Pipe fittings, flanges, and pipes in Duplex 2205 (UNS S31803) and Super Duplex 2507 (UNS S32750) from Jeddah warehouse. NACE MR0175 compliant. Full MTCs and mill certificates with every order. Aramco SAES-L-133 relevant grades stocked.
| Property | Duplex 2205 | Super Duplex 2507 |
|---|---|---|
| UNS Number | S31803 / S32205 | S32750 |
| Common Name | Duplex 2205 | Super Duplex 2507 |
| Chromium (Cr) | 21–23% | 24–26% |
| Nickel (Ni) | 4.5–6.5% | 6–8% |
| Molybdenum (Mo) | 2.5–3.5% | 3.0–5.0% |
| PREN (Min.) | ≥35 | ≥41 |
| Yield Strength (Min.) | 450 MPa (65 ksi) | 550 MPa (80 ksi) |
| Tensile Strength (Min.) | 620 MPa (90 ksi) | 800 MPa (116 ksi) |
| Max. Service Temp. | 250°C (482°F) | 250°C (482°F) |
| NACE MR0175 | Yes (sour service) | Yes (sour service) |
| Key Application | Chemical process, offshore, seawater | Seawater injection, produced water, high-chloride |
| Applicable ASTM | A182 F51, A240, A790 | A182 F53, A240, A790 |
| Aramco Standard | SAES-L-133 | SAES-L-133 |
Duplex stainless steels combine a two-phase microstructure — roughly 50% austenite and 50% ferrite — delivering yield strength around 480 MPa, approximately double that of 316L at 170 MPa. The standard grade, 2205 (UNS S32205), is the workhorse for seawater injection, desalination, and offshore topside piping in Saudi Arabia. Gulf Union Ozone stocks ASTM grades A182 F51 forged fittings and flanges, A890 4A castings for valve bodies, A928 seamless and welded pipe, and A789/A790 tubular products. Pitting Resistance Equivalent (PREN) for 2205 is 34 to 36; NACE MR0175/ISO 15156 Part 3 Table A.2 lists it as acceptable for sour service with hardness limits. Welding requires interpass temperature below 150°C; post-weld heat treatment is not required for standard duplex; filler metal is typically ER2209. Saudi Aramco SAES-L-133 and SAES-L-108 govern duplex selection. Documentation includes EN 10204 3.1 MTCs with chemical analysis of chromium, nickel, molybdenum, and nitrogen balance critical; corrosion test reports per ASTM G48 Method A available on request.
Elbows (45° & 90°), equal tees, reducing tees, reducers (concentric & eccentric), caps. ASME B16.9. Available in Schedule 10S to Schedule 80S.
Weld neck, slip-on, socket weld, blind, and lap joint flanges. ASME B16.5 Class 150 through Class 2500. ASME B16.47 large diameter available.
Seamless and welded pipe in NPS ½" to NPS 12" standard sizes. ASTM A790 / A928. Available in annealed and pickled condition.
Ball valves, gate valves, globe valves in duplex and super duplex body material for sour service and high-chloride applications.
Threaded elbows, tees, couplings, nipples in duplex 2205. NPT and BSP threads. ASME B16.11 socket weld fittings also available.
Round bar (ASTM A276 S31803/S32750), plate and sheet (ASTM A240) for fabrication. Mill-cut to specification on request.
Saudi Arabia's industrial environment — characterized by high ambient temperatures, seawater exposure along the Gulf and Red Sea coasts, and H2S-containing hydrocarbon streams — creates demanding conditions for standard stainless steels. Duplex and super duplex grades solve specific corrosion problems that standard 316L stainless cannot handle reliably.
SAES-L-133 (Corrosion-Resistant Alloy Piping) governs the selection and application of duplex stainless steel in Saudi Aramco facilities. Key requirements include:
Duplex stainless steel for Saudi Aramco seawater injection systems must satisfy SAES-A-007 (corrosion control — specifies 22% Cr duplex for seawater service above 50°C) and NACE MR0175 / ISO 15156 for sour-service produced-water piping. Gulf Union Ozone supplies duplex 2205 (UNS S31803) and super duplex 2507 (UNS S32750) pipe, fittings, flanges, and valves with PREN (Pitting Resistance Equivalent Number) certification — PREN 35+ for 2205 and PREN 42+ for 2507 — confirming resistance to pitting corrosion in the chloride concentrations and temperatures encountered at Saudi Arabian coastal and offshore production facilities. Duplex material hardness testing (maximum HV310 per NACE MR0175) and ferrite content measurement (40–60% ferrite for balanced microstructure) are documented on EN 10204 3.1 mill test certificates supplied with every duplex delivery.
Tell us the grade (2205 or 2507), product form (fittings, flanges, pipe), size, schedule/rating, and quantity. We will confirm stock availability and pricing within 4 business hours.
Gulf Union Ozone duplex stainless steel supply delivers to all Saudi industrial zones from the Jeddah distribution centre: duplex 2205 pipe, bar, and fittings in standard NPS sizes are held in bonded stock for 48–72 hours delivery to Jubail and Dammam, 72 hours to Yanbu and Al Khobar, and 72–96 hours to Riyadh. Super duplex 2507 and Zeron 100 material is sourced with 4–8 weeks lead time from approved Swedish and European mills. Every duplex delivery includes: EN 10204 3.1 mill test certificate (chemical composition, mechanical properties, ferrite content, corrosion test per ASTM A923); NACE MR0175 compliance statement; positive material identification (PMI) XRF certificate where required by Saudi Aramco GI-0002.100; and heat traceability records. Third-party inspection at the mill by TÜV Rheinland or Bureau Veritas is available for Saudi Aramco mandatory TPI requirements.
Duplex stainless steel pipeline systems for NEOM Sindalah Island and Red Sea Project coastal resort infrastructure are specified for seawater cooling, brine discharge, and desalination distribution networks where conventional carbon steel piping would corrode in the aggressive coastal chloride environment. Gulf Union Ozone is positioned to supply duplex 2205 pipe, fittings, flanges, and valves for NEOM EPC contractors currently in procurement — offering Saudi-registered local supply with 9COM Aramco vendor number, IKTVA local content documentation, and EN 10204 3.1 traceability required by NEOM's tier-1 EPC quality requirements. Super duplex 2507 for high-chloride brine discharge piping at NEOM Oxagon industrial port desalination, where seawater concentration can reach 70,000 ppm TDS. Zeron 100 (UNS S32760) for crevice-corrosion-resistant flange gaskets and valve seats in concentrated brine service. Gulf Union Ozone supports NEOM EPC material requisitions from Jeddah, with HQ proximity enabling same-day collection and technical support calls.