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07262 Factors Affecting Gasket Selection for Stainless Steels in Seawater

Picture for 07262 Factors Affecting Gasket Selection for Stainless Steels in Seawater
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Product Number: 51300-07262-SG
ISBN: 07262 2007 CP
Author: Roger Francis and Glenn Byrne
Publication Date: 2007
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High alloy stainless steels, such as superduplex and 6%Mo, have been extensively used for seawater cooling systems and in reverse osmosis desalination plants. From time to time corrosion has been observed at flange faces that is not attributable to poor quality material or excessively severe operating conditions. Over the last fifteen years there have been studies looking at corrosion of flanged joints. Some have investigated flange materials, while others have looked at different gasket materials. The present paper reviews the published data and presents some field experience from the authors’ company. These are combined to present some recommendations on combinations to be avoided and the best choice of suitable gaskets for systems operating at different pressures.
High alloy stainless steels, such as superduplex and 6%Mo, have been extensively used for seawater cooling systems and in reverse osmosis desalination plants. From time to time corrosion has been observed at flange faces that is not attributable to poor quality material or excessively severe operating conditions. Over the last fifteen years there have been studies looking at corrosion of flanged joints. Some have investigated flange materials, while others have looked at different gasket materials. The present paper reviews the published data and presents some field experience from the authors’ company. These are combined to present some recommendations on combinations to be avoided and the best choice of suitable gaskets for systems operating at different pressures.
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Available cast austenitic and duplex stainless steel grades and their castability and corrosion resistance. The conclusion is that superduplex stainless steel offers the best combination of properties for seawater cooling and firewater pumps.

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