Harmonized System
U.S. imports of Stainless Steel Butt Welding Pipe & Tube Fittings (HS 730723) totaled $20.7M in August 2026, imported from 33 countries.
Importers of Stainless Steel Butt Welding Pipe & Tube Fittings paid $11.5M in duties in August 2026, an average duty rate of 56.26% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Stainless Steel Butt Welding Pipe & Tube Fittings imports of $20.7M in August 2026 ran 18% above the year-to-date monthly average of $17.5M.
Last updated: August 2026 dataButt welding fittings — elbows, tees, reducers, and caps joined by fusion welding rather than threads or mechanical means — are the standard connection method for high-pressure, high-temperature, and high-purity stainless steel piping in petrochemical, power generation, and semiconductor fabrication. The US schedule distinguishes fittings that have not been machined or tooled (7307230030) from all other butt welding fittings (7307230090). South Korea leads US supply under this heading, with Malaysia and Taiwan also prominent. Antidumping and countervailing duty orders on stainless steel butt-weld pipe fittings from certain countries have been in force for many years; scope verification is essential before entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.1K import shipments a month
ASME B16.9 and ASTM A403 are the primary US standards for wrought stainless butt-weld fittings. While conformance to these standards does not itself determine HTS classification, specification documents citing these standards help establish that the product is a butt welding fitting (730723) rather than a cast fitting (730719) or a threaded fitting (730722). Material test reports and dimensional certifications are standard entry documentation.
The two active 10-digit lines under 730723 separate fittings in a rough or as-formed state (7307230030) from finished fittings (7307230090). In practice, most commercially traded butt-weld fittings are finish-machined to dimensional standards and therefore enter under 7307230090. The distinction matters primarily when fittings are imported in a semi-finished state for further processing in the US.
Subheading 8 of 10 in heading 7307
Subheading 730723 · $20.7M of $280.0M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7307230090 | Ss Tube or Pipe Butt Welding Fittings, NESOI | $19.9M | 56.24% | 99.51% | $11.2M |
| 7307230030 | Ss Tube/Pipe Butt Welding Fitngs Nt Mchned/Tooled | $447K | 56.88% | 100.00% | $254K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7307230000 | Stainless Steel Tube or Pipe Butt Welding Fittings | $14.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
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Imports · August 2026
origin
China pays 79.3% duty; South Korea 50.6%.
customs district
destination
entry
rate provision · imports
0.5% enters free of duty; duty collected equals 56.26% of imports for consumption.
ImportsExports
Imports
$20.7MYoY · free account
Exports
$14.0MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $192.2M of Stainless Steel Butt Welding Pipe & Tube Fittings and exported $101.7M.
Through August 2026. Source: U.S. Census Bureau.