Some antidumping orders on OCTG explicitly include or exclude certain connection types (e.g., premium connections vs. API-standard connections) within their scope language. A product with a premium proprietary connection may fall outside a particular order's scope even if its outer diameter and grade would otherwise be covered. Importers should review the specific order's scope and any Commerce Department scope rulings before assuming coverage or exclusion.

Misclassification can result in underpayment of antidumping or countervailing duties if the correct subheading carries an active order that the misclassified entry avoided. CBP can issue a penalty and demand back duties with interest. Because OCTG and line pipe orders often cover different countries and different duty rates, the financial exposure from misclassification can be substantial, particularly for large-volume shipments.