Method for calculating the operating life of a steam pipe with a creep-fatigue crack near a weld joint

Abstract

A method for determining the period of sub-critical growth of a semielliptical creep-fatigue crack in the internal surface of a pipe wall of the steam pipeline is proposed. The crack is located near the ring weld in the field of residual stresses in the heat-affected zone. The dependence of the residual resource of the pipe of a steam pipeline with the weld joint on the location of the centre of the crack relative to the axis of the weld is ascertained.

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Keywords

welded joint, steam pipeline, creep-fatigue crack, residual resource, period of subcritical growth of the crack

Citation

Dolinska I. Method for calculating the operating life of a steam pipe with a creep-fatigue crack near a weld joint / Iryna Dolinska, Roman Palash // Ukrainian Journal of Mechanical Engineering and Materials Science. — Lviv : Lviv Politechnic Publishing House, 2018. — Vol 4. — No 1. — P. 21–28.

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