At Large Diameter Flanges, we supply both domestic and import flanges — because different projects have different needs. Whether you’re working on a government contract that requires U.S.-made material or looking for cost-effective options for private infrastructure, we’ve got you covered.
Domestic Flanges: Made in the USA, Built to Spec
We offer flanges made in the U.S. by trusted manufacturers that meet all applicable ASME, ASTM, and API standards. These are ideal for:
- Projects with Buy America(n) requirements
- Jobs that demand full traceability and MTRs from U.S. mills
- Customers who prioritize shorter lead times and domestic quality control
Benefits of domestic flanges:
- U.S. mill certs and full traceability
- Compliance with federal and municipal sourcing laws
- Faster turnaround and shipping times
- Reliable communication and support
Import Flanges: Quality Options at Competitive Pricing
We also supply import flanges from vetted international mills — many of which are ISO 9001 certified and produce to the same ASME/ANSI/API standards.
Benefits of import flanges:
- Lower unit cost
- Availability of hard-to-find sizes
- Bulk orders for large-scale projects
- Sourced from long-term partners we trust
We inspect and verify every import flange before it ships — and we stand behind everything we sell.
Let Us Help You Choose
Not sure which option is right? We’ll walk you through it based on:
- Project specs
- Budget
- Lead times
- Compliance needs
We’ll never sell you more than you need — just what fits your job, your timeline, and your standards.
Traceability, Always
Whether it’s domestic or import, we provide full documentation:
- Material Test Reports (MTRs)
- Country of origin
- Compliance certificates
You’ll always know where your flange came from, what it’s made of, and what it can handle.