SA-213 TP347H Seamless Alloy Steel Tube
High-temperature seamless tube of austenitic stainless alloy steel (347H grade) with 165 mm OD and 14.2 mm wall thickness, used in boiler superheaters and heat exchangers. Classified under HTS 7304.59.80.35 for its seamless construction, circular profile, alloy steel material, and precise dimension specs. Meets ASTM A213 for elevated-temperature service.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If austenitic stainless steel like 304/316
Austenitic grades have dedicated provisions in 7304.41-7304.49, distinct from 'other alloy steel'.
If imported as boiler tube assemblies
Pre-assembled into functional boiler components shifts to machinery parts in Chapter 84.
If wall thickness under 12.7 mm
Thinner walls in same OD range classify in adjacent 7304.59.60 statistical breakouts.
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Import Tips & Compliance
• Provide NACE MR0175/ISO 15156 certification if for sour service to support valuation and compliance
• Include hydrostatic test reports (min 2x operating pressure) as proof of pressure rating capability
• Avoid bundling with fittings; separate shipments prevent set classification under 7307
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