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A182 F53 2507 special flange Super Duplex SAF 2507 flanges

The flanges could also be manufactured as screwed, threaded or forged types. The forged flanges are made from a single piece of raw material. These are also called the cast flanges.

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ASTM A182 F53 equates to UNS S32750. With an increased chromium content compared with F51 it offers improved pitting corrosion resistance. Super Duplex UNS S32750 /F53 Flanges are made from a super duplex stainless steel grade that has 24% chromium, 3% molybdenum, 6% nickel and carbon, manganese, silicon, sulfur, phosphorus, nitrogen and iron in the composition. Super Duplex valves and their use. With a 25% Cromium component, super duplex valves are designed to withstand seawater corrosion and other intergranular corrosion and pitting.

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