
    4. Dirty Systems
    5. Unsafe Operating Practices

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    Q: What is involved in cleaning a component for Oxygen Service?
    A: Cleaning a component or system for oxygen service involves the removal of contaminants including the surface residue from manufacturing; hot work, and assembly operations, as well as the removal of all cleaning agents and the prevention of recontamination before final assembly, installation, and use. These cleaning agents and contaminants include solvents, acids, alkalis, thread lubricants, filings, dirt, scale, slag, weld splatter, organic material (such as oil, grease, crayon, and paint), lint, and other foreign materials.
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    Q: Which primary Codes/ Standards cover specifications for Oxygen Cleaning?
    A: Compressed Gas Association (CGA G-4.1)
    American Society for Testing and Materials (ASTM G-93)

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    Q: Who may perform Oxygen Cleaning?
    A: An individual skilled in the techniques required for oxygen service cleaning shall be responsible for monitoring the cleaning operation and for determining if a component or system is clean so that it can function safely in an oxygen environment. Where piping systems with multiple branches are involved, it is of paramount importance that the cleaning procedures be well established, suitably integrated with the sequence of construction operations, and precisely followed since it might be neither practical nor possible to completely inspect such a system for cleanliness after construction and final cleaning.
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    Q: Why must components used in Oxygen Systems be cleaned?
    A: Oxygen equipment and systems including all components and parts thereof SHALL be adequately cleaned to remove harmful contamination prior to the introduction of oxygen. Harmful contamination includes both organic and inorganic material such as oils, greases, paper, fiber, rags, wood, coal dust, solvents, weld slag, rust, sand, and dirt, which if not removed could cause a combustion reaction in an oxygen atmosphere or result in an unacceptable product purity.
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