| Customization: | Available |
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| Standard: | ANSI |
| Material: | Stainless Steel |
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NAI LOK Super Duplex Stainless Steel 2205 2507 Hex Nipple Male Tee Male NPT BSPP BSPT High Pressure 10000psi Instrument Thread Pipe Fitting Reducing Adapter Tee
NAI LOK Premium 2.5 Mo Molybdenum nickel fitting Stainless Steel Superior Corrosion Resistance Hex Reducing Adapter Instrument Pipe Fitting
Material Standards: UNS S32205 / S31803 (2205) | UNS S32750 (2507). Compliant with ASTM A182 for forged fittings.
Thread Standards: NPT, BSPP, BSPT available as standard. Other threads can be customized.
Pressure Rating: Pressure class ratings (e.g., 3000#, 6000# , 10000#) vary by size and material grade. Please consult our engineering datasheets for specific values.
Heat Treatment: All fittings are supplied in the solution-annealed and quenched condition (per ASTM A182) to ensure optimal phase balance and corrosion resistance
Inspection & Certification: Supplied with full Material Test Reports (MTRs) tracing to the original melt. Compliant with, ASTM, ASME, and other international standards.
These male tee are forged from duplex stainless steels, which feature a unique microstructure consisting of roughly equal parts austenite and ferrite phases
. This dual-phase structure synergistically combines the best properties of both: the high strength and stress corrosion cracking resistance of ferritic steels with the toughness and weldability of austenitic steels
The chemical composition is precisely controlled to optimize performance. Key alloying elements include Chromium (Cr) for passive oxide layer formation, Molybdenum (Mo) and Nitrogen (N) for enhanced pitting and crevice corrosion resistance
| Property / Grade | 2205 Duplex (UNS S32205/S31803) | 2507 Super Duplex (UNS S32750) | Advantage of 2507 |
|---|---|---|---|
| Typical Composition | 22.5% Cr, 5.7% Ni, 3.0% Mo, 0.15% N | 25% Cr, 7% Ni, 4% Mo, 0.27% N | Higher alloy content |
| Pitting Resistance Equivalent (PRE) | 32-39 | > 40 | Superior localized corrosion resistance |
| Yield Strength (min.) | 450 MPa | 550 MPa | 22% higher strength |
| Tensile Strength (min.) | 620 MPa | 800 MPa | 29% higher strength |
| Key Corrosion Resistance | Excellent resistance to stress corrosion cracking, pitting, and crevice corrosion | Exceptional resistance to chlorides, acids (e.g., sulfuric, acetic), and seawater | Extended service life in harsher media. |
| Primary Benefit | Cost-effective performance upgrade over 316L, with double the yield strength | Ultimate solution for aggressive environments, replacing more expensive nickel alloys | Maximum durability and ROI. |
| Material Grade | UNS Number (®) | Key Characteristics & Typical Applications |
|---|---|---|
| Inconel® 625 | UNS N06625 | Excellent fatigue and thermal fatigue strength. Resists a wide range of severe corrosives. Ideal for seawater, aerospace, and chemical processing. |
| Monel® 400 | UNS N04400 | Superior resistance to seawater and steam at high temperatures. Excellent for marine and hydrocarbon applications. |
| Hastelloy® C22 | UNS N06022 | Outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. Handles oxidizing and reducing media. |
| Hastelloy® C276 | UNS N10276 | Versatile corrosion resistance to a broad range of chemical process contaminants, including chlorides. |
| Hastelloy® B2 | UNS N10665 | Excellent resistance to reducing environments, especially hydrochloric acid at all concentrations and temperatures. |
| Hastelloy® B3 | UNS N10675 | Improved thermal stability and corrosion resistance over B2, with excellent resistance to hydrochloric acid. |
| Alloy 254 SMO® 6Mo 6Moly | UNS S31254 | Extremely high resistance to pitting and crevice corrosion, ideal for seawater and chloride-containing solutions. |
| Super Duplex® 2507 | UNS S32750 | High strength and excellent resistance to stress corrosion cracking, pitting, and crevice corrosion. |
| Duplex® 2205 | UNS S31803/S32205 | Good strength and improved resistance to stress corrosion cracking compared to standard stainless steels. |
| Alloy 904L | UNS N08904 | High chromium, nickel, molybdenum content provides excellent resistance to sulfuric acid and other aggressive chemicals. |
These fittings are engineered for sectors where reliability, safety, and longevity under stress and corrosion are paramount.
Oil, Gas & Offshore Engineering: Ideal for seawater cooling systems, firewater lines, chemical injection skids, topside piping, and subsea equipment on platforms and FPSOs
. Their resistance to chloride-induced SCC is critical
Chemical & Petrochemical Processing: Specified for piping handling sulfuric and organic acids, chloride-bearing process streams, and heat exchangers
2507 is particularly effective in diluted sulfuric acid environments
Marine & Desalination: The premier choice for high-salinity environments in seawater reverse osmosis (SWRO) high-pressure piping, ballast systems, and offshore platform piping.
Pulp & Paper Industry: Resists corrosion in aggressive digesters and bleaching equipment where chlorides and various acids are present
High-Strength Mechanical & Structural Components: Suitable not just for fluid conveyance but also as high-integrity structural connectors in corrosive atmospheres where their strength-to-weight ratio is advantageous
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