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Material Selection for Deepwater Gate Valves
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Material selection is an important step during the design process of an object. The goal is to produce an object to meet the requirement with minimum cost. During the recent years with discovery of oil and gas in deep water, oil and gas industry facing new challenges of handling corrosive material in seabed that gives more importance and criticality to material selection of equipment for this kind of application. Hydrogen sulfide (H2S), chloride and carbon dioxide (CO2) have made the big challenges for material that handle corrosive fluids in the seabed.This report presents a brief review of material selection for two parts of deepwater gate valve, Body and Gate. It is mostly focused on mechanical properties and required corrosion resistance. Ferritic alloys with low PRE numbers and low mechanical properties and also austenitic alloys with low yield strength are not a proper option for this case. Alloy 2205 is the most common stainless steel which is used in deep water gate valve production. There are other alloys in duplex group that show better mechanical and chemical properties than alloy 2205 but because of their high expense are not used by industries.

Place, publisher, year, edition, pages
2013. , 32 p.
Keyword [en]
Gate Valve, Corrosion, Austenitic, Lean Duplex Steel, Duplex Stainless Steel
National Category
Other Materials Engineering
URN: urn:nbn:se:kth:diva-170023OAI: diva2:826882
Subject / course
Materials Science and Engineering
Educational program
Master of Science - Materials Science and Engineering
Available from: 2015-06-26 Created: 2015-06-26 Last updated: 2015-06-26Bibliographically approved

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Dana Seresht, Mahmoudreza
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