High-Temperature Performance of Welded Steel Pipes
Date:2025-03-15
In applications involving extreme temperatures, welded steel pipes need to maintain their mechanical properties and corrosion resistance.
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Heat-Affected Zone (HAZ) Control: Controlled welding parameters prevent excessive grain growth in the heat-affected zone, which could compromise the strength and toughness of welded pipes in high-temperature applications.
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Post-Weld Heat Treatment (PWHT): After welding, PWHT is often employed to relieve residual stresses and enhance the creep resistance of welded pipes used in power plants or boilers.
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Alloy Selection: Nickel alloys (Inconel, Incoloy) and chrome-moly steels are commonly used for welded pipes that need to withstand continuous temperatures over 550°C, especially in refinery and petrochemical processes.
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