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Corrosion Resistance of AISI 316 (UNS S31600) Stainless Steel at Near Deaerated-Seawater Systems under Stagnant and Dynamic Flow Conditions

Product Number: 51323-19283-SG

Author: Gustavo Brandolin, Matheus Biava, Nathalia Mota, Daiana Souza, Gabriela Souza, Rodrigo Landim, Luis Rodrigues, Arthur Azevedo, Javier Velasco

Publication Date: 2023

$20.00

UNS S31600 is usually selected for pipes to be applied under conditions where cleanliness is an essential factor. As the lines around Sulfate Removal Unit (SRU) have this requirement (considering the membranes sensibility to any debris), it is common to find this alloy as the preferred one in the material selection criteria for systems like this in Floating Production Storage and Offloading units (FPSO) where the deaerator tower is upstream the SRU, with the role to limit the oxygen content up to 10 ppb in the seawater.

Although the selection of UNS S31600 agrees with ISO 21457 and NORSOK M-001 for this part of seawater treatment system (Figure 1), in 2019 several pits were noticed at pipes downstream the SRU in a FPSO being operated at Brazil Santos basin.

Products tagged with 'dynamic flow'

Corrosion Resistance of AISI 316 (UNS S31600) Stainless Steel at Near Deaerated-Seawater Systems under Stagnant and Dynamic Flow Conditions

Association for Materials Protection and Performance