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Quality 2205 Duplex Stainless Steel Pipe 1/8" - 36" OD For Chemical Industry factory
Quality 2205 Duplex Stainless Steel Pipe 1/8" - 36" OD For Chemical Industry factory

2205 Duplex Stainless Steel Pipe 1/8" - 36" OD For Chemical Industry

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
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Molybdenum Alloy Stainless Steel Pipe

Stainless Steel Pipe Chloride Resistance

2205 Duplex Stainless Steel Pipe
Product Summary
Duplex stainless steel pipe for the chemical industry is specifically engineered to withstand the aggressive corrosive environments, high pressures, and elevated temperatures commonly encountered in chemical processing facilities. The unique two-phase microstructure (austenite + ferrite) combined ...

Product Details

Highlight:

2205 Duplex Stainless Steel Pipe

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Duplex Stainless Steel Pipe 1/8"

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2205 Stainless Steel Pipe 36"
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH)
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

Duplex stainless steel pipe for the chemical industry is specifically engineered to withstand the aggressive corrosive environments, high pressures, and elevated temperatures commonly encountered in chemical processing facilities. The unique two-phase microstructure (austenite + ferrite) combined with high chromium, molybdenum, and nitrogen content provides exceptional resistance to a wide range of organic and inorganic chemicals.

Our duplex pipes are widely specified for chemical plants, petrochemical facilities, refineries, and specialty chemical manufacturing where standard austenitic grades such as 304 and 316 experience pitting, stress corrosion cracking, or general corrosion failure.

Product Specifications
Parameter Details
Standard ASTM A790, A789, A928, EN 10216-5, EN 10217-7, ASME B31.3
Grades 2205 (UNS S31803, S32205), 2507 (UNS S32750), 2304 (UNS S32304)
Size (OD) 6.0 mm – 914 mm (1/8" – 36")
Wall Thickness Schedule 5S, 10S, 40S, 80S, 160 (1.0 mm – 25.0 mm)
Length 3000 mm, 6000 mm, random lengths, custom cut
Process Seamless (for small diameters and high pressure) or Welded (for larger diameters)
Surface Finish Annealed and pickled, Bright annealed, Mechanically polished
End Finish Plain ends, Beveled ends (for welding), Threaded
Chemical Composition by Grade (Reference %)
Element 2304 (Lean) 2205 (Standard) 2507 (Super)
Carbon (C) ≤ 0.030 0.030 0.030
Silicon (Si) ≤ 1.00 1.00 0.80
Manganese (Mn) ≤ 2.50 2.00 1.20
Phosphorus (P) ≤ 0.035 0.030 0.035
Sulfur (S) ≤ 0.020 0.020 0.020
Chromium (Cr) 21.5 – 24.5 22.0 – 23.0 24.0 – 26.0
Nickel (Ni) 3.0 – 5.5 4.5 – 6.5 6.0 – 8.0
Molybdenum (Mo) 0.05 – 0.60 3.0 – 3.5 3.0 – 5.0
Nitrogen (N) 0.05 – 0.20 0.14 – 0.20 0.24 – 0.32
Copper (Cu) — — ≤ 0.50
Mechanical Properties
Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HB)
2304 ≥ 600 ≥ 400 ≥ 25 ≤ 290
2205 ≥ 620 ≥ 450 ≥ 25 ≤ 290
2507 ≥ 730 ≥ 550 ≥ 20 ≤ 310

Note: The values above are for reference only. Please refer to the mill test certificate for actual data.

Chemical Resistance Guide
Chemical Environment 304/316 2304 2205 2507
Acetic Acid (up to 100%) Good Good Excellent Excellent
Citric Acid Good Good Excellent Excellent
Formic Acid (up to 50%) Poor Fair Good Good
Lactic Acid Good Good Excellent Excellent
Nitric Acid (up to 65%) Good Good Good Good
Phosphoric Acid (up to 85%) Fair Good Excellent Excellent
Sulfuric Acid (dilute) Poor Poor Fair Good
Sulfuric Acid (concentrated) Poor Poor Poor Fair
Caustic Soda (NaOH) Good Good Good Good
Chlorides / Brine Poor Fair Good Excellent
Organic Solvents Excellent Excellent Excellent Excellent
Seawater / Brackish Water Poor Fair Good Excellent
Key Features for Chemical Industry

Stress Corrosion Cracking Resistance – Ferrite phase stops SCC propagation in chloride environments

High Pitting Resistance – PREN of 25-45 protects against localized attack

High Strength – Allows for thinner wall sections, reducing weight and cost

Good Weldability – Can be fabricated into complex piping systems

Wide Temperature Range – Suitable for cryogenic to elevated temperatures

Low Carbon Content – Prevents intergranular corrosion after welding

ASME B31.3 Compliant – Suitable for process piping

PREN Values by Chemical Service
Grade PREN Recommended Chemical Service
2304 24 – 26 Mild acids, food processing, clean chemicals
2205 33 – 35 Organic acids, phosphoric acid, chloride-containing streams
2507 ≥ 41 Sulfuric acid (dilute), high chloride acids, severe environments
Typical Chemical Industry Applications
Application Recommended Grade Reason
Organic Acid Transfer Lines 2205 Resists acetic, formic, and lactic acids
Phosphoric Acid Piping 2205 Excellent resistance to wet process phosphoric acid
Chloride-Containing Process Streams 2205 or 2507 SCC and pitting protection
Heat Exchanger Tubing 2205 High strength allows thinner walls, better heat transfer
Caustic Service Lines 2304 or 2205 Good resistance to sodium hydroxide
Solvent Recovery Systems 2304 Cost effective for non-corrosive organics
Brine / Salt Processing 2507 Superior chloride pitting resistance
Fertilizer Plant Piping 2205 Phosphoric and sulfuric acid resistance
Amine Service (CO₂ / H₂S removal) 2205 (NACE) Sour service certified
Distillation Column Feed Lines 2205 High temperature strength and corrosion resistance
Temperature Limits for Chemical Service
Grade Minimum Temperature Maximum Continuous Maximum Intermittent
2304 -40°C (-40°F) 250°C (482°F) 280°C (536°F)
2205 -50°C (-58°F) 280°C (536°F) 300°C (572°F)
2507 -50°C (-58°F) 280°C (536°F) 300°C (572°F)

Avoid prolonged exposure above 300°C as this can cause embrittlement of the ferrite phase.

Chemical Plant Piping Specifications
Requirement Duplex Pipe Compliance
ASME B31.3 Process Piping Yes
Pressure Design Higher allowable stress than austenitic (up to 2x)
Wall Thickness Reduction 30-50% thinner than 304/316 for same pressure
Corrosion Allowance Minimal or none required
Flange Ratings Compatible with standard ASME flanges
Gasket Selection PTFE, spiral wound, graphite (avoid chlorides)
Fabrication Considerations for Chemical Plants
Process Recommendation
Welding Use matching filler metal (2209 for 2205). Back purge with argon. Control interpass temperature below 150°C.
Bending Cold bending preferred. Minimum radius 3x OD for seamless, 4x OD for welded.
Heat Treatment Solution anneal at 1040-1100°C after significant cold work.
Pickling / Passivation Required after welding to restore corrosion resistance. Use nitric-hydrofluoric acid blend.
Flange Joint Assembly Use controlled torque. Avoid galvanized or low alloy bolting.
Hydrotesting Use clean fresh water with ≤ 50 ppm chlorides. Dry thoroughly after testing.
Contact Us

Planning a chemical plant project? We can supply the right duplex pipe for your process conditions.

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