SA-213 TP347H Seamless Boiler Tube
Seamless tube made from TP347H stabilized austenitic stainless steel alloy, designed for high-temperature service in superheaters and boilers. It has an outside diameter of 457 mm, exceeding 406.4 mm, and meets ASME SA-213 specifications for pressure parts in power generation boilers. Classified under 7304.59.20.80 due to its seamless construction, alloy steel composition, circular cross-section, and suitability for boilers with large OD.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of stainless steel
Stainless steel alloys like TP347H fall under subheading 7304.39 for other stainless steel seamless tubes, differentiated by specific alloy composition from general alloy steel.
If not suitable for boiler or heat exchanger use
Excludes tubes specifically designed for boilers/superheaters; general-purpose large OD seamless alloy steel tubes classify under 7304.19.
If welded rather than seamless
Welded construction, even with identical material and dimensions, shifts to Chapter 73 heading 7306 for welded pipes/tubes.
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Import Tips & Compliance
• Obtain material test reports (MTRs) certifying chemical composition and mechanical properties to confirm alloy steel status and ASME compliance
• Ensure marking includes heat number, grade, and seamless designation per ASTM/ASME specs to avoid reclassification during customs exam
• Verify outside diameter measurement exceeds 406.4 mm with caliper certification; common pitfall is mismeasuring welded vs. seamless products
Related Products under HTS 7304.59.20.80
ASTM A335 P91 Large Diameter Boiler Pipe
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SA-213 T92 Superheater Tube
High-strength T92 martensitic alloy steel seamless tube for superheaters in ultra-supercritical boilers, featuring 432 mm OD. Optimized for temperatures above 600°C with superior oxidation resistance. Classified in 7304.59.20.80 for its large diameter, seamless alloy steel construction suited for superheaters.
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