Abstract: This paper discusses the mathematical and mechanical models for the creep of metal materials and their application under high temperature conditions in the engineering design of petrochemical plants, gives the creep curves of materials, studies the Maxwell model, Kelvin model and Maxwell-kelvin model, and presents the stress analysis methods and evaluation standards for high temperature creep pipelines

Key words: Creep limit, Rupture strength and plasticity, Constitutive relation, Stress analysis