PD 7777:2000

This standard PD 7777:2000 Alternative steel selection and its effect on design and testing of tanks to BS 7777 is classified in these ICS categories:

• 77.140.30 Steels for pressure purposes
• 23.020.40 Cryogenic vessels

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.