Super Duplex Steel Flanges Manufacturer | API 6A S32750 / S32760 Flanges Supplier

   Super Duplex Steel Flanges Manufacturer

API 6A S32750 / S32760 Flanges for Oil & Gas Applications

High-performance super duplex steel flanges designed for extreme corrosion and high-pressure environments. Widely used in offshore, subsea, and oilfield systems.

• Standard: API 6A / ASTM A182
• Grades: S32750 (F53) / S32760 (F55)
• Pressure: Up to 20,000 PSI
• PREN: ≥ 40
• Custom Forging Available

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  Super Duplex Steel Flanges for Harsh Environments

Senrui manufactures super duplex stainless steel flanges for industries requiring high strength and superior corrosion resistance. Our flanges are engineered for offshore platforms, subsea pipelines, and high-chloride environments.

Available with custom sizes, pressure ratings, and specifications based on project requirements.

  Materials Based on Project Requirements

We don’t just offer standard materials — we match materials to application:

• A105 – for general high-pressure service
• LF2 – suitable for low temperature environments
• F51 / F53 – duplex stainless steel for corrosion resistance
• SS 304 / 316 – for standard industrial use

Custom materials can be produced based on drawings or technical specifications.

  What Is a Super Duplex Flange?

Super duplex flanges are made from advanced stainless steel alloys combining austenitic and ferritic structures. This dual-phase composition provides:

• High mechanical strength
• Excellent resistance to pitting and crevice corrosion
• Superior performance in chloride-rich environments

They are ideal for demanding applications such as seawater systems, offshore oil platforms, and subsea equipment.

  Super Duplex vs Duplex Flange

👉 Super duplex is preferred for high-corrosion and high-pressure environments.

  Available Types of Super Duplex Flanges

• Weld Neck Flange
• Blind Flange
• Slip On Flange
• Threaded Flange
• Socket Weld Flange
• API 6B Flange
• API 6BX Flange
• DSAF (Double Studded Adapter Flange)

👉 Explore more:

• API 6BX Flanges
• DSAF Flanges
• Weld Neck Flanges

  Chemical Composition (S32750)

Cr: 24.0–26.0%
Ni: 6.0–8.0%
Mo: 3.0–5.0%
N: 0.24–0.32%

  Mechanical Properties

• Tensile Strength: ≥ 800 MPa
• Yield Strength: ≥ 550 MPa
• Elongation: ≥ 15%
• Hardness: ≤ 32 HRC

  Applications

Super duplex steel flanges are widely used in:

• Offshore oil and gas platforms
• Subsea pipeline systems
• Desalination plants
• Chemical processing
• Marine engineering
• Heat exchangers

  Manufacturing Process

1. Raw Material Inspection
2. Forging
3. Heat Treatment
4. CNC Machining
5. Surface Finishing
6. Final Inspection

Inspection & Testing

• PMI Testing
• Ultrasonic Testing (UT)
• Radiographic Testing (RT)
• Penetrant Testing (PT)
• Dimensional Inspection

👉 Full inspection reports available

  Why Choose Senrui

• Professional forged flange manufacturer
• API standard production
• Custom drawings supported
• Fast delivery for urgent orders
• Strict quality control system

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  What is a super duplex flange?

A high-strength stainless steel flange with superior corrosion resistance used in offshore and high-pressure systems.

  What is the difference between duplex and super duplex?

Super duplex offers higher strength and better corrosion resistance, especially in chloride environments.

  What grades are available?

S32750 (F53) and S32760 (F55) are the most common grades.

  Can you customize flanges?

Yes, production is based on drawings and project specifications.

  Where are super duplex flanges used?

Used in offshore oil & gas, subsea pipelines, and marine applications.

  Looking for a Reliable Super Duplex Flange Supplier?

Send us your requirements, drawings, or specifications today.
Our team will provide fast quotation and professional technical support.

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