STP1401: Stress Corrosion Cracking of Linepipe Steels in Near-Neutral pH Environment: A Review of the Effects of Stress

    Zheng, W
    Research scientists, CANMET/Materials Technology Laboratory, Ottawa, Ontario

    Sutherby, R
    Senior integrity specialist, TransCanada Transmission, Calgary, Alberta

    Revie, RW
    Research scientists, CANMET/Materials Technology Laboratory, Ottawa, Ontario

    Tyson, WR
    Research scientists, CANMET/Materials Technology Laboratory, Ottawa, Ontario

    Shen, G
    Research scientists, CANMET/Materials Technology Laboratory, Ottawa, Ontario

    Pages: 11    Published: Jan 2000


    Abstract

    Stress corrosion cracking (SCC), a form of environment-assisted cracking, has caused 24 major pipeline failures in the Canadian oil and gas pipeline system. The role of stress in the SCC of linepipe steels in near-neutral pH environment, as in other SCC systems, is complex. In this paper, the effects of stress on the development of both axial cracking and circumferential cracking are reviewed. The long-term beneficial effect of compressive stress introduced by hydrostatic testing is also discussed.

    Keywords:

    Pipeline SCC, local stress, nominal stress, pressure fluctuation, time rate of J, axial cracking, circumferential cracking, ground movement, low-temperature creep, hydrogen, hydrostatic test, crack retardation, compressive residual stress


    Paper ID: STP10238S

    Committee/Subcommittee: G01.06

    DOI: 10.1520/STP10238S


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