About This Resource
A Reference for the Full Pressure Spectrum
Most flange references are built around one end of the curve. This one is not. It exists because engineers, buyers, and procurement teams shouldn't have to chase three vendors and three reference sites to spec out a complete piping system.
Why This Site Exists
Piping systems do not live on one pressure class. A petrochemical plant might run cooling water through Class 125LW lightweight flanges on the intake, ASME B16.5 Class 300 through the process loop, and API 6BX at the wellhead feeding the unit. Different specs, different documentation, often different vendors. The result is procurement complexity that costs more than the flanges themselves.
This resource was built to flatten that. Specs for lightweight AWWA service sit alongside specs for API wellhead service. Material guides for A105 carbon sit alongside guides for Inconel and Hastelloy. Sourcing comes from a single point. Documentation matches.
What You Can Find Here
Reference content for every major flange standard in commercial use:
- ASME B16.5 and B16.47 for general industrial process
- AWWA C207 and ANSI B16.1 for waterworks and lightweight service
- API 6A and 6BX for wellhead and high-pressure oil and gas
- DIN and EN 1092-1 for European metric specs
- MSS SP-44 for high yield carbon (X42 through X70 mating)
- NACE MR0175 material restrictions for sour service
Who Is Behind It
The supply side of this resource is Texas Flange & Fitting Supply, a Houston-area flange and fitting source that has been shipping into oil and gas, waterworks, power, petrochemical, and general manufacturing since 1986. The content here draws on that history, the engineering work that goes into every quote, and the technical questions that come in by phone every week.
What that means in practice: the information here was not pulled from a textbook. It was pulled from the work of actually getting flanges to job sites with the right paperwork and the right metallurgy.
How To Use It
If you are speccing flanges, the Standards and Materials sections will help you cross-reference class to pressure to material. If you are looking at a specific application, the Industries pages map common flange selections to common service conditions. If you need actual dimensions, the Tools section has calculators for bolt torque, flange dimensions, and pressure-temperature lookup.
When you are ready to source, the contact info is right there. No web forms that route into a void.
Ready to Talk Flanges?
The Texas Flange sales desk is one phone call away.