4-1/2 Inch 13Cr Welded Stainless Casing
4-1/2 inch 13Cr (13% chromium) welded stainless steel casing for corrosive CO2 environments in enhanced oil recovery wells. Welded with low-hydrogen processes for toughness. HTS 7306.21.40.00 for other welded stainless steel oil/gas casing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If duplex or super austenitic seamless versions
Advanced seamless stainless alloys for drilling have dedicated statistical suffixes.
If other welded steel, not stainless, for drilling
Carbon or low-alloy welded casing uses different material-based headings.
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Import Tips & Compliance
• Submit PREN (Pitting Resistance Equivalent Number) values for Cr/Mo/Ni content verification
• Coordinate with CBP for advance ruling on duplex stainless grades
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