10-3/4 inch 51.5 ppf SMSS 13-5-2 Casing
Super martensitic stainless steel (13-5-2) seamless casing for subsea oil/gas completions, 10-3/4 inch OD exceeding 406.4mm specification. Engineered for extreme sour service and high collapse resistance. HTS 7304.24.40.80 due to stainless steel composition and oilfield casing use.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If OD 114.3mm to 406.4mm range
Smaller diameter stainless casing falls under 7304.24.10 statistical breakouts despite same material/use.
If imported as semi-finished stainless steel hollow sections
Unthreaded/ID ground hollow products may classify as stainless steel bars/tubes of 7222 if not finished casing.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide SSC (Sulfide Stress Cracking) test results per NACE MR0175/ISO 15156
• Document exact wall thickness and ID; affects pressure rating declarations
• Use TSA (Threaded & Coupled Assembly) designation if applicable to distinguish from BTC couplings
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