So What Exactly Does “Domestic” Mean? Buy American, BABA, and AIS Requirements for Pipe Flanges
If you work in procurement for government, municipal, or federally funded projects, you have seen the term “domestic” on a spec sheet. You have probably also seen it have three different meanings on several jobs, and we are here to tell you it’s no coincidence. There are multiple overlapping federal requirements that govern what counts as “domestic” material, and they do not all agree with each other.
For pipe flanges specifically, the confusion is real: a flange that qualifies under one program may not qualify under another. If you guess incorrectly, you are looking at rejected submittals, project delays, and potential debarment. Let’s walk through what each of these requirements actually say and what it means for the flanges you are buying.
The Buy American Act (BAA): The Original
The Buy American Act dates back to 1933 and applies to direct federal procurement, meaning purchases made by the U.S. government for its own use. If a federal agency is buying flanges for a government-owned facility, BAA usually applies.
Under the BAA, a manufactured product like a pipe flange qualifies as “domestic” if it is manufactured in the United States and the cost of domestic components exceeds a certain percentage of the total cost of all components. A recent administration raised that domestic content threshold from 55% to 60% in 2022, with a planned phased increase to 65% in 2024, and ultimately 75% by 2029.
What does that look like in practice for a forged steel flange? The raw steel billet, the forging operation, the machining, the heat treatment, the testing, and the coating all factor into the component cost calculation. If the billet was imported but all forging, machining, and finishing happened domestically, the flange may still qualify depending on the cost breakdown. The operative word is “may,” so for each job you need analyze the production process and determine where you land on everything.
The FAR (Federal Acquisition Regulation) provides the implementing rules under FAR Part 25. There are also exceptions and waivers, including situations where domestic product is not available in sufficient quantity or quality, or where the cost is unreasonable (typically more than 20% above the foreign alternative for large businesses, 30% for small businesses). In these cases, waivers are sometimes granted by the project administrator.
Build America, Buy America (BABA): The Newer, Stricter Standard
The Build America, Buy America Act was signed into law as part of the Infrastructure Investment and Jobs Act (IIJA) in November 2021. BABA applies to all federally funded infrastructure projects, which is a much broader scope than the BAA (Buy American Act). If federal dollars are flowing into a water treatment plant, highway, bridge, transit system, broadband network, or energy project, BABA likely applies to the iron, steel, and manufactured products used.
Here is where it gets stricter than BAA: for iron and steel products, BABA requires that all manufacturing processes occur in the United States. That includes smelting, melting, rolling, bending, cutting, welding, applying coatings, and any other process that alters the physical form or chemical composition of the product. For a pipe flange, this means the steel must be melted and poured domestically, not just forged or machined here.
This is a critical distinction. Under BAA, you could potentially import a foreign-melted billet, forge and machine it in the U.S., and still meet the domestic content threshold. Under BABA, that same flange would not qualify because the smelting did not occur in the United States. Sometimes these terms are used interchangeably, and so it’s important to make the distinction between them. BAA requirement jobs are more common than BABA ones.
BABA also introduces a “manufactured products” category for non-iron/steel items, which requires that the product be manufactured in the U.S. and that the cost of components mined, produced, or manufactured in the U.S. exceeds 55% of the total component cost. For flanges specifically (which are of course considered iron and steel products), the “all manufacturing processes” standard applies.
Domestic Sourcing Requirements for Pipe Flanges
| Requirement | Scope | What “Domestic” Means for Flanges | Key Distinction |
|---|---|---|---|
| Buy American Act (BAA) | Direct federal procurement | Manufactured in U.S. + domestic component cost exceeds threshold (60% in 2024, projected rising to 75% by 2029) | Allows foreign-melted steel if domestic content threshold is met |
| Build America, Buy America (BABA) | All federally funded infrastructure | ALL manufacturing processes in U.S., including melting and pouring of steel | No foreign-melted steel allowed |
| American Iron and Steel (AIS) | EPA and USDA funded water/wastewater projects | ALL manufacturing processes in U.S. for iron and steel products | Predates BABA; same standard but generally limited to water sector |
American Iron and Steel (AIS): The Water Sector Requirement
The AIS provision has been around longer than BABA and applies specifically to projects funded through the EPA’s State Revolving Fund (SRF) programs, as well as certain USDA Rural Development water and wastewater programs. Most commonly, if you are quoting AWWA or ASME spec flanges for a water treatment plant, a wastewater facility, or a distribution system upgrade that uses SRF money, this AIS requirement applies.
The standard under AIS is functionally the same as BABA for iron and steel: all manufacturing processes must occur in the United States, from melting through final fabrication. The AIS provision actually served as the template for BABA’s iron and steel requirements. Now that BABA is in effect, AIS and BABA essentially overlap for water infrastructure projects. But AIS is still independently enforced, so you will often see both referenced in the same project specification.
AIS has its own waiver process through the EPA, separate from BABA’s waiver process through the Office of Management and Budget (OMB). In practice, waivers are difficult to obtain and require a demonstration that domestic product is unavailable or that the cost is unreasonable. Usually AIS certification requires paperwork to be provided per project.
Why This Matters More Than Ever
The practical reality is that domestic sourcing requirements are expanding, not contracting. The BABA threshold increase schedule under BAA is pushing domestic content requirements toward 75%. BABA has cast a wider net over infrastructure spending. With the Infrastructure Investment and Jobs Act, the CHIPS Act, and the Inflation Reduction Act all directing billions into domestic projects, the volume of work subject to these requirements is at a historic high.
For procurement managers and engineers specifying pipe flanges, this means you need to know three things before you issue a PO:
First – which funding source applies to your project? Direct federal procurement triggers BAA. Federal infrastructure funding triggers BABA. EPA/USDA water funding triggers AIS (and now BABA as well). State or private funding with no federal nexus may have no domestic requirement at all, or may have state-level preferences.
Second – what documentation will you need? For BAA, you typically need a manufacturer’s certification of domestic production. For BABA and AIS, you often need certification that all manufacturing processes, including melting, occurred in the United States. This is often documented through mill test reports (MTRs) that trace the heat back to a domestic mill. If you are not sure how to read an MTR, we have a guide for that.
Third – does your supplier actually stock domestically compliant material, or are they going to scramble to find it after the order is placed? Lead times on domestic-melt flanges can differ significantly from standard inventory, especially in larger sizes and higher pressure classes. Given occasional material shortages, it is important to plan accordingly.
What Texas Flange Can Do
We handle domestic sourcing requirements regularly and can confirm whether specific flanges in our inventory meet BAA, BABA, or AIS requirements. We provide the documentation to back it up: MTRs with domestic melt verification, manufacturer certifications, and/or compliance letters as needed. As domestic means different things depending on the project in question, we would be happy to discuss those needs with you.
If you are quoting a project with domestic requirements and need to confirm availability, pricing, or lead times, get in touch. We will tell you what we have, what we can get, and how quickly.
Related reading: For the current state of Section 232 tariffs, BABA thresholds, and AIS compliance, see our 2026 tariffs and domestic content update.
