1. Nakoneczny GJ. Life assessment of high temperature headers. American power conference, Illinois, USA; 1995.
2. User handbook, ABAQUS 6.4-4, ABAQUS Inc.; 2004.
3. Steam, its generation and use;Babcock & Wilcox Co.,1992
4. British Standard Institution, BS7910:1999. Guide on methods for assessing the acceptability of flaws in metallic structures; 1999.
5. API 579. Fitness for service. API recommended practice 579, 1st ed. January 2000.