2205 Stainless Steel Pipe Pressure Rating Chart
Oct 12, 2026
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If you are looking for 2205 stainless steel pipe pressure ratings, the most important factors are not only the pipe grade but also outside diameter, wall thickness, schedule, temperature, manufacturing method, and design standard. Many buyers make purchasing decisions based only on SCH40 or SCH80, but the actual allowable working pressure can vary significantly depending on pipe dimensions and operating conditions.
What is the maximum pressure rating of 2205 stainless steel pipe?
The maximum pressure rating depends on pipe size, schedule (wall thickness), and operating temperature. At ambient temperature, a small-diameter thick-wall 2205 pipe (e.g., 1" SCH 160) can exceed 7,600 psig. Larger pipes with thinner walls have proportionally lower ratings. Always refer to the specific size/schedule chart and applicable design code.
The allowable pressure depends on several factors:
1.Pipe outside diameter
2.Wall thickness (pipe schedule)
3.Operating temperature
4.Material allowable stress
5.Applicable design standard
How to Calculate 2205 Stainless Steel Pipe Pressure Rating?
P = (2 × S × t × E) / (D − 2 × t × Y)
Where:
P = Internal design pressure (psi / MPa)
S = Allowable stress value at design temperature (psi / MPa)
t = Nominal wall thickness (in / mm)
D = Outside diameter of pipe (in / mm)
E = Longitudinal weld joint efficiency factor (seamless = 1.0)
Y = Temperature-dependent coefficient (0.4 for ferritic steels below 900°F)
2205 Stainless Steel Pipe Pressure Rating Chart
The following table provides MAWP values (in psig) for common 2205 seamless stainless steel pipe sizes across standard schedules at various operating temperatures. Values are based on ASME B31.3 allowable stress for UNS S32205 seamless pipe (E=1.0) and include standard wall thicknesses per ANSI/ASME B36.19.
| Nominal Size (in) |
Schedule (SCH) |
OD (in) |
Wall (in) |
Pressure Rating at Temperature (°F) - psig | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100°F | 200°F | 300°F | 400°F | 500°F | 600°F | 650°F | 700°F | 750°F | ||||
| Allowable Stress S (psi) | 16,700 | 16,700 | 16,700 | 15,500 | 14,400 | 13,500 | 13,200 | 12,900 | 12,600 | |||
| 1" | 40 | 1.315 | 0.133 | 3,730 | 3,730 | 3,730 | 3,463 | 3,217 | 3,016 | 2,949 | 2,882 | 2,815 |
| 80 | 1.315 | 0.179 | 5,228 | 5,228 | 5,228 | 4,853 | 4,509 | 4,227 | 4,133 | 4,039 | 3,945 | |
| 160 | 1.315 | 0.250 | 7,671 | 7,671 | 7,671 | 7,121 | 6,616 | 6,203 | 6,065 | 5,927 | 5,789 | |
| 1½" | 40 | 1.900 | 0.145 | 2,728 | 2,728 | 2,728 | 2,532 | 2,353 | 2,206 | 2,157 | 2,108 | 2,059 |
| 80 | 1.900 | 0.200 | 3,854 | 3,854 | 3,854 | 3,577 | 3,324 | 3,116 | 3,047 | 2,978 | 2,909 | |
| 160 | 1.900 | 0.281 | 5,626 | 5,626 | 5,626 | 5,222 | 4,851 | 4,548 | 4,447 | 4,346 | 4,245 | |
| 2" | 40 | 2.375 | 0.154 | 2,295 | 2,295 | 2,295 | 2,130 | 1,980 | 1,856 | 1,815 | 1,774 | 1,733 |
| 80 | 2.375 | 0.218 | 3,324 | 3,324 | 3,324 | 3,085 | 2,867 | 2,688 | 2,628 | 2,568 | 2,509 | |
| 160 | 2.375 | 0.344 | 5,494 | 5,494 | 5,494 | 5,099 | 4,737 | 4,441 | 4,343 | 4,244 | 4,146 | |
| 3" | 40 | 3.500 | 0.216 | 2,179 | 2,179 | 2,179 | 2,023 | 1,879 | 1,762 | 1,723 | 1,684 | 1,645 |
| 80 | 3.500 | 0.300 | 3,094 | 3,094 | 3,094 | 2,872 | 2,668 | 2,502 | 2,446 | 2,391 | 2,335 | |
| 160 | 3.500 | 0.438 | 4,674 | 4,674 | 4,674 | 4,339 | 4,031 | 3,779 | 3,695 | 3,611 | 3,527 | |
| 4" | 40 | 4.500 | 0.237 | 1,841 | 1,841 | 1,841 | 1,709 | 1,588 | 1,489 | 1,456 | 1,423 | 1,390 |
| 80 | 4.500 | 0.337 | 2,672 | 2,672 | 2,672 | 2,480 | 2,304 | 2,160 | 2,112 | 2,064 | 2,016 | |
| 160 | 4.500 | 0.531 | 4,364 | 4,364 | 4,364 | 4,050 | 3,763 | 3,528 | 3,450 | 3,371 | 3,293 | |
| 6" | 40 | 6.625 | 0.280 | 1,466 | 1,466 | 1,466 | 1,361 | 1,264 | 1,186 | 1,159 | 1,133 | 1,107 |
| 80 | 6.625 | 0.432 | 2,306 | 2,306 | 2,306 | 2,140 | 1,988 | 1,864 | 1,823 | 1,781 | 1,740 | |
| 160 | 6.625 | 0.719 | 3,979 | 3,979 | 3,979 | 3,694 | 3,432 | 3,218 | 3,147 | 3,075 | 3,004 | |
| 8" | 40 | 8.625 | 0.322 | 1,286 | 1,286 | 1,286 | 1,193 | 1,109 | 1,040 | 1,017 | 994 | 971 |
| 80 | 8.625 | 0.500 | 2,036 | 2,036 | 2,036 | 1,890 | 1,756 | 1,646 | 1,610 | 1,573 | 1,537 | |
| 160 | 8.625 | 0.906 | 3,838 | 3,838 | 3,838 | 3,563 | 3,310 | 3,104 | 3,035 | 2,966 | 2,897 | |
| 10" | 40 | 10.750 | 0.365 | 1,165 | 1,165 | 1,165 | 1,081 | 1,005 | 942 | 921 | 900 | 879 |
| 80 | 10.750 | 0.594 | 1,932 | 1,932 | 1,932 | 1,793 | 1,666 | 1,562 | 1,527 | 1,492 | 1,458 | |
| 160 | 10.750 | 1.125 | 3,822 | 3,822 | 3,822 | 3,548 | 3,296 | 3,090 | 3,022 | 2,953 | 2,884 | |
| 12" | 40 | 12.750 | 0.406 | 1,085 | 1,085 | 1,085 | 1,007 | 936 | 877 | 858 | 838 | 819 |
| 80 | 12.750 | 0.688 | 1,876 | 1,876 | 1,876 | 1,741 | 1,618 | 1,517 | 1,483 | 1,450 | 1,416 | |
| 160 | 12.750 | 1.312 | 3,740 | 3,740 | 3,740 | 3,472 | 3,225 | 3,024 | 2,957 | 2,889 | 2,822 | |
2205 SCH40S vs SCH80S Pressure Comparison
For buyers selecting pipe schedules:
| Size | SCH40S | SCH80S |
|---|---|---|
| NPS 2" | Approx. 280 bar | Approx. 400 bar |
| NPS 3" | Approx. 260 bar | Approx. 380 bar |
| NPS 4" | Approx. 220 bar | Approx. 330 bar |
| NPS 6" | Approx. 180 bar | Approx. 270 bar |
SCH80S is preferred for higher-pressure applications because the increased wall thickness improves mechanical strength and corrosion allowance.
How does temperature affect 2205 pipe pressure rating?
Elevated temperatures reduce the allowable stress of 2205 duplex stainless steel, which directly reduces pressure capacity. From room temperature to 500°F (260°C), the allowable stress drops by approximately 14%. By 750°F (399°C), it drops by about 25%. Additionally, extended exposure above 570°F (300°C) can cause microstructural changes (sigma phase embrittlement) that further reduce toughness and corrosion resistance.
Allowable Stress Values for UNS S32205 (ASME B31.3)
| Temperature (°F) | Temperature (°C) | Allowable Stress S (psi) | Allowable Stress S (MPa) | Derating Factor | 0.2% Proof Strength (ksi) |
|---|---|---|---|---|---|
| 100 | 38 | 16,700 | 115.1 | 1.000 | 65.0 |
| 200 | 93 | 16,700 | 115.1 | 1.000 | 58.0 |
| 300 | 149 | 16,700 | 115.1 | 1.000 | 52.0 |
| 400 | 204 | 15,500 | 106.9 | 0.928 | 47.0 |
| 500 | 260 | 14,400 | 99.3 | 0.862 | 42.5 |
| 600 | 316 | 13,500 | 93.1 | 0.808 | 40.0 |
| 650 | 343 | 13,200 | 91.0 | 0.790 | 38.5 |
| 700 | 371 | 12,900 | 88.9 | 0.772 | 37.0 |
| 750 | 399 | 12,600 | 86.9 | 0.754 | 35.5 |
| 800 | 427 | 11,200 | 77.2 | 0.671 | 33.0 |
Maximum Continuous Service Temperature: 2205 duplex stainless steel is generally limited to 600°F (315°C) maximum continuous service. Extended exposure above 570°F (300°C) can cause precipitation of intermetallic phases (e.g., sigma phase), leading to loss of toughness and corrosion resistance. For prolonged service above 500°F, verify impact toughness requirements with your material supplier.
Quick Schedule Selection Reference
| Schedule | Typical Pressure Range* | Common Use Cases |
|---|---|---|
| SCH 10S | Up to ~800-1,200 psig | Low-pressure utility lines, water service, gravity flow |
| SCH 40S | ~1,100-3,700 psig | General process piping, medium pressure applications (most common) |
| SCH 80S | ~1,900-5,200 psig | High-pressure process lines, wellhead piping, high-temperature service |
| SCH 160 | ~3,700-7,700 psig | Very high pressure service, wellhead components, subsea systems |
| XXS | Higher than SCH 160 | Extreme high pressure, special applications |
*Range varies by pipe size and temperature. Smaller diameters have higher pressure ratings. Consult the detailed chart above for exact values.
2205 Duplex Stainless Steel Pipe Supplier, Manufacturer & Stockist
GNEE offers a complete range of 2205 duplex stainless steel pipes and tubing, conforming to international standards such as ASTM A790, ASTM A789, ASME SA790, and EN 1.4462. Our 2205 stainless steel pipes are available in various sizes, wall thicknesses, and surface finishes, providing excellent strength, corrosion resistance, and reliability for demanding applications including oil & gas, chemical processing, marine engineering, seawater desalination, and pressure piping systems.
1. Our services include:
Custom manufacturing: Customized pipe sizes, wall thicknesses, lengths, surface finishes, and processing services are available according to your project requirements, including cutting, polishing, heat treatment, and special dimensional requirements.
2. Comprehensive product data:
We provide detailed technical datasheets, chemical composition reports, mechanical property data, pressure rating charts, and dimensional specifications to help customers select the most suitable 2205 duplex stainless steel pipe for high-pressure and corrosive environments.
3. Global certifications:
Our products comply with international quality requirements and can be supplied with ISO 9001, SGS, BV, TÜV inspection reports, and EN 10204 3.1 Material Test Certificates, ensuring material traceability, quality consistency, and compliance with global industrial standards.
For more information or to request a quotation, please feel free to contact us. GNEE is committed to providing reliable 2205 duplex stainless steel pipe solutions with competitive pricing, stable supply, and professional technical support for worldwide customers.
ASTM A790 UNS S32205 Duplex Stainless Steel Pipe Chemical Composition
| Grade | S | Cr | C | Mn | Si | P | Mo | Ni | N |
|---|---|---|---|---|---|---|---|---|---|
| 2205 (UNS S32205) | Minimum | – | – | – | – | – | 3.0 | 4.5 | 0.14 |
| Maximum | 0.015 | 23.0 | 0.030 | 2.0 | 1.0 | 0.030 | 3.5 | 6.5 | 0.20 |
| Typical Value | ≤0.010 | 22.0 | 0.020 | 1.5 | 0.5 | ≤0.025 | 3.2 | 5.5 | 0.17 |
2205 Duplex Stainless Steel Pipe Mechanical Properties (ASTM A790)
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness Rockwell B (HRB) max | Brinell Hardness (HB) max |
|---|---|---|---|---|---|
| 2205 (UNS S31803/S32205) | 620 | 450 | 25 | 31* | 293 |
*Duplex 2205 has higher strength than conventional austenitic stainless steels such as 304/316 due to its ferritic-austenitic dual-phase structure. Hardness limits may vary according to ASTM A790 requirements.
Physical Properties of ASTM A790 UNS S32205 Duplex Stainless Steel Pipe
| Grade | Density (g/cm³) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (×10⁻⁶/K) | Thermal Conductivity (W/m·K) | Specific Heat (J/kg·K) | Electrical Resistivity (μΩ·cm) |
|---|---|---|---|---|---|---|
| 2205 Duplex Stainless Steel | 7.80 | 200 | 13.7 (20–100°C) | 19 | 500 | 84 |
2205 Stainless Steel Pipe – Payment Terms & Shipping Methods
| Item | Details |
|---|---|
| Product | 2205 Stainless Steel Pipe (Seamless & Welded) |
| Payment Terms | • T/T (30% advance payment, 70% balance before shipment) • T/T 100% before shipment (for small orders) • L/C at sight (acceptable for large-volume orders) • Other payment terms negotiable based on order value |
| Price Terms | FOB, CFR, CIF (as per Incoterms® 2020) |
| Shipping Methods | • Sea Freight – Main method for bulk orders (containers or break bulk) • Air Freight – For urgent or small-quantity orders • Rail Transport – Available for selected regions |
| Loading Port | Shanghai / Tianjin / Qingdao / Ningbo or other main Chinese ports |
| Packaging | • Plastic caps on both ends • Bundled with steel strips • Wooden cases or pallets for export packing • Custom packaging available on request |
| Delivery Time | • Stock items: 7–10 days • Customized production: 20–35 days |
| Shipping Documents | Commercial Invoice, Packing List, Bill of Lading, Mill Test Certificate (EN 10204 3.1), Certificate of Origin |
Please find attached the Mill Test Certificate for the 2205 stainless steel pipes we exported. Kindly review it.
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