Steel Flanges Forged to
API 6A/6BX
Every joint in an API wellhead system is a point of integrity. We supply flanges, fittings, and custom machined components engineered to hold under stress for up to API 20K class connections.
What Are API Flanges?
API flanges are built for the oil and gas sector, including upstream, midstream, and even downstream. The API 6A specification (developed by the American Petroleum Institute) covers flanges used in high-pressure petrochemical and oilfield applications where some standard ANSI/ASME ratings just don't cut it.
Dimensionally, API 6A flanges look similar to their ASME counterparts, but the pressure requirements start where most ASME flanges top out. The baseline is the 2000# class (similar to the ASME 600# class), and from there the classes climb: 3000#, 5000# - up to the 6BX 10,000#, 20,000# and 25,000# for the most demanding applications.
Most jobs fall in the 5000# range and below; the extreme high-pressure classes are less common but available for production when you need them.
One thing that's non-negotiable with API flanges: ring type joint (RTJ) facings with the proper ring gaskets. That metal-to-metal seal is what gives them the integrity needed for volatile, high-pressure service.
On the upstream side, you'll find API flanges on wellheads, blowout preventers, and drilling equipment. Downstream in refining and processing, they handle the conditions involved in turning crude oil into finished products.
API = American Petroleum Institute. More at api.org
What We Supply
Three product categories. Thousands of configurations. Every piece traceable, tested, and ready to install.
Built to Code. Every Time.
No gray areas. Every flange ships with full material traceability and dimensional verification against the standard it was ordered to.
Why Work With Us
Full Traceability
Every flange ships with mill test reports traceable to the heat number. No paper shuffling, no guesswork. You get the MTR before the truck shows up.
Pressure-Rated Right
We cross-reference your service conditions against ASME pressure-temperature tables before quoting. If the spec does not fit the duty, we say so.
Dimensional Accuracy
Bolt holes, raised faces, bore tolerances -- measured and documented. Our QC catches problems before they reach the field.
Rapid Turnaround
Standard flanges ship from stock. Custom work follows a clear production timeline with updates, not silence. Rush options available when the shutdown clock is running.
Domestic & Import Options
Buy American requirements? Covered. Budget project needing competitive pricing? Also covered. We source from qualified mills on both sides of the equation.
Specialty Materials
Duplex, super duplex, Inconel, Monel, Hastelloy, chrome-moly. If the application calls for exotic metallurgy, we have the supply chain for it.
From Refinery to Reservoir
Different industries, different specs, same standard of execution. We know which flange goes where because we have been supplying them all.
Common Flange Types
High-pressure, high-temp service
Dead-end piping, test points
Low-pressure, easy alignment
Small-bore, no welding needed
Small-bore, high-pressure
Rotating alignment, easy disassembly
Flow measurement tapping
Nozzle extensions, vessels
From Request to Delivery
Submit Your Specs
Send us a drawing, a BOM, or just a description of what you need. We will sort out the details.
Review & Quote
We verify the spec against the standard, confirm material availability, and return a firm quote with lead time.
Production & QC
Your order goes to the right mill or machine shop. Dimensional checks and MTR verification before it ships.
Delivery
Packed, tagged, and shipped with full documentation. Freight options from standard to expedited hot-shot.
Engineering Reference
Spec sheets are fine. Understanding why the spec matters is better. These guides help your team make faster, more confident decisions.
Frequently Asked
Need Flanges? Let's Talk.
Whether you need ten slip-ons for a maintenance job or ten thousand weld necks for a new build, the process starts with a conversation.