Yes. While ASME certification is a domestic safety and commercial requirement rather than a US Customs admissibility condition, most end-users and state jurisdictions require ASME code stamps on boilers and pressure vessels. Importers should confirm code compliance with the foreign manufacturer before shipment to avoid costly rework or rejection at the project site.

Heat exchangers fabricated primarily from steel or aluminum may be subject to Section 232 tariffs on the metal content or on the finished article, depending on classification. Importers should work with a licensed customs broker to determine whether the finished equipment or its component materials trigger Section 232 exposure and whether any product exclusions apply.