Steel Pipe Flanges
Complete line of pressure-rated flanges engineered for every piping application. From carbon flanges to orifice flanges, we deliver ASME-certified solutions for demanding industrial environments.
Request Flange SpecificationsComplete Flange Type Range
Each flange type engineered for specific applications and pressure requirements. We produce all standard types and custom configurations.
Blind Flanges
Solid one-piece flanges without a bore hole, used to blank off the end of piping systems. Ideal for terminal points, isolation, and dead-leg applications requiring complete closure.
Common Applications:
- •Pressure vessel connections
- •Pump and equipment discharge points
- •Isolation flanges
- •Terminal piping applications
Weld Neck Flanges
Most popular flange type featuring a long radius neck that reinforces the connection. The tapered design distributes stress more effectively than other types, making them ideal for high-pressure and high-temperature service.
Common Applications:
- •High-pressure systems
- •Elevated temperature service
- •Critical piping connections
- •ASME pressure vessel flanges
Slip-On Flanges
Flanges that slide over the pipe end and are welded both inside and outside. Lower cost than weld neck but less robust in high-stress applications. Easier to align during installation.
Common Applications:
- •Standard industrial piping
- •Low to medium pressure systems
- •General utility applications
- •Cost-sensitive projects
Threaded Flanges
Flanges with internal threads allowing connection to threaded pipe without welding. Ideal for modular installations, maintenance accessibility, and applications where welding is impractical.
Common Applications:
- •Low-pressure applications
- •Maintenance-friendly connections
- •Modular piping systems
- •Instrumentation lines
Socket Weld Flanges
Compact flanges where the pipe fits into a socket and is fillet welded. Suitable for small diameter, high-pressure applications. Reduces overall connection length compared to slip-on designs.
Common Applications:
- •High-pressure small-bore systems
- •Instrumentation connections
- •Space-constrained applications
- •Compact manifold designs
Lap Joint Flanges
Specialty flanges that work with a stub end, allowing easy removal without disturbing the pipe run. Used primarily in systems requiring frequent disconnection for maintenance or modifications.
Common Applications:
- •Frequent maintenance access
- •Changeover applications
- •Experimental or temporary systems
- •Specialized processing plants
Orifice Flanges
Specifically designed flanges with tapped holes for orifice plate installation and pressure taps. Engineered for accurate flow measurement in custody transfer and process control applications.
Common Applications:
- •Flow measurement systems
- •Custody transfer applications
- •Process control monitoring
- •Differential pressure measurement
Spectacle Flanges
Innovative design combining a blind section with a ring section in a single component. Allows quick switching between full isolation and open flow without breaking the connection.
Common Applications:
- •Isolation and bypass operations
- •Maintenance and inspection shutdowns
- •Process line switching
- •Variable flow requirements
Long Weld Neck Flanges
Extended bore weld neck flanges for applications requiring longer hub engagement with the pipe. Provides additional reinforcement for extreme pressure or temperature conditions.
Common Applications:
- •Ultra-high pressure systems
- •Cryogenic service
- •Extreme temperature applications
- •Critical hydrocarbon processing
Plate Flanges
Large-diameter flanges cut from flat plate to AWWA C207 (steel pipe flanges) or AWWA C228 (stainless steel) patterns, often matching ASME B16.1 / B16.5 bolt circles. Economical for water, wastewater, and low-pressure service.
Common Applications:
- •AWWA C207 / C228 water and wastewater service
- •Municipal pipeline and treatment plant flanges
- •Low-pressure large-bore connections (4" to 144")
- •Custom drilling to match existing patterns
Pressure Class Specifications
Flanges available in all standard pressure classes from 150 through 2500 ANSI rating. Max temperatures shown apply to Group 1.1 carbon steel (A105) per ASME B16.5; service ratings vary by material group.
| Pressure Class | Max Temperature | Typical Applications |
|---|---|---|
| 150 | 650°F | Low-pressure systems, utility service |
| 300 | 750°F | Industrial piping, general process systems |
| 600 | 850°F | High-pressure applications, elevated temperature |
| 900 | 950°F | Very high pressure, extreme temperature |
| 1500 | 1050°F | Ultra-high pressure, critical applications |
| 2500 | 1100°F | Maximum pressure systems, specialized applications |
Size Range & Standards
Available Sizes
We supply flanges across the complete industry size range from small bore instrumentation connections through ultra-large diameter applications.
- Small Diameter:1/2" to 4"
- Standard Range:6" to 24"
- Large Diameter:30" to 60"+
ASME Standards
- ASME B16.5
Pipe flanges up to 24" NPS
- ASME B16.47
Large diameter flanges 26" to 60"+
- MSS SP-44
Stainless steel pipe flanges
Custom Capabilities
- ✓ Custom bolt hole patterns
- ✓ Non-standard bores
- ✓ Overbore flanges
- ✓ Special facings (RTJ, flat)
- ✓ Weld overlay applications
- ✓ Exotic material options
Material Selection
Choose the right material for your pressure and temperature requirements.
Comprehensive Standards Support
All flanges supplied with full traceability, material certs, and dimensional verification per applicable standards.
Ready to Order Your Flanges?
Provide your specifications-type, size, pressure class, material, and quantity-and our team will deliver accurate quotes and rapid delivery.
Request Flange Quote