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Quality High Pressure Duplex Stainless Steel Pipe 550 MPa Yield Strength Corrosion Resistance factory
Quality High Pressure Duplex Stainless Steel Pipe 550 MPa Yield Strength Corrosion Resistance factory

High Pressure Duplex Stainless Steel Pipe 550 MPa Yield Strength Corrosion Resistance

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

High Pressure Duplex Stainless Steel Pipe
Product Summary
High pressure duplex stainless steel pipe is specifically designed and manufactured to withstand extreme internal pressures while maintaining structural integrity and corrosion resistance. The unique two-phase microstructure (austenite + ferrite) provides approximately twice the yield strength of ...

Product Details

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High Pressure Duplex Stainless Steel Pipe

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Duplex Stainless Steel Pipe 550 MPa

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Duplex SS Pipe Corrosion Resistance
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

High pressure duplex stainless steel pipe is specifically designed and manufactured to withstand extreme internal pressures while maintaining structural integrity and corrosion resistance. The unique two-phase microstructure (austenite + ferrite) provides approximately twice the yield strength of standard austenitic stainless steels such as 304 and 316, allowing for significantly thinner wall sections at equivalent pressure ratings.

Our high pressure duplex pipes are produced seamless (preferred for high pressure service) and are suitable for applications ranging from hydraulic systems and chemical injection lines to subsea control systems and high pressure oil and gas production.

Product Specifications
Parameter Details
Standard ASTM A789, A790, ASME SA790, NACE MR0175, API 5LC, ISO 13628
Grades 2205 (UNS S31803, S32205), 2507 (UNS S32750), S32760
Size (OD) 6.35 mm – 254 mm (1/4" – 10") – seamless
Wall Thickness 1.0 mm – 25.0 mm
Length 3000 mm, 6000 mm, random lengths, custom cut
Process Seamless (cold drawn / cold rolled) – welded not recommended for high pressure
Surface Finish Annealed and pickled, Bright annealed, Mechanically polished
End Finish Plain ends, Beveled ends, Threaded and coupled, Integral connections
Chemical Composition by Grade (Reference %)
Element 2205 (S32205) 2507 (S32750) S32760
Carbon (C) ≤ 0.030 0.030 0.030
Chromium (Cr) 22.0 – 23.0 24.0 – 26.0 24.0 – 26.0
Nickel (Ni) 4.5 – 6.5 6.0 – 8.0 6.0 – 8.0
Molybdenum (Mo) 3.0 – 3.5 3.0 – 5.0 3.0 – 4.0
Nitrogen (N) 0.14 – 0.20 0.24 – 0.32 0.20 – 0.30
Tungsten (W) — — 0.50 – 1.00
Copper (Cu) — ≤ 0.50 0.50 – 1.00
Mechanical Properties (Critical for High Pressure)
Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HB) Max HRC (NACE)
2205 ≥ 620 (90 ksi) ≥ 450 (65 ksi) ≥ 25 ≤ 290 ≤ 28
2507 ≥ 730 (106 ksi) ≥ 550 (80 ksi) ≥ 20 ≤ 310 ≤ 28
S32760 ≥ 730 (106 ksi) ≥ 550 (80 ksi) ≥ 25 ≤ 310 ≤ 28

Note: The values above are minimum requirements. Higher strengths available upon request.

High Pressure Capability Comparison
Grade Yield Strength (MPa) Relative Wall Thickness (vs 316L) Maximum Operating Pressure*
316L (Austenitic) ≥ 205 1.00x (baseline) Moderate
2304 (Lean Duplex) ≥ 400 0.51x High
2205 (Standard Duplex) ≥ 450 0.46x Very High
2507 (Super Duplex) ≥ 550 0.37x Extremely High

At equivalent OD and pressure rating, duplex pipe requires approximately 40-50% thinner wall than 316L.

Example: Pressure Rating Comparison

Same OD (25.4 mm / 1")

Grade Wall Thickness Calculated Burst Pressure (approx.)
316L 3.0 mm 45 MPa (6,500 psi)
2205 3.0 mm 100 MPa (14,500 psi)
2205 2.0 mm 65 MPa (9,400 psi)
2507 2.0 mm 85 MPa (12,300 psi)

Burst pressures are theoretical estimates. Actual pressure ratings must be calculated per ASME B31.3 or applicable code.

Key Features for High Pressure Service
  • High Yield Strength – Up to 550 MPa minimum (80 ksi) for 2507 grade
  • Seamless Construction – No weld seam eliminates potential failure points
  • Excellent Fatigue Resistance – Suitable for cyclic pressure applications
  • Corrosion Resistance – Maintains integrity in corrosive high pressure environments
  • Good Toughness – Retains impact resistance at low temperatures
  • NACE MR0175 Compliant – Suitable for sour high pressure service
  • Precision Dimensions – Tight tolerances for pressure containing applications
Pressure Rating Calculation (ASME B31.3)

For seamless duplex pipe, allowable stress values per ASME B31.3:

Grade Allowable Stress (MPa) up to 300°C
2205 138 – 158 (dependent on temperature)
2507 166 – 186 (dependent on temperature)

Allowable stress is approximately 2-2.5x higher than 316L (69-79 MPa at room temperature).

Applications for High Pressure Duplex Pipe
Application Typical Pressure Range Recommended Grade
Chemical Injection Lines 10,000 – 20,000 psi 2205 or 2507
Subsea Umbilical Tubes 5,000 – 15,000 psi 2205 or 2507
Downhole Control Lines 10,000 – 20,000 psi 2507
Hydraulic Systems 3,000 – 10,000 psi 2205
Wellhead Control Panels 5,000 – 15,000 psi 2205
High Pressure Process Piping 1,500 – 6,000 psi 2205
Hydrotesting Lines Up to 25,000 psi 2507
Instrumentation Tubing 3,000 – 10,000 psi 2205
Sour High Pressure Gas 5,000 – 15,000 psi 2205 / 2507 (NACE)
Sour Service for High Pressure (NACE MR0175)

For high pressure applications containing hydrogen sulfide (H₂S):

Requirement 2205 2507
Maximum Hardness (HRC) ≤ 28 ≤ 28
Maximum H₂S Partial Pressure 10 psi (70 kPa) 10 psi (70 kPa)
Maximum Operating Pressure Limited by code Limited by code
SSC Resistance Required and certified Required and certified
NACE Region 0, 1, 2, 3 0, 1, 2, 3
Temperature Limits for High Pressure Service
Grade Minimum Temperature Maximum Continuous Derating Begins
2205 -50°C (-58°F) 300°C (572°F) > 250°C
2507 -50°C (-58°F) 300°C (572°F) > 250°C

Above 250°C, allowable stress values decrease. Consult ASME B31.3 for derating factors.

Dimensions and Tolerances (Seamless High Pressure)
OD (mm) OD Tolerance (mm) Wall Thickness Tolerance
6.35 – 12.70 ± 0.10 ± 10%
12.70 – 25.40 ± 0.13 ± 10%
25.40 – 50.80 ± 0.15 ± 12.5%
50.80 – 101.60 ± 0.20 ± 12.5%
Contact Us

Need high pressure duplex pipe for a demanding application? We can supply.

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