API 583 Corrosion Under Insulation and Fireproofing
Scope
This recommended practice (RP) covers the design* maintenance* inspection* and mitigation practices to address
external corrosion under insulation (CUI) and corrosion under fireproofing (CUF). The document discusses the external
corrosion of carbon and low alloy steels under insulation and fireproofing and the external chloride stress corrosion
*****ing (ECSCC) of austenitic and duplex stainless steels under insulation. The document does not cover atmospheric
corrosion or corrosion at uninsulated pipe supports but does discuss corrosion at insulated pipe supports.
delines for risk assessment of equipment or structural steel subject to CUI and CUF damage.
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