Web Menu

Product Search

Language

Share

Corrosion Resistant Duplex Steel 2205 Socket Welding Flanges custom

Corrosion Resistant Duplex Steel 2205 Socket Welding Flanges Manufacturers

-- Steady & Reliable Manufacturer --

Dual-Phase Socket Welding Flange Solutions

In small-diameter piping systems where high pressure and corrosive fluids intersect, Socket Welding Flanges (SWF) provide an ideal, leak-proof solution. Our Duplex Steel 2205 (S31803/S32205) Socket Welding Flanges combine the best properties of both austenitic and ferritic steels. This "duplex" structure provides nearly double the yield strength of standard 316L stainless steel, along with exceptional resistance to pitting and crevice corrosion. The socket weld design allows for a smooth internal bore, which is critical for preventing fluid entrapment and localized corrosion. As a professional manufacturer, we precision-machine the socket depth and diameter to ensure a perfect fit for high-pressure chemical and maritime lines, where the integrity of a single joint can determine the safety of the entire operation.

Categories

Product

Technical Specifications Table

ParameterDuplex 2205 Specification
Material GradeASTM A182 F51 / UNS S31803 / S32205
StandardsASME B16.5, BS 3799
Pressure ClassClass 150, 300, 600, 1500, 2500
Size Range1/2" to 3" (Standard for SW types)
PREN Value≥ 34 (Pitting Resistance Equivalent Number)
Surface FinishMachined, Passivated, and Pickled

Advanced Corrosion Applications

Duplex 2205 Socket Welding Flanges are widely utilized in chemical processing plants for handling organic acids, chlorides, and caustic solutions. They are a primary choice for seawater reverse osmosis (SWRO) desalination systems, where their resistance to chloride-induced pitting is essential. In the oil and gas industry, they are used in subsea hydraulic control lines and chemical injection skids where high pressure and saltwater exposure are constant. They are also favored in the pulp and paper industry for bleach plant equipment and in wastewater treatment for handling aggressive industrial effluents. Their high strength allows for more compact and lighter piping designs in offshore environments, where weight reduction is a critical factor for structural engineering on platforms and FPSOs.

Duplex Steel Advantages

  • Superior Stress Corrosion Cracking (SCC) Resistance: Far outperforms standard 300-series stainless steels in halide-rich environments.
  • High Mechanical Strength: High yield strength allows for higher pressure ratings or reduced wall thickness in system design.
  • Efficient Small-Diameter Connections: Socket weld design simplifies installation in tight spaces while maintaining high pressure-bearing capacity.
  • Molybdenum Enhancement: High Mo and Cr content provides excellent resistance to localized corrosion in stagnant seawater.

Payment & Shipping Standards

We accept payment through T/T, PayPal (for sample orders), and Irrevocable L/C. Since Duplex 2205 is a high-value alloy, we treat every flange with extreme care. Each component is individually wrapped in protective film and packed in high-density foam-lined cartons or plywood crates to prevent surface scratching during sea transit. We provide 3.1 Mill Test Certificates and PMI reports as standard for all duplex orders to guarantee chemical composition compliance. For urgent offshore or refinery repairs, we offer worldwide express air freight. Our logistics team is expert in ensuring all customs documentation for alloy exports is processed accurately for fast site delivery.

  • Q: Why use a Socket Weld flange instead of a Slip-On for small pipes?
  • A: Socket weld flanges provide better flow characteristics and a stronger joint for small-diameter, high-pressure pipes where a butt weld might be difficult to perform.
  • Q: Is Duplex 2205 suitable for very low temperatures?
  • A: It has good toughness down to -50°C, but for cryogenic applications below that, austenitic stainless steels like 316L are usually preferred.
Contact form
Contact Us
Jiangyin Gaoxin Pipe Fittings Co., Ltd.
About Us
JIANGYIN GAOXIN PIPE FITTINGS CO.,LTD.
Our company is a professional manufacturer of pressure piping components. As Corrosion Resistant Duplex Steel 2205 Socket Welding Flanges Manufacturers，Our product range covers butt-weld, socket-weld, and threaded pipe fittings, including flanges and customized non-standard parts. These products are widely used in industries such as oil & gas, chemical processing, power generation, shipbuilding, papermaking, metallurgy, pharmaceuticals, and food processing. We manufacture according to standards such as ASME, EN,JIS,DIN,ANSI,GOST, MSS, GB/T,HG, DL, SH, SY,and have a complete range of inspection equipment, a strict quality control system, and various certifications（PED,AD2000,EAC, ABS,BV, DNV,NORSOK M650, ISO9001,ISO14001,ISO45001,etc.）, making us a leader in the industry.

Related TAG