RE: The tariff classification of explosion vent panels from Spain

U.S. Department of Homeland Security U.S. Customs and Border Protection National Commodity Specialist Division One World Trade Center, Suite 51.201 New York, NY 10007 U.S. Customs and Border Protection N366019 October 23, 2026 CLA-2-73:OT:RR:NC:N1:113 CATEGORY: Classification TARIFF NO.: 7326.90.8688 Jacquelyn Votra Trans-Border Global Freight Systems, Inc. 2103 Route 9 Round Lake, NY 12151 RE: The tariff classification of explosion vent panels from Spain Dear Ms. Votra: In your letter dated October 14, 2026, you requested a tariff classification ruling on behalf of your client, Adix Industrial Protection USA, Inc. Informational material was submitted with your request. The items under consideration are explosion vent panels. The vent panels are passive safety devices engineered to rupture at a predetermined pressure safely and rapidly releasing expanding gases, flames, and dust relieving and directing the explosion overpressure to a designated safe area. The panels are made of stainless steel and designed to cover the openings of spaces containing mechanical equipment. The installation of the panels depends on the opening’s size and surface. Each panel has equally spaced holes along its perimeter which enables them to be installed with screws, bolts, or other accessories. In the information provided these panels are specified with three or four letter codes that indicate shape and use. The first two letters indicate shape: “BR” indicates rectangular, “BC” is circular, and “BT” is trapezoidal. The panels specified under “BRP,” “BCP,” and “BTP” are flat and used for zero to low vacuum applications without pulsating pressure. BRP can cover a length or width from 250 millimeters (mm) to 2080 mm. BCP can cover a diameter from 280 mm to 1020 mm, and BTP can cover a length or width from 367 mm to 1700 mm. The panels specified under “BRD,” “BCD,” and “BRDM” are domed in appearance with concave and convex surfaces. On installation, the concave surfaces for these panels face the inside of their covered openings while convex surfaces face out. These panels are used for vacuum and pulsating pressure applications. BRD covers a length or width from 250 mm to 1000 mm. BCD covers a diameter from 280 mm to 1020 mm, and BRDM can cover a length or width from 250 mm to 1000 mm. The panels specified under “BRS” and “BRH” are flat with ribbing along their surface, and both can cover a length or width of 570 mm to 1000 mm. BRS panels are used in low vacuum applications with pulsating pressure, and BRH is used in mitigating explosions caused by hydrogen gas accumulation. In your submission, you suggest that the explosion vent panels are classifiable under subheading 8431.39.00, Harmonized Tariff Schedule of the United States (HTSUS), which provides for “Parts suitable for use solely or principally with the machinery of headings 8425 to 8430: Of machinery of heading 8428: Other.” We disagree. The subject panels are not manufactured for a particular machine. Instead, they are built to standard geometries and sizes, making them suitable for use in bucket conveyors, grain bins, dust collectors, cyclones, or any application that may need an explosion panel. Since they are not solely or principally used with a machine of heading 8428, they cannot be classified in heading 8431, HTSUS. Heading 7326, HTSUS, is a residual or basket provision which covers a wide range of iron or steel articles that are not more specifically provided for elsewhere in the HTSUS. The Explanatory Notes (ENs) to heading 7326 state that “This heading covers all iron or steel articles obtained by forging or punching, by cutting or stamping or by other processes such as folding, assembling, welding, turning, milling or perforating other than articles included in the preceding headings of this Chapter or covered by Note 1 to Section XV or included in Chapter 82 or 83 or more specifically covered elsewhere in the Nomenclature.” An article of iron or steel can be classified in heading 7326 if it is determined that the item is not more specifically provided for in any other heading of the tariff. The explosion vent panels are not specifically covered elsewhere in the tariff. Accordingly, they are classifiable in heading 7326, HTSUS. The applicable subheading for the explosion vent panels will be 7326.90.8688, HTSUS, which provides for “Other articles of iron or steel: Other: Other: Other: Other: Other.” The general rate of duty will be 2.9 percent ad valorem. The duties cited above are current as of this ruling’s issuance. Duty rates are provided for your convenience and are subject to change. The text of the most recent HTSUS and the accompanying duty rates are provided at https://hts.usitc.gov/. This ruling does not address the applicability of any additional duties, taxes, fees, exactions and/or other charges, which may apply to the goods discussed herein. This includes, but is not limited to, tariffs and other duties as provided for in Subchapter III to Chapter 99, HTSUS. Thus, for example, in addition to the classification stated above, the merchandise covered by this ruling may also need to be reported with either the Chapter 99 provision under which an additional tariff applies or one of the Chapter 99 provisions covering exceptions to such tariffs. For further information to assist with the importation process, please refer to the frequently updated Cargo Systems Messaging Service (CSMS) messages at https://www.cbp.gov/trade/automated/cargo-systems-messaging-service and the Trade Remedies page at https://www.cbp.gov/trade/programs-administration/trade-remedies. The holding set forth above applies only to the specific factual situation and merchandise description as identified in the ruling request. This position is clearly set forth in Title 19, Code of Federal Regulations (CFR), Section 177.9(b)(1). This section states that a ruling letter is issued on the assumption that all of the information furnished in the ruling letter, whether directly, by reference, or by implication, is accurate and complete in every material respect. In the event that the facts are modified in any way, or if the goods do not conform to these facts at time of importation, you should bring this to the attention of U.S. Customs and Border Protection (CBP) and submit a request for a new ruling in accordance with 19 CFR 177.2. Additionally, we note that the material facts described in the foregoing ruling may be subject to periodic verification by CBP. This ruling is being issued under the provisions of Part 177 of the Customs and Border Protection Regulations (19 C.F.R. 177). A copy of the ruling or the control number indicated above should be provided with the entry documents filed at the time this merchandise is imported. If you have any questions regarding the ruling, please contact National Import Specialist Matthew Gay at matthew.gay@cbp.dhs.gov. Sincerely, (for) James P. Forkan Director National Commodity Specialist Division