1. API 1104 (2007) Welding of pipelines and related facilities, 20th edition amended July 2007. American Petroleum Institute, Washington DC
2. DNV-OS-F101 (2010) Submarine pipeline systems. Det Norske Veritas, Norway
3. BS 7910:2005 (incorporating Amendment No.1) (2007) Guide to methods for assessing the acceptability of flaws in metallic structures. British Standards, London
4. DNV-RP-F108 (2006) Fracture control for pipeline installation methods introducing cyclic plastic strain. Det Norske Veritas, Norway
5. Isabel Hadley, Progress Towards the Revision of BS 7910 (2011) Proceedings of the Pressure Vessels and Piping Division Conference, PVP2011-57307, Baltimore, USA, July