STP880: Designing to Prevent Corrosion of Metals Under Insulation

    Mettam, CT
    Senior piping engineer, Lummus Crest Inc., Bloomfield, NJ

    Pages: 10    Published: Jan 1985


    The paper concentrates on the corrosion of carbon steel under insulation. Austenitic steel corrosion is also mentioned. Hot and cold insulation materials are discussed with the main consideration place on “cold” problems. The current solution of the problem is to paint all carbon steel that is to be insulated and operating between -1 and 121°C. Insulation material and thickness is then selected. A moisture barrier or a vapor barrier is added to protect the insulation. Additional deterents added are vapor stops and contraction/expansion joints. A European versus an American design is examined as a conclusion. An Appendix, including protective coatings used, and drawings for additional clarification are included.


    corrosion, insulation, permeability, urethane, coatings (under insulation)

    Paper ID: STP39167S

    Committee/Subcommittee: G01.05

    DOI: 10.1520/STP39167S

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