Duplex Stainless Steel Pipes for Offshore and Subsea Applications
Date:2025-03-13View:156Tags:ssaw pipe supplier,cold drawn seamless tube,steel pipe wholesale
Duplex stainless steels (2205, 2507) offer superior strength and corrosion resistance in harsh subsea environments, making them ideal for offshore oil and gas pipelines.
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High Pitting Resistance Equivalent Number (PREN ≥ 35): Duplex stainless steels outperform 316L in seawater environments due to high chromium, molybdenum, and nitrogen content.
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High Strength, Reduced Weight: 2205 duplex steel has a yield strength twice that of 316L, allowing for thinner walls and weight savings in subsea pipelines.
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Welding Challenges: Duplex steels require ER2209 filler metal to maintain the correct ferrite-to-austenite phase balance, and heat input must be strictly controlled to avoid sigma phase formation.
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