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blind flange selection

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CREAAM

CREAAM

Materials
Joined
Mar 7, 2013
Messages
9
Location
GB
Temporary Carbon Steel (CS) blinds without specified 625 overlay, were installed with 625/825 gaskets (as specified) and coated CS bolting (again as specified) at a 22Cr Duplex dead subsea tree with a threat of excessive sweet corrosion can it be said that either of the following blinding solutions will be suitable:

• 22Cr Duplex blind flanges in accordance with ASTM A182-F51.
• Alternatively CS blinds as per ASTM A350-LF2 or equivalent with the sealing area weld overlaid with Inconel 625.
 
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I would go with the ASTM A 182-F51 in this application.
 
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