Oil Drilling Product Processing Case: F22 75K+625(NiCrMo-3)
This case involves the advanced corrosion-resistant overlay cladding of a subsea Christmas tree body, a core component in offshore oilfield production systems. The base material, F22 75K high-strength alloy steel, is internally clad with Inconel 625 (NiCrMo-3) to meet the extreme performance requirements of high-pressure, high-temperature (HPHT) and sour service environments.
Oil Drilling Product Processing Case: F22 75K+625(NiCrMo-3)
Through precision-controlled GTAW/PAW cladding, a dense and uniform Inconel 625 layer is applied to the internal surfaces, ensuring excellent protection against CO₂, H₂S, and chloride-induced corrosion. The process ensures low dilution, strong metallurgical bonding, and high surface integrity—critical for long-term reliability in deepwater applications.
Key Features:
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Base material: F22 75K, suitable for high-pressure subsea applications
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CRA layer: Inconel 625, offering outstanding corrosion resistance
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Applied to the internal bore, seal areas, and connection zones of the Christmas tree body
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Used in offshore subsea oil & gas fields, particularly in aggressive and corrosive wells
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Compliant with API 6A and NACE MR0175 standards
FNS provides subsea equipment processing solutions tailored for the most demanding offshore energy environments.
