STP1259: New Materials and Forgings Used for Pressure Vessels Operating in Hydrogen Environment

    Bocquet, P
    Research Scientists, Centre de Recherche des Matériaux du Creusot, Creusot-Loire Industrie, Le Creusot,

    Cheviet, A
    Product Manager, Creusot-Loire Industrie, Rive de Gier,

    Coudreuse, L
    Research Scientists, Centre de Recherche des Matériaux du Creusot, Creusot-Loire Industrie, Le Creusot,

    Dumont, R
    Creusot-Loire Industrie, Le Creusot,

    Pages: 15    Published: Jan 1997


    Abstract

    To improve the in-service behaviour of Cr Mo (V) steel grades used for the pressure vessels operating in hydrogen environment at high temperature for the oil industry, the manufacture of heavy forgings needs a high quality. Improvement of the standard and enhanced strength (ASME Case 1960) 2 l/4 Cr 1 Mo steel grades may be achieved by reducing drastically the impurities (S, P, X, etc…) to extra low level and avoiding segregates at the inner surface of the shells. For high temperature operation, new V modified steel grades are proposed (ASME case 1961, Code Case 1973 and Code Case 2098). Their conventional mechanical properties are similar to those of enhanced strength 2 1/4 Cr 1 Mo but they offer higher creep properties and improved resistance to hydrogen damage.

    Keywords:

    hydrogen damage, pressure vessel, Cr Mo (V) steels, high temperature, embrittlement


    Paper ID: STP16589S

    Committee/Subcommittee: A01.06

    DOI: 10.1520/STP16589S


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