USITC Affirms Tariff Extension

On May 22, 2025, the US International Trade Commission voted to continue anti-dumping duties on malleable iron pipe fittings from China. The unanimous decision came after the agency concluded that removing the existing tariffs would likely result in renewed material injury to the US domestic industry. This move marks the conclusion of the fourth “sunset review” of these duties.

Commerce Department’s Earlier Decision

Prior to the USITC’s ruling, the US Department of Commerce  had already issued its final determination on March 7, 2025, in favor of extending the duties. The sunset review process began on November 4, 2024, and involved a comprehensive evaluation of whether dumping practices might resume if duties were lifted. Both agencies agreed that Chinese producers could again undercut US prices, threatening fair competition.

Nature of the Product

Malleable iron pipe fittings are crucial components used in various industries, including plumbing, gas distribution, HVAC, and industrial piping systems. These products, often found in threaded form, connect sections of pipe and help manage the flow of gases or liquids. They are typically covered under Harmonized Tariff Schedule codes such as 7307.19.30.20.

Background & History

Anti-dumping duties on Chinese pipe fittings were originally imposed in 2003, following evidence of widespread underpricing that severely impacted US producers. Since then, the US has conducted multiple sunset reviews, mandatory every five years, to assess the continued necessity of the trade remedy. Each review concluded that removing duties could lead to renewed dumping.

Industry Impact in the US

Domestic manufacturers, such as Anvil International and Ward Manufacturing, have consistently argued for the retention of these duties. They claim that low-priced imports from China have historically caused job losses, plant closures, and profit erosion. Industry representatives welcomed the USITC’s 2025 decision, stating it helps preserve a level playing field and protect American jobs.

Key Takeaways:

• The US will continue anti-dumping duties on Chinese malleable iron pipe fittings following a USITC review.

• The decision supports long-standing trade protections first imposed in 2003 to prevent underpriced imports.

• US industry claims the duties are vital to maintaining domestic production and fair competition.