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Carbon Steel A694 Flanges

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Carbon Steel A694 Flanges

ASTM A694 Carbon Steel Flanges Manufacturer in the US – Nakoda Steel Industry

Nakoda Steel Industry is a premier ASTM A694 Carbon Steel Flanges Manufacturer in the United States, delivering precision-engineered flanges designed for high-pressure and corrosive environments. Our ASME SA105 and ASTM A694-compliant flanges are trusted in industries like oil and gas, chemical processing, and power generation, offering unmatched durability, machinability, and compliance with global standards.
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Engineered for Extreme Performance

ASTM A694 Carbon Steel Flanges are forged to withstand demanding conditions, balancing strength with corrosion resistance. Nakoda’s flanges excel in:

  • High-Pressure Systems: Resilient under extreme mechanical stress.
  • Thermal Stability: Maintain integrity in temperatures up to 550°C.
  • Oxidizing Media: Superior performance in nitric acid solutions due to low molybdenum content.

Comprehensive Range of ASTM A694 Flanges

We specialize in manufacturing flanges tailored to diverse industrial needs:

  1. ASTM A694 Carbon Steel Slip-On Flanges
  • Design: Ideal for systems requiring minimal alloying components.
  • Heat Treatment: Relies on thermal processing to enhance mechanical properties.
  1. ASME SA105 Carbon Steel Threaded Flanges
  • Application: Suitable for alkaline environments but cautious use in chloride-rich media.
  • Forming: Requires higher force for operations like cylinder bending.
  1. ASTM A694 Carbon Steel Socket Weld Flanges
  • Heat Treatment: Post-treatment rapid cooling (water/air) ensures stress relief and solution strengthening.
  1. ASME SA105 Carbon Steel Weld Neck Flanges
  • Special Annealing: Conducted at 500°C–550°C for unique high-temperature applications.
  1. ASTM A694 Carbon Steel Blind Flanges
  • Function: Seals piping systems with robust pressure resistance.

Additional Types:

  • ASME SA694 Lap Joint Flanges
  • ASTM A694 Ring Type Joint Flanges
  • Carbon Steel F65 Screwed Flanges
  • Carbon Steel Forged Flanges

Technical Specifications & Standards

Our flanges adhere to ASTM A694, ASME SA694, ANSI, DIN, EN, and BS standards, ensuring global interoperability.

Key Specifications:

  • Size Range: ½″ (15 NB) to 48″ (1200 NB)
  • Pressure Ratings: 150# to 2500#, PN6 to PN64
  • Flange Face Types: Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
  • Material Grades: ASTM A694, ASME SA694

Heat Treatment & Machinability

Heat Treatment Process:

  1. Solution Strengthening: Conducted at elevated temperatures followed by rapid quenching.
  2. Stress Relieving: Ensures dimensional stability under thermal cycling.

Machinability:

  • General Rule: ASME SA105 Lap Joint Flanges are harder to machine than standard austenitic steels due to higher hardness.
  • Exception: ASTM A694 Ring Type Joint Flanges offer exceptional machining properties despite alloy constraints.

Applications Across Industries

Nakoda’s ASTM A694 Flanges are integral to:

  1. Oil & Gas:
    • Weld Neck Flanges for offshore drilling rigs and pipelines.
    • Blind Flanges for refinery pressure vessels.
  2. Chemical Plants:
    • Threaded Flanges for sodium hydroxide systems (avoid chloride exposure).
  3. Power Generation:
    • Socket Weld Flanges for steam and coolant distribution.
  4. Water Infrastructure:
    • Slip-On Flanges for modular water treatment networks.

Rigorous Quality Assurance

Every flange undergoes stringent testing to meet global certifications:

Testing & Certifications:

  • EN 10204/3.1B Certification
  • NACE MR 01075 Compliance (for sour service environments)
  • Third-Party Inspections: SGS, TÜV, BV
  • Material Tests:
    • Mechanical: Tensile strength, hardness, flattening, and flaring tests.
    • Chemical: Spectro analysis and PMI (Positive Material Identification).
    • Corrosion Resistance: Pitting resistance and intergranular corrosion (IGC) tests.

Why Choose Nakoda Steel Industry?

  1. US-Based Manufacturing:
    • Streamlined logistics and rapid delivery across the United States.
  2. Global Compliance:
    • ASTM A694 and ASME SA694 standards for universal compatibility.
  3. Custom Solutions:
    • Tailored dimensions, pressure ratings, and surface finishes.
  4. Proven Durability:
    • Flanges engineered to resist thermal fatigue and stress corrosion.

Sustainable & Cost-Effective Solutions

Our flanges reduce lifecycle costs through:

  • Low Maintenance: Resistant to wear and environmental stressors.
  • Recyclability: Eco-friendly material supporting green manufacturing.
  • Longevity: Outperform standard steels in harsh conditions.

Partner with a US Leader

As a premier ASTM A694 Flanges Manufacturer in the US, Nakoda Steel Industry combines cutting-edge metallurgy with decades of expertise. From Slip-On Flanges for water systems to robust Weld Neck Flanges for offshore rigs, we deliver precision, compliance, and reliability.

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