Effective May 14, 2022, the Build America, Buy America Act introduced expanded domestic sourcing rules for all federally funded infrastructure projects.
AIS applies to water and wastewater infrastructure projects, while Buy America applies to federally funded transit and public infrastructure programs. Both standards require domestic production, but differ in thresholds and covered materials. Under these rules, a project cannot use federal funds unless qualifying iron, steel, manufactured products, and construction materials are produced in the United States. The EPA continues to gather industry feedback through listening sessions to refine how these categories are defined and applied across different project types.
Ideal for energy, transportation, and pipeline networks needing durable, compliant flange components.
Mandatory for drinking water and clean water projects financed through federal loans or grants.
The Public Interest Waiver is used when “applying the domestic content procurement preference would be inconsistent with the public interest.”
The Non-availability Waiver is used when the “types of iron, steel, manufactured products or construction materials are not produced in the United States in sufficient and reasonably available quantities or of satisfactory quality.”
The Unreasonable Cost Waiver is used when the “inclusion of iron, steel, manufactured products, or construction materials produced in the United States will increase the cost of the overall project by more than 25%.
The Buy America Act is a requirement applied to infrastructure projects that use federal funding to ensure taxpayer-funded grants are used to purchase American-made components rather than non-domestic parts. Buy America, which applies to state and local government level projects funded by the Federal Transit Authority (FTA), requires the construction materials are 100% domestic.
It covers a wider variety of projects and is more likely the specification followed for the purchases of flanges and piping system components. The Buy American Act was signed in 1933 to require that materials purchased for government-related projects are forged and machined by American manufacturers. The law applies to the purchase of end products intended for use within the USA, with a requirement that the items are manufactured with at least 50% domestic materials.
A “Made in the USA” designation does not guarantee that the finished product complies with all AIS, Buy America, or Buy American requirements. Further documentation is required to ensure the raw materials and manufacturing methods meet required conditions—typically a Mill Cert or MTR is used to confirm compliance with AIS or Buy American requirements.
“Made in America/Made in USA” designations only ensure a U.S.-based production location—but this does not guarantee that the manufacturer used domestic materials. Because Made in USA products may not be manufactured using domestic materials, this label alone does not ensure compliance with AIS, Buy American, or Buy America, all of which require that materials, processing, and production occur within the United States.
To order domestically manufactured flanges from API International, determine your required pipe size, pressure class, material, and any special standards (such as ASME B16.5). Contact API International’s experienced team and we will help you select the right flange for your application.
• Custom Bolt Holes, Overbore, Counterbore, Tapped, Welds, O-ring Grooves, Threads, Special Serrations, Bevels, Chamfers
• Metric Parallel, Metric Tapered, Parallel (BSPP), Taper Thread (BSPT), UN/UNF/UNC Thread, NPT (National Pipe Thread)
• MWD
• Contact API’s engineering department for exact specifications and tolerances.
Plastic: Delrin, POM, Lexan, Nylon 66, Nylon 6, PEEK, PP, PE, Acetal
Rubber: EPDM, Neoprene, Buna-N, Viton
Aluminum: A2011, A2024, A2017, A5052, A5056, A6061, A6063, A6463, A6082, A7075
Copper: 3600, 3604, 3771
Titanium: 1-28
Steel Series:
• Ductile Iron: ASTM A536
• Carbon/Mild Steel: A105, A36, A516-70, A572-50, etc.
• Stainless Steel:
- 300 Series – 303, 304, 304L, 316, 316L
- 400 Series – 420J2, 430, 434, 442
Special Metals: Hastelloy, Inconel, Incoloy, Duplex 2205, Super Duplex 2507, Chrome Steel, alloys, or their equivalents
Stock Finish, Spiral Serrated (Phonographic), Concentric Serrated, Smooth Finish, Cold Water Finish, MWD, Phonographic
Dipped, Nickel Plating, Zinc Plating (clear, yellow, black, red, blue), Super Agitine, Powder, Painted, Galvanized, Epoxy, Lacquer
Water/Wastewater, Irrigation, Agriculture, HVAC, Marine, Exhaust, Mining, Energy/Power Generation/Oil
• Forged:
- Ring Rolling:
• Materials: Carbon Steel, Stainless Steel, Duplex
• Size: 2–202”
• Cast:
- Centrifugal Casting (Industrial):
• Material: Stainless Steel
- Continuous Casting:
• Stainless Steel
- Sand Casting:
• Material: A536, Stainless Steel, Ductile Iron
- Investment/Lost-Wax/Precision Casting
• Stainless Steel
Machining: Milling, Turning, Facing, Boring, Drilling, Tapping, Counter Sinking, Laser Cutting, Water Jet, Plasma Cutting
Products | Type | Materials | Size Range |
|---|---|---|---|
Flanges | Flat-Face, Raised-Face, & Plate: Slip-On/Ring Weld, Neck, Blind, Socket Weld, Orifice, Reducing, Threaded | See Materials List | 5–202″ |
Gaskets | Molded, Extruded, sheet | EPDM, Buna-N, NBR, Non-Asbestos (GNA), Red Rubber (GRR), Viton | 5–60″ |
Screens For Filters | Basket Screens and Cone Screens (Perforated, Mesh) | Galv. Carbon Steel, Carbon Steel, Stainless Steel | 6”D x 8’-H |
Rings | Exhaust Rings (Marmon Flanges for DPF Filters) | Carbon Steel, Stainless Steel, Aluminum | 1–16” |
Seamless Rolled Rings | Forged | Carbon Steel, Stainless Steel, Aluminum | 1–165” |
Square Hole Rings | Repair Couplers | Stainless Steel, Carbon Steel, Galvanized, Epoxy Coated | 3–32” |
Fabricated Assemblies | Weldments, Pipe Spools, Valve Bodies, Silencer Housings | Carbon Steel, Stainless Steel | 2–24” |
Long/Short Radius Elbows | EN 10253-2–S235, P235GH–P265GH–P265NL and ASTM A234, WPB, WPC/ A420 WPL6, WPL3/ A860 WPHY52/ ASTM A234 WP11, WP22, WP5, WP9–16Mo3 | 304L & 316L Stainless Steel | (45° & 90°): OD: 21.3mm (1/2”)–3048mm (120”) WT: Up to SCH. XXS/160 |
Miscellaneous | Tubesheets / Diffuser Plates / Baffles / Ferrules / Sleeves / Pins | Carbon Steel, Stainless Steel, Duplex | 5–104” |
Who we are
API International is a manufacturer and wholesale distributor of flanges, expansion joints, valves, other pipe fittings and custom fabricated parts. We offer a wide variety of AIS & imported flanges along with other industrial pipe fitting and accessories. Customers turn to us when they need quick delivery of parts and are looking for a higher level of customer service. Standard parts are stocked in one of our conveniently located warehouses for quick distribution throughout the United States.
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