Válvulas de encaixe duplex
Os aços inoxidáveis duplex são chamados de “duplex” porque têm uma microestrutura bifásica que consiste em grãos de aço inoxidável ferrítico e austenítico.
Resistência: Os aços inoxidáveis duplex são cerca de duas vezes mais resistentes do que os aços inoxidáveis austeníticos ou ferríticos normais.
As válvulas super duplex são utilizadas em muitas indústrias, como a petroquímica, o equipamento químico, o processamento alimentar, o petróleo e o gás.
Descrição
Corrosion Resistance Of Duplex Plug Valves
As with all stainless steel, corrosion resistance depends mostly on the composition of the stainless steel. For chloride pitting and crevice corrosion resistance, their chromium, molybdenum, and nitrogen content are most important. Duplex stainless steel grades have a range of corrosion resistance, similar to the range for austenitic stainless steels, i.e from Type 304 or 316 (e.g. LDX 2101©) to 6% molybdenum (e.g. SAF 2507©) stainless steels.
The Cost Of Duplex Plug Valves
Duplex stainless steels have lower nickel and molybdenum contents than their austenitic counterparts of similar corrosion resistance. Due to the lower alloying content, duplex stainless steels can be lower in cost, especially in times of high alloy surcharges. Additionally, it may often be possible to reduce the section thickness of duplex stainless steel, due to its increased yield strength compared to austenitic stainless steel. The combination can lead to significant cost and weight savings compared to a solution in austenitic stainless steel.
Duplex Plug Valves applications
Duplex valves are versatile and can be used in various applications where reliable and efficient flow control is required, for example: chemical processing, oil and gas pipelines, water treatment, power generation and so on.
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