Forged. Plate-Cut. Custom.
Steel Flanges Built for
Every Service Class
A105 carbon for the day-to-day. A694 high yield for Class 600 and above. F22 and F91 chrome-moly for high-temp creep service. Plate-cut AWWA for waterworks. Custom diameters out to 203 inches. Whatever the project needs, we stock or machine it.
Three Production Paths
Forged, Plate, or Custom
Forged
The industry default. ASME B16.5 and B16.47 forged carbon, stainless, and alloy. A105, A350 LF2, F11, F22, F91, plus duplex and exotic. Class 150 through 2500. 1/2 inch through 60 inch NPS.
Plate-Cut
Flame-cut or CNC-machined from certified plate. AWWA C207 for waterworks, B16.1 cast iron pattern compatibility, structural connections, tank nozzles. Economical for low-pressure and non-code service.
Custom
Non-standard sizes through 203 inches. Overbore, special facings, ring-type joint grooves, weld overlay, hard facing. Drawings or specs, either works. Full MTR documentation on every piece.
203"
Max Custom Diameter
50+
Material Grades
A105 - F91
Carbon to Chrome-Moly
1986
Supplying Since
What We Supply
Every Steel Flange Type. Every Configuration.
Slip-on for forgiving fit-up. Weld neck when the service gets serious. Blind to cap it off. Plus the specialty work: orifice, spectacle blind, long weld neck, RTJ, lap joint. All in steel.
Flanges
Weld neck, slip-on, blind, threaded, socket weld, lap joint, orifice, spectacle blind, plate, long weld neck. 1/2 inch through 203 inch. Class 150 through 2500.
- ✓ASME B16.5 & B16.47
- ✓AWWA C207 & C228
- ✓API 605 & MSS SP-44
- ✓DIN & EN 1092-1
Pipe Fittings
Elbows, tees, reducers, caps, couplings, unions, and specialty fittings. Butt-weld, socket-weld, threaded. Carbon, stainless, chrome alloy.
- ✓ASME B16.9 & B16.11
- ✓Schedule 10 through XXH
- ✓Seamless & welded
- ✓Hot induction bends
Custom Machining
Non-standard bores, overbore flanges, RTJ grooves, weld overlay, hard facing, oversized blanks. Drawings or specs. The work that catalog flanges cannot cover.
- ✓CNC turning & milling
- ✓Ring-type joint grooves
- ✓Weld overlay & hard facing
- ✓Full MTR documentation
Standards & Compliance
Every Code, Documented
Forged or plate, every flange ships with full material traceability against the standard it was ordered to. EN 10204 3.1 and 3.2 certificates on request.
ASME B16.5
Pipe Flanges 1/2" - 24"
ASME B16.47
Large Diameter 26" - 60"
AWWA C207
Plate Flanges 4" - 144" (Cl F: 4" - 48")
API 605
Petroleum Service Flanges
ANSI B16.1
Cast Iron Compatibility
MSS SP-44
High Yield F42 - F70
DIN / EN 1092
European Metric
NACE MR0175
Sour Service Materials
The Difference
Why Engineers and Buyers Pick Us
Forged AND Plate
Most distributors do one or the other. We supply both. Forged for ASME pressure piping, plate-cut for AWWA waterworks and structural. One vendor, one set of paperwork.
Custom Without the Wait
Non-standard bores, oversized blanks, special facings, RTJ grooves. Our machining program runs alongside stock inventory through partner shops. Catalog stops where most jobs actually start.
Full Material Range
A105 mild carbon for the day-to-day. A694 high yield for Class 600 and above. F11, F22, F91 chrome-moly for steam and high-temp. Duplex and exotic when service demands it.
Sizes Through 203 Inches
Standard ASME caps at 60 inch. AWWA goes to 144. Above 144 inch is fully custom plate fabrication outside any published standard; dimensions, drilling, and pressure rating are project-specific. We have coordinated plate-cut work through 203 inches on prior projects.
MTRs Before the Truck Arrives
Every order includes mill test reports traceable to the heat number. No chasing paperwork after delivery. EN 10204 3.1 and 3.2 certificates available on request.
Domestic or Import
Buy American projects covered. AIS and BABA documentation when required. Import sourcing when the budget calls for it. Both sides of the supply chain handled.
Sectors We Serve
From Refinery to Water Main
Different industries, different specs. Same standard of execution.
Technical Resources
Engineering Reference
Spec sheets are fine. Understanding why the spec matters is better. These guides help your team make faster, more confident decisions.
Flange Types Guide
Weld neck vs slip-on vs blind vs plate. Application criteria for each.
Access Resource →
Pressure-Temperature Ratings
ASME B16.5 P-T tables. How class translates to PSI at temperature.
Access Resource →
Bolt Torque Reference
Recommended torque values for B7 studs by size and lubrication.
Access Resource →
Material Grade Guide
A105 vs A694 vs F11 vs F22 vs F91. Which grade for which service.
Access Resource →
Corrosion Prevention
Coatings, galvanizing, material selection for corrosive environments.
Access Resource →
Flange Dimension Tables
ASME B16.5 dimensional data. OD, bolt circle, bolt holes, thickness by class.
Access Resource →
Which Steel Is Most Popular?
The most widely used material grade out there is A105 forged carbon steel. It covers a broad size range - 1/2" to 24" under ASME B16.5, 26" to 60" under ASME B16.47, and all the way up to 96" under B16.1. That size flexibility, combined with a working range of ambient up to 1,000°F and pressures anywhere from 20 to 6,170 psi, makes carbon steel flanges a practical fit for a wide variety of industrial applications. They also happen to be one of the more cost-effective options on the market, which never hurts, and it is the industry standard replacement for the previously designed cast iron specification. Most A105 flanges come painted from the factory, but you can also opt for galvanization.
Why Choose High Yield Carbon Steel Flanges?
When we talk about yield strength, we're really just talking about how much stress a piece of steel can take before it starts to permanently deform. That threshold is known as the "yield point" and is essentially the maximum load you want to put on the material. The good news about yielding is that it's a gradual process, so deformation is usually visible before anything catastrophic happens. High yield carbon steel flanges are heat treated to push that deformation threshold higher, which makes them the go-to choice for high pressure and high temperature applications: typically Class 600# and above. They also carry a slightly higher carbon content than mild steel, which makes them tougher and less brittle overall. This also has an effect on weldability, so make sure to take that into consideration if you are a fabricator. What really sets these flanges apart in demanding service conditions is their resistance to wear. When you need something that's going to last in a tough environment, that durability is what matters most. These flanges fall under specifications A694 and MSS-SP44, which cover the full range of grades from F42 to F70, with F52 and F65 being the most common choices.
Common Questions
Frequently Asked
When should I use plate flanges instead of forged?+
Plate flanges are appropriate for low-pressure, non-code applications or for very large diameters where forgings are impractical. They are not a substitute for forged flanges in ASME pressure piping without engineering approval. Common use cases include AWWA waterworks (typically 300 psi or less), structural steel connections, tank nozzles, and ductwork.
Whats the difference between A105 and A694 carbon steel?+
A105 is standard forged carbon steel with a yield around 36 ksi. It covers most general industrial piping in Class 150 through 600. A694 is high yield carbon, heat-treated to push the yield threshold up. Grades F42 through F70 cover yields from 42 to 70 ksi. You see A694 specified in Class 600 and above, particularly on pipeline flanges (per MSS SP-44) where the mating pipe is also high yield (X42 through X70).
What size range can you supply?+
Standard inventory covers 1/2 inch through 24 inch NPS in ASME B16.5. Large diameter from 26 inch through 60 inch in ASME B16.47. AWWA C207 goes through 144 inch in Class B, D, and E; Class F is published only through 48 inch. Above 144 inch is fully custom plate fabrication outside any published standard. We have coordinated plate-cut work through 203 inches OD on prior projects. Call (281) 484-8325 for project-specific size questions.
Can you handle chrome-moly grades like F11, F22, and F91?+
Yes. F11 and F22 are common chrome-moly grades for high-temperature service. F91 (Grade 91) is used in supercritical and ultra-supercritical steam piping where creep resistance is critical. We stock common sizes and source the rest. Post weld heat treatment and hardness control matter, so we recommend specifying the full processing requirements at quote time.
Do you provide mill test reports?+
Every order ships with MTRs traceable to the original heat number. EN 10204 3.1 and 3.2 certificates available on request. You get the documentation before the truck arrives, not after.
What is your typical lead time?+
Standard flanges ship from stock. Custom and high-yield work follows a clear production timeline with updates, not silence. Rush options available when the shutdown clock is running. Call (281) 484-8325 for project-specific timelines.
Need Steel Flanges? Let's Talk.
Whether you need ten weld necks for a maintenance shutdown or a custom plate flange machined to drawing, the process starts with a conversation.