4-1/2" TP347H Stainless OCTG Tubing with Coupling
High-temperature TP347H stabilized stainless welded tubing 4-1/2" OD for steam injection wells, imported with couplings. Fits HTS 7306.21.80.10 as welded stainless tubing for oil/gas drilling with attached couplings. Heat-resistant grade prevents carbide precipitation.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded of alloy steel other than stainless
Non-stainless high-temp alloys like 9Cr-1Mo classify under 7306.50, excluding stainless per material definition.
If stainless threaded nipples/short sections
Tubing cut <3m with both ends threaded becomes pipe nipples under 7307 fittings heading.
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Import Tips & Compliance
• Document stabilization heat treatment (carbide solution annealing) proving TP347H grade suitability
• Ship vertical in racks to prevent buckling; horizontal stacking risks ovality beyond API tolerances
• Cross-reference with ASTM A312 for seamless equivalents if manufacturing disputed during entry
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