You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    Measurements of Oxygen-Enrichment in Foam Insulation for Liquid Nitrogen Pipelines

    Published: 0

      Format Pages Price  
    PDF (156K) 10 $25   ADD TO CART
    Complete Source PDF (7.4M) 415 $59   ADD TO CART

    Cite this document

    X Add email address send
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    Oxygen-enrichment in foam insulation for liquid-nitrogen transfer lines constitutes a potential fire hazard. Measurements of oxygen levels inside two types of foam insulated systems have been earried out. Samples of gas were taken from the innermost part of the foam by means of a syringe, and then transferred to an oxygen sensitive, chemical cell. Oxygen levels above 30 % were detected shortly after start of warming-up in one system. The oxygen percentage decreased at a rate that was dependent on how well the insulation was ventilated through seams etc. A long range effect of oxygen-enrichment can be expected in systems that have been running for some years. A substantial part of the foam will then be affected due to diffusion of oxygen-rich gas into the cells of the foam in combination with a large number of open cells as a result of the thermal cyclings.


    oxygen-enrichment, foam insulation, liquid nitrogen, transfer line, fire hazard

    Author Information:

    Hokkanen, CV
    project manager, AGA AB Innovation, Lidingö,

    Committee/Subcommittee: G04.02

    DOI: 10.1520/STP24941S