Pipe-Lok Vales & Fittings Company delivers precision-engineered instrumentation fittings and valves trusted for reliability, safety, and performance in industrial applications with a strong focus on engineering excellence and quality control.
Engineered for strong chloride corrosion resistance, high yield strength and dependable pressure protection. Duplex 2205 pressure relief valves are widely used in offshore, chemical, water treatment and process systems where austenitic stainless steels need higher strength and better resistance to pitting and stress corrosion cracking.
High-Performance Flow & Safety Instrumentation Solutions
Duplex 2205 combines chromium, nickel, molybdenum and nitrogen to provide a balanced ferritic-austenitic microstructure with excellent strength and chloride corrosion resistance.
| Element | Weight Percentage (%) |
|---|---|
| Chromium (Cr) | 22.0 - 23.0 |
| Nickel (Ni) | 4.5 - 6.5 |
| Molybdenum (Mo) | 3.0 - 3.5 |
| Nitrogen (N) | 0.14 - 0.20 |
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.030 max |
| Sulfur (S) | 0.020 max |
| Iron (Fe) | Balance |
*Composition limits are indicative for the listed grade family; applicable product specifications may vary depending on valve component and product form.
Duplex 2205 provides higher strength than common 300-series stainless steels while maintaining good toughness and corrosion resistance.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | 620 MPa min |
| 0.2% Yield Strength | 450 MPa min |
| Elongation | 25% min |
| Hardness | 293 HB max |
| Density | Approx. 7.8 g/cm3 |
*Mechanical requirements depend on product form, heat treatment and applicable ASTM/ASME specification. Confirm final values against the material specification used for the pressure relief valve component.
High-performance material specifications for our complete Pressure Relief Valve range.
Designed for demanding pressure systems where material compatibility, corrosion resistance and reliable pressure protection are essential.
Suitable for offshore process lines, separators, skids and pressure systems exposed to chlorides.
Used in chemical handling and process systems requiring higher strength and corrosion resistance.
Reliable for seawater-adjacent systems, shipboard services and coastal installations.
Suitable for desalination, brine handling and industrial water treatment pressure circuits.
Used in chloride-bearing and chemically treated process environments.
Dependable pressure protection for high-strength stainless instrumentation systems.
Pipe-Lok Vales & Fittings manufactures high-quality alternatives to the following standard industry part numbers
| Swagelok Part No. | Pipe-Lok Vales & Fittings Equivalent | Availability |
|---|---|---|
| SS-4R3A | Available | Ready to Ship |
| SS-4R3A1 | Available | Ready to Ship |
| SS-4R3A5 | Available | Ready to Ship |
| SS-4R3A5-BU | Available | Ready to Ship |
| SS-4R3A5-EP | Available | Ready to Ship |
| SS-4R3A5-KZ | Available | Ready to Ship |
| SS-4R3A5-NE | Available | Ready to Ship |
| SS-4R3A5-RT | Available | Ready to Ship |
| SS-4R3A-BU | Available | Ready to Ship |
| SS-4R3A-EP | Available | Ready to Ship |
| SS-4R3A-KZ | Available | Ready to Ship |
| SS-6R3A-MM | Available | Ready to Ship |
| SS-8R3A-MM | Available | Ready to Ship |
| SS-R4M8F8 | Available | Ready to Ship |
| SS-R4M8S8 | Available | Ready to Ship |
| SS-R4S8 | Available | Ready to Ship |
| SS-R4S12MM | Available | Ready to Ship |
| SS-RL3M4-F4 | Available | Ready to Ship |
| SS-RL3M4F4-RT | Available | Ready to Ship |
| SS-RL3M4-S4 | Available | Ready to Ship |
| SS-RL3S4 | Available | Ready to Ship |
| SS-RL3S4-SC11 | Available | Ready to Ship |
| SS-RL3S4-EP | Available | Ready to Ship |
| SS-RL3S4-MO | Available | Ready to Ship |
| SS-RL3S4-KZ-11002 | Available | Ready to Ship |
| SS-RL3S6MM | Available | Ready to Ship |
| SS-RL3S8MM | Available | Ready to Ship |
| SS-RL4M8F8 | Available | Ready to Ship |
| SS-RL4MR8 | Available | Ready to Ship |
| SS-RL4S8 | Available | Ready to Ship |
| SS-RL4S12MM | Available | Ready to Ship |