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Mitigation Of Flange Face Corrosion During Plant Construction

Product Number: 51321-16742-SG
Author: Takahiro Tsuda; Nozomi Satake; Manabu Itoki
Publication Date: 2021
$0.00
$20.00
$20.00

In a recent modular construction project, severe corrosion of the gasket contact surfaces of flange
faces was found to have occurred after the flanges had been tightened. Root-cause analysis indicated
that there is a greater chance of water ingress in tightened flanges in modular construction than in stickbuilt
construction and that the longer construction period in the former can result in the severe corrosion
of flange faces observed. Therefore, in order to mitigate or prevent such corrosion in modular
construction, countermeasures should be taken. In this paper, two means of mitigating or preventing
flange face corrosion in tightened flanges (i.e., a rust preventive coating and a special spiral wound
gasket) were tested, and these tests confirmed their effectiveness.

In a recent modular construction project, severe corrosion of the gasket contact surfaces of flange
faces was found to have occurred after the flanges had been tightened. Root-cause analysis indicated
that there is a greater chance of water ingress in tightened flanges in modular construction than in stickbuilt
construction and that the longer construction period in the former can result in the severe corrosion
of flange faces observed. Therefore, in order to mitigate or prevent such corrosion in modular
construction, countermeasures should be taken. In this paper, two means of mitigating or preventing
flange face corrosion in tightened flanges (i.e., a rust preventive coating and a special spiral wound
gasket) were tested, and these tests confirmed their effectiveness.

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