STP672: Evaluation of Steels for Arctic Line Pipe

    Abrams, H
    Research engineers, Bethlehem Steel Corporation, Bethlehem, Pa.

    Roe, GJ
    Research engineers, Bethlehem Steel Corporation, Bethlehem, Pa.

    Pages: 32    Published: Jan 1979


    Abstract

    Line pipe for transporting gas from Arctic fields is subjected to the conditions of an extremely hostile environment. Bethlehem Steel has been conducting an extensive program to evaluate the materials and processes that can produce the property requirements for Arctic-grade line pipe. In the course of the program, several alloy combinations were evaluated. The paper describes each of these, but concentrates on the vanadium-columbium (V-Cb) alloy grade, which we feel is the most practical and economical to produce. The critical aspects, from steelmaking to plate rolling and testing, are described. A regression analysis correlation of chemistry and processing to microstructure and properties is presented. This correlation permits the prediction of plate and pipe properties on the basis of the chemistry and processing. The dependence of properties on a number of specific microstructural features is illustrated by metallographic studies.

    Keywords:

    steels, microstructure, microalloys, controlled rolling, regression analysis, line pipe


    Paper ID: STP36865S

    Committee/Subcommittee: E04.05

    DOI: 10.1520/STP36865S


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