Abstract
The main reasons for failure of welded joints in pipelines in hydrogen sulphide-containing oil and gas fields are discussed. A method is proposed for evaluating the potential risk of non-crack defects in the circumferential welded joints, based on the results of full-scale tests of pipes and theoretical calculations. The method can be used to determine the permissible working pressure and justify the further service of sections of pipelines containing defective welded joints.
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