双相钢材料氢致应力开裂风险评估

Hydrogen Induced Stress Cracking Risk Assessment for Duplex Stainless Steel

随着海洋油气开发逐渐从浅海走向深海,水下生产系统的开发模式也越来越多地被应用于深海油气资源开发中。对于水下生产系统,双相不锈钢材料因其较好的性价比而被广泛应用,但双相不锈钢材料本身对于氢致应力开裂(HISC)具有一定的敏感性,因此在实际的工程项目中应合理设计并评估氢致应力开裂风险。本文主要针对氢致应力开裂发生的原因、设计应考虑的因素、详细设计要点和如何进行HISC评估分析进行了介绍,可用于指导水下生产系统中双相不锈钢材料的设计、HISC评估和施工建造。

Subsea production system model is increasingly used in the deep water oil and gas development as offshore oil development is growing from the offhsore to the deep.For subsea production system,duplex stainless steel is widely used because of its good cost-effective performance.However the duplex stainless steel is susceptible to hydrogen induced stress cracking(HISC),so the suitable design and risk assessment of hydrogen induced stress cracking shoud be consedered in the actual project.This paper is focused on the hydrogen induced stress cracking causes,the design philosophy,the detail design consideration and how to assess the HISC risk.It can be used to guide the design,HISC assessment and construction of duplex stainless steel in subsea production system.