Carbon Steel Flanges Manufacturer & Supplier - USA Piping Solution

In industrial piping, reliable connections are non-negotiable. USA Piping Solution is your dedicated manufacturer and supplier of Carbon Steel Flanges, focusing on solutions engineered for durability. We feature cornerstone grades like ASTM A105 and the cold-service capable ASTM A350 LF2, all built to handle the rigorous demands of modern industry.

What are Carbon Steel Flanges?

Carbon Steel Flanges are essential connectors in any robust piping system, joining pipes, valves, and pumps. Beyond simple linkage, they provide accessible points for maintenance, inspection, or system modifications – vital where pressures and temperature swings are common. The widespread use of CS Flanges stems from practical advantages:

• Economic Value: Often a more financially sound choice than specialized alloys without major performance sacrifices.
• Inherent Strength: Impressive mechanical properties to manage internal pressures and external stresses.
• Workability: Good machinability and weldability for common grades, easing installation.
• Versatile Application: Reliable performance across a broad temperature range suits numerous industrial settings.

Types of Carbon Steel Flanges Offered

Diverse industrial processes demand varied flange designs. USA Piping Solution offers a comprehensive lineup of Carbon Steel Flanges:

Weld Neck Flanges (WNRF)

Recognizable by their long, tapering hub, Carbon Steel Weld Neck Flanges offer superior reinforcement. Butt-welded to the pipe, they ensure high integrity for critical services involving high pressures, temperatures, or cyclic loading.

Slip On Flanges (SORF)

Carbon Steel Slip On Flanges slide over the pipe and are secured with two fillet welds. This design often simplifies alignment and can be more economical for moderate to lower-pressure applications.

Blind Flanges (BLRF)

Solid discs without a central bore, Carbon Steel Blind Flanges seal pipe ends, valves, or vessel nozzles. Essential for terminations or future access, they are rated for full system pressure.

Socket Weld Flanges

Featuring a recessed shoulder (socket), Socket Weld flanges are used with smaller bore piping in high-pressure systems where leak-tightness is crucial. The pipe is inserted and fillet welded externally.

Threaded Flanges

Offering a mechanical joint without welding, Threaded flanges (screwed flanges) have an internal NPT thread. Ideal for lower-pressure, ambient temperature services, or where welding is restricted.

Lap Joint Flanges

Used with a "stub end," Lap Joint flanges rotate freely over it, simplifying bolt alignment. Practical for systems needing frequent dismantling or when using expensive pipe materials (the flange doesn't touch the process fluid).

Spectacle Blinds & Ring Joint Flanges (RTJ)

• Spectacle Blinds: Safety devices for positive line isolation, combining a solid disc (blind) and an open ring (spacer).

• Ring Joint Flanges (RTJ): Designed for severe service, with a precision groove for a metallic ring gasket, creating a robust metal-to-metal seal for high-pressure, high-temperature duties.

Grades & Standards

Our Carbon Steel Flanges meet rigorous industry benchmarks. Key grades include:

• ASTM A105 Flanges: The industry standard for forged carbon steel flanges in ambient and higher-temperature pressure systems, known for good strength and weldability.
• ASTM A350 LF2 Flanges: For sub-zero conditions, these flanges undergo Charpy V-notch impact testing (often at -46°C/-50°F) to ensure toughness in cold environments.
• ASTM A694 F52 / F60 / F65: High-yield carbon and alloy steel forgings for high-pressure transmission pipelines (e.g., oil and gas). The "F" number indicates minimum yield strength (ksi).

Key Dimensional Standards:

• ANSI/ASME B16.5 Flanges: Covers NPS ½ to NPS 24, Classes 150 to 2500.
• ASME B16.47 Series A & B: For larger diameter flanges (NPS 26 to NPS 60).
• DIN, BS, JIS Standards: Available upon request for international project needs.

Size & Pressure Ratings

We support diverse system designs with a comprehensive range:

• Sizes: Standard stock from ½” to 60” (NPS). Custom sizes can be sourced or manufactured.
• Pressure Classes: Class 150, 300, 600, 900, 1500, and 2500 lbs.
• Flange Facings:
• Raised Face (RF): Most common, with a slightly elevated gasket surface.
• Flat Face (FF): Entire mating surface is flat, for lower pressures or mating with cast iron/non-metallic flanges.
• Ring Type Joint (RTJ): Machined groove for metallic ring gaskets, for high-pressure, high-integrity seals.

Applications & Industries Served

The adaptability of Carbon Steel Flanges makes them vital across sectors:

• Oil & Gas (Upstream, Midstream, Downstream)
• Power Generation (Thermal, Nuclear, Renewables)
• Shipbuilding & Marine
• Petrochemical Refineries
• Water Treatment Plants
• Infrastructure & Construction

Testing & Certifications

Quality assurance is integral at USA Piping Solution:

• Material Test Certificates (MTC) EN 10204 3.1/3.2: Provided for traceability and conformity.
• Comprehensive Testing:
• Positive Material Identification (PMI)
• Non-Destructive Testing (NDT): UT, MPI, DPI as required.
• Visual and Dimensional Inspections.
• ISO 9001:2015 Certified Operations: Underpinning our commitment to quality management.
• Third-Party Inspection (TPI): Facilitated with agencies like Lloyds, BV, DNV GL, SGS.

Why Choose USA Piping Solution?

Partnering with us means more than just components:

• Extensive Stock & Customization: Large inventory of standard CS Flanges (including ASTM A105 Flanges & ASTM A350 LF2 Flanges) plus custom manufacturing capabilities.
• Competitive Value & Global Logistics: Efficient operations ensure fair pricing with reliable worldwide delivery.
• Expert Support & Documentation: Technical guidance and comprehensive compliance paperwork.
• Reliable Quality & Timely Delivery: Commitment to superior products delivered on schedule.

Related Products

Complete your piping projects with our other offerings:

Final Call to Action

When your projects demand Carbon Steel Flanges engineered for lasting performance, connect with USA Piping Solution. Contact us for a detailed Request for Quotation (RFQ), and experience our commitment to rapid turnaround and dependable global support. We are ready to address all your Carbon Steel Flanges and piping component needs.

Request Your Carbon Steel Flanges Quote Today!