A350 and super duplex

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posted
17 years ago

Fri, Oct 20, 2006 7:25 PM

I have been offered needle valves with A350 body, for OS&Y bolting, supplier suggests super duplex bolts instead of L7.

Will it represent galvanic corrosion problems ?

Thank you,

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posted
17 years ago

Fri, Oct 20, 2006 7:27 PM

These are 1" needle valve, A350 LF2 body

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posted
17 years ago

Thu, Nov 16, 2006 4:06 PM

IMHO, minor - the super duplex needle stem is cathodic with respect to the A350 valve body (anode) - the valve body has the larger surface area - same area effect as seen in the use of brass valves in domestic water service with A53 steel pipes. BTW - the properties of the fluid that valve control will constitute the dominate corrosion mechanism(s).

Ed Vojcak

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posted
17 years ago

Wed, Dec 6, 2006 3:23 PM

Thank you Ed,

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