Foundation settlement - Pressure Vessels

[ivani1]

Does any of the API inspection code of pressure vessels /heat exchangers calls for foundation settlement check? If yes, by what means? To perform some survey with recorded readings?

[arcpro]

No there is no mandatory /listed requirement in API 510 pressure vessel inspection code to actually perform a settlement survey. In case of storage tanks, applying API 653 yes, it is applicable that settlement survey is performed.

[ivani1]

Alright, what are the requirements mentioned in API 653? Is there any particular frequency mentioned to perform settlement survey?