ASTM A815 WPS32205-S 180 Degree Return Bend For Chemical Processing Plants

ASTM A815 WPS32205-S refers to a 180-degree return bend made from duplex stainless steel UNS S32205 (also known as 2205) conforming to the ASTM A815 standard. Here’s a detailed breakdown:

1. Material ASTM A815 WP S32205-S

(1). Chemical Composition (ASTM A815 WP S32205-S)

The composition ensures corrosion resistance, strength, and weldability.

Note: Some traces of Copper (Cu) and Tungsten (W) may be present but are not mandatory.

(2). Mechanical Properties (ASTM A815 WP S32205-S)

Duplex 2205 offers high strength and toughness due to its austenitic-ferritic microstructure.

Additional Notes:

Heat Treatment: Solution annealed at 1025–1125°C (1875–2050°F) followed by rapid cooling.

Pitting Resistance Equivalent (PREN): ~35–40 (PREN = %Cr + 3.3(%Mo + 0.5%W) + 16%N).

3. 180-Degree Return Bend

• A pipe fitting that changes direction by 180 degrees, forming a U-shape.
• Used to reverse flow direction in piping systems while maintaining a compact layout.
• Typically made via hot forming or cold bending processes.

4. Key Features

• Pressure Rating: Suitable for high-pressure applications.
• End Connections: Butt-welded ends for seamless integration into piping systems.
• Corrosion Resistance: Ideal for aggressive environments (e.g., seawater, acidic/alkaline media).
• Dimensional Compliance: Follows ASME B16.9 or other relevant standards.

5. Comparison with Other Materials

6. Key Standards & Specifications

• ASTM A815 – Covers duplex stainless steel fittings.
• ASME B16.9 – Dimensions for factory-made butt-welding bends.
• NACE MR0175/ISO 15156 – Approved for sour service (H₂S environments).

The ASTM A815 WP S32205-S Stainless Steel 180-Degree Return Bend (made from Duplex 2205, UNS S32205) is used in demanding environments where high strength, corrosion resistance, and pressure integrity are critical. Below are its key applications:

1. Oil & Gas Industry

• Offshore & Subsea Pipelines – Resists chloride stress corrosion cracking (SCC) in seawater.
• Downhole & Wellhead Equipment – Handles H₂S (sour gas) and CO₂ in aggressive well fluids.
• Flow Lines & Risers – High-pressure U-bends for directional changes in piping.

2. Chemical & Petrochemical Processing

• Acid & Alkaline Transport – Resists sulfuric, phosphoric, and organic acids.
• High-Temperature Lines – Used in heat exchangers, reactors, and condensers.
• Chloride-Rich Environments – Ideal for bleach, chlorine, and brine handling.

3. Desalination & Water Treatment

• Seawater Reverse Osmosis (SWRO) Plants – Resists pitting/crevice corrosion.
• Brine Recirculation Lines – 180° bends in high-salinity systems.

4. Power Generation

• Cooling Water Systems – Used in nuclear, thermal, and offshore power plants.
• Flue Gas Desulfurization (FGD) – Resists wet sulfuric acid environments.

5. Marine & Shipbuilding

• Ballast & Bilge Systems – Prevents corrosion in saltwater piping.
• Exhaust Scrubbers – Handles acidic washwater in emission control systems.

6. Pulp & Paper Industry

• Bleach Plants & Digesters – Withstands corrosive chlorine dioxide (ClO₂) liquors.

Why Choose Duplex 2205 (S32205) for 180° Return Bends?

✅ Superior Strength – 2x stronger than standard 304/316 stainless steel.
✅ Corrosion Resistance – Excellent against pitting, SCC, and erosion.
✅ Cost-Effective – Longer lifespan than austenitic steels in harsh conditions.
✅ Compact Design – 180° bends minimize space in piping layouts.

Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories,  the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always.   The factories already got certificates like : ABS, LR, DNV-GL, BV, KR, CCS, ASME, ISO 9001, ISO14001, ISO18001, ect.

Our factories main products as below : 
Factory 1th: Stainless steel seamless tube, Duplex steel seamless tube, Super duplex steel seamless tube, Nickel alloy steel seamless tube;

Factory 2th: Carbon steel seamless tube, Alloy steel seamless tube; Enhanced Heat Tranfer Tube, low fin tube ,U bending workshop;
Factory 3th: High frequency welding fin tube(HFW fin tube, Solid Fin tube, Studded Tube, Serrated Fin tube, Longitudinal welding fin tube), Wound fin tube(L type fin tube, LL type fin tube,  KL type fin tube), Embedded G type fin tube , Extruded fin tube,  low fin tube, U bend & 180deg. Return;

Yuhong Holding Group also has gained rich experience for project package( products contain:Pipes, Fittings, Flanges, heat exchanger, furnace, fired heater, air cooler, boiler) , YUHONG brand has marked its global presence in more than 85 countries, like, Korea, USA, Canada, Mexico, Colombia, Bolivia, Chile, Argentina, Brazil, Ecuador, Austria, New Zealand, Singapore, Malasyia, Indonesia, Thailand, Vietnam, Ukraine, Turkey,Sauid Arabia, Qatar, U.A.E,Israel,India, UK, France, Italy, Gernmany, Poland, Spain,... We have successfully implemented the orders of Cross Country Pipelines for our valuable customers. In addition, we have also developed a huge network of contacts and strategic alliances with most important manufacturers as stockists around the world.