9-5/8 inch 43.5 lb/ft SM25Cr-125 Stainless Casing
SM25Cr-125 super martensitic stainless steel casing (244.5 mm OD, 16.2 mm wall thickness) for ultra-HPHT gas wells, seamless API 5CT PSL2. Fits HTS 7304.24.4020 as stainless steel, <215.9 mm OD casing with ≥12.7 mm wall, providing 125 KSI collapse resistance. Used in geothermal and high CO2 environments.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If thin wall version <12.7 mm for same alloy and diameter
Wall thickness statistical break determines 7304.24.10 vs 7304.24.40.
If duplex stainless but imported as loose couplings for field assembly
Separate couplings/flanges classified as other threaded stainless articles.
If pre-assembled with valve manifolds for wellhead use
Complete valve assemblies shift to Chapter 84 machinery classification.
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Import Tips & Compliance
• Super martensitic grades require special hardness and HIC (Hydrogen Induced Cracking) test reports for classification support
• Confirm no internal plastic coating, as coated pipes may shift to 7306.60 if for corrosion protection
Related Products under HTS 7304.24.40.20
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