PD 7777:2000

Committees responsible
Foreword
Introduction
1 Scope
2 Normative references
3 Materials
4 Design and manufacture
Bibliography
Table 1 - Suitable steels
Table 2 - Longitudinal Charpy V-notch impact test
          requirements
Table 3 - Required nil-ductility transition
          temperatures and minimum test temperatures for
          no-break results
Table 4 - Dropweight specimen type
Figure 1- Schematic longitudinal section through HAZ
          dropweight test specimen with high Ni weld
          metal

Recommends an alternative basis of material selection for ferritic steels intended for use in low temperature storage tanks for storing refrigerated liquefied gases to that defined in BS 7777. Not applicable to refrigerated ammonia tanks where other factors that affect material selection to resist stress corrosion cracking could be at variance with recommendations of this Published Document.

This Published Document gives recommendations for an alternative basis of material selection for ferritic steels for use in low temperature storage tanks for the storage of refrigerated liquefied gases to that specified in BS 7777.

This Published Document does not apply to refrigerated ammonia tanks, since other factors affecting the material selection to resist stress corrosion cracking could be at variance with the recommendations of this Published Document.