1. PD6493: 1980, Guidance on some methods for the derivation of acceptance levels for defects in fusion welded joints,1980
2. Assessment of the integrity of structures containing defects - Revision 3;Milne,1987
3. PD6493: 1991. Guidance on methods for assessing the acceptability of flaws in fusion welded structures,1991
4. Appraisal of PD6493: 1991 fracture assessment procedures, Part I: TWI data;Challenger;TWI Report 7158. 1/93/762.02,1993
5. Challenger, N.V., Phaal, R. and Garwood, S.J. Appraisal of PD6493: 1991 fracture assessment procedures, Part II: Published and additional TWI data: TWI Report, to be published.