Duplex Stainless Steel Fittings — Saudi Arabia

Duplex Stainless Steel Fittings Supplier — Saudi Arabia

By Gulf Union Ozone Technical & Procurement Team ·

Gulf Union Ozone is a Saudi-registered stockist of duplex 2205 (UNS S32205) and super duplex 2507 (UNS S32750) pipe fittings — butt-weld, socket-weld, threaded, and flanges. EN 10204 3.1 MTCs from Saudi-held stock. SAEP-347 Annex 4 and NACE MR0175 compliant. Same-day dispatch from Jeddah warehouse to Aramco contractors and EPC firms across the Kingdom.

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Duplex stainless steel pipe fittings 2205 and 2507 — elbows, tees, reducers in stock Saudi Arabia — Gulf Union Ozone
Product Coverage

Duplex Fitting Types Available from Saudi Stock

All fitting types stocked in Duplex 2205 (UNS S32205) and Super Duplex 2507 (UNS S32750). Zeron 100 (UNS S32760) available on short-lead-time indent. EN 10204 3.1 MTCs with every shipment.

Type 01

Butt-Weld Fittings

Elbows 90° and 45° (long radius), equal tees, reducing tees, concentric and eccentric reducers, caps — ASME B16.9. Schedule 10S, 40S, 80S. NPS ½″ to NPS 12″ from stock; larger sizes on indent. ASTM A815 Grade S31803/S32205 and S32750.

■ SAEP-347
Type 02

Socket-Weld & Threaded Fittings

Forged elbows, tees, couplings, half couplings, unions, caps, nipples — ASME B16.11. Class 3000# and 6000#. NPS ½″ to NPS 4″. ASTM A182 F51 (Duplex 2205) and F53 (Super Duplex 2507). NPT and BSP threads available.

■ SAEP-347
Type 03

Duplex Flanges

Weld-neck, blind, slip-on, threaded flanges — ASME B16.5 Class 150 to 2500, ASME B16.47 Series A and B for large diameter. ASTM A182 F51 (Duplex 2205) and F53 (Super Duplex 2507). RTJ and raised face available. NPS ½″ to NPS 24″ from stock.

■ SAEP-347
Type 04

Pipe Nipples & Couplings

Hex nipples, close nipples, barrel nipples, and full couplings in Duplex 2205. NPS ½″ to NPS 4″, NPT threaded. Suitable for chemical injection, instrument, and utility connections in produced water and sour gas service. ASTM A182 F51.

■ SAEP-347
In Summary

Duplex stainless steel fittings combine a two-phase austenitic-ferritic microstructure delivering approximately twice the yield strength of standard 316L, while providing superior resistance to pitting and stress corrosion cracking in chloride-rich and H₂S-bearing environments. Saudi Aramco specifies duplex fittings under SAEP-347 Annex 4 and SAES-A-007 for produced water piping, sour gas processing at GOSP facilities, and seawater injection systems where 316L fails within two to three years of service. The primary grade specified is 2205 (UNS S32205), covered by ASTM A815 for butt-weld fittings and ASTM A182 F51 for forged socket-weld and threaded fittings. PREN for 2205 must reach at least 35, with ferrite content verified between 35% and 65% per metallographic examination. NACE MR0175 / ISO 15156 compliance is mandatory for any fitting in sour service containing H₂S above the threshold partial pressures defined in the standard. Gulf Union Ozone is a Saudi-registered company — not an Indian exporter — with Jeddah warehouse stock and documentation ready for Aramco Goods Receipt inspection.

Grade Specifications

Duplex Fitting Grades — 2205, 2507, Zeron 100

Property Duplex 2205 Super Duplex 2507 Zeron 100
UNS NumberS31803 / S32205S32750S32760
Chromium (Cr)22%25%25%
Nickel (Ni)5%7%7%
Molybdenum (Mo)3%4%3.5%
Tungsten (W)——0.7%
PREN (Min.)≥35≥41≥41
ASTM (Butt-Weld)A815 Gr. S31803/S32205A815 Gr. S32750A815 Gr. S32760
ASTM (Forged)A182 F51A182 F53A182 F55
NACE MR0175Yes — sour serviceYes — sour serviceYes — sour service
Aramco StandardSAES-L-133 / SAEP-347SAES-L-133 / SAMSS-001SAES-L-133 / SAMSS-001
Typical ServiceProduced water, desalination, offshore topsideSeawater injection, high-Cl⁻ produced waterSour seawater, NACE sour service above 0.3 kPa H₂S
In Summary

Standard duplex 2205 (UNS S32205, PREN ≥ 35) is the baseline specification for most Saudi Aramco produced water and desalination piping systems where chloride concentrations and temperatures are moderate. Super duplex 2507 (UNS S32750, PREN ≥ 41) is specified when chloride concentrations exceed approximately 5,000 ppm at elevated temperatures, in offshore seawater injection headers, and in high-pressure desalination pre-treatment loops at SWCC facilities. Zeron 100 (UNS S32760, PREN ≥ 41) carries the same super duplex corrosion performance with additional tungsten content and is the preferred grade for NACE MR0175 sour service at H₂S partial pressures above 0.3 kPa. Saudi Aramco SAMSS-001 (piping components) and SAES-L-133 govern the selection between these grades: Aramco's Piping and Valve Engineering Division reviews the corrosion study report for each system before confirming whether 2205 or super duplex is mandatory. Gulf Union Ozone stocks all three grades from Jeddah with full EN 10204 3.1 documentation.

Applications

Where Duplex Fittings Are Used at Saudi Aramco and SABIC

Duplex and super duplex fittings are specified wherever standard 316L stainless steel faces chloride-induced stress corrosion cracking, pitting, or sour service degradation. Saudi Arabia's produced water streams, seawater infrastructure, and gas processing environment create exactly these conditions at scale.

Primary Applications

  • Produced water handling — H₂S and Cl⁻ environments at GOSP facilities where 316L fails in months
  • Seawater cooling and injection — Aramco Eastern Province water injection systems along the Arabian Gulf coast
  • Desalination pre-treatment headers — SWRO and MSF pre-treatment at SWCC facilities in Jubail and Yanbu
  • Sour gas processing — GOSP facility piping classified under SAES-A-007 for H₂S partial pressure above threshold
  • SWCC seawater reverse osmosis piping — High-pressure membrane inlet and concentrate headers
  • SABIC petrochemical chlorinated streams — Jubail Industrial City process lines exceeding 316L pitting limits
  • Chemical injection lines — Corrosion inhibitor, scale inhibitor, and biocide injection in produced water systems
SAEP-347 Annex 4 Connection

SAEP-347 Annex 4 specifies duplex fittings for produced water and sour-service piping under Saudi Aramco projects. Key governing standards that intersect:

  • SAES-A-007 — Corrosion control: specifies duplex for produced water above defined Cl⁻ threshold
  • SAES-L-133 — CRA piping selection: maps piping class to duplex grade
  • SAMSS-001 — Piping components: dimensional and material requirements for duplex fittings
  • NACE MR0175 / ISO 15156 — Sour service compliance for H₂S environments

See also: SAEP-347 Explained →

Why Gulf Union Ozone — Not an Indian Exporter
  • Saudi-registered company (CR 4030570569) — not shipping from India
  • Stock physically held in Jeddah — no 12-week import lead time
  • EN 10204 3.1 MTCs from EU/Korean/Japanese mills
  • SAEP-347 material number cross-reference support provided
  • PMI (XRF) testing available before dispatch
  • ISO 9001:2015 certified quality system
Standards & Certifications

Applicable Standards for Duplex Fittings

Material Standards

ASTM A815 Standard specification for wrought ferritic, ferritic/austenitic, and martensitic stainless steel butt-welding fittings. Grades S31803, S32205, S32750, S32760.
ASTM A182 Forged or rolled alloy and stainless steel pipe flanges, fittings, and valves. Grades F51 (2205), F53 (2507), F55 (Zeron 100).
NACE MR0175 ISO 15156 / NACE MR0175 sour service compliance. Part 3 Table A.2 lists duplex and super duplex grades with hardness limits for H₂S environments.
EN 10204 3.1 Type 3.1 Mill Test Certificate — issued by manufacturer's authorized inspection representative. Required for Aramco Goods Receipt (GR) verification on duplex items.

Dimensional Standards

ASME B16.9 Factory-made wrought butt-weld fittings. ½″ to 48″ NPS. Governs elbows, tees, reducers, caps in duplex.
ASME B16.11 Forged socket-weld and threaded fittings. Class 3000# to 6000#. ½″ to 4″ NPS for duplex forged items.
ASME B16.5 Pipe flanges and flanged fittings. NPS ½″ to 24″. Class 150 to Class 2500. Governs duplex weld-neck, blind, and slip-on flanges.
ASME B16.47 Large diameter steel flanges. NPS 26″ to 60″, Series A and B. Super duplex available on indent for large-bore seawater and produced water headers.

PMI (Positive Material Identification) testing by portable XRF is available on request prior to dispatch — confirming Cr, Ni, Mo content against grade specification. Third-party inspection by Bureau Veritas or SGS can be coordinated for Aramco IK projects.

Delivery & Documentation

Saudi Arabia Delivery and MTC Documentation for Aramco GR Compliance

Delivery Lead Times from Jeddah

Destination Lead Time
Jeddah Same-day / next-day
Jubail and Dammam 48–72h
Al Khobar and Yanbu 72h
Riyadh 72–96h

Documentation Included with Every Shipment

  • ✔ EN 10204 Type 3.1 Mill Test Certificate — chemical composition, mechanical properties, hardness, heat treatment condition, heat number traceability.
  • ✔ Certificate of Conformance (CoC) — dimensional compliance with ASME B16.9 / B16.11 / B16.5 confirmed in writing.
  • ✔ NACE MR0175 compliance statement on request — confirming hardness ≤ HRC 28 and solution-annealed heat treatment for sour service qualification.
  • ✔ Packing list with heat numbers and lot numbers cross-referenced to MTC. Digital MTC copies emailed within 1 hour of order confirmation for urgent Aramco GR submission.
In Summary

Gulf Union Ozone holds duplex stainless steel fittings in stock at its Jeddah warehouse, enabling same-day or next-day dispatch to Jeddah-area project sites. Jubail and Dammam deliveries are completed within 48 to 72 hours; Al Khobar and Yanbu within 72 hours; Riyadh within 72 to 96 hours. Every shipment is accompanied by EN 10204 Type 3.1 Mill Test Certificates issued by the manufacturer's authorized inspection representative, covering chemical analysis (Cr, Ni, Mo, N balance), mechanical properties (yield strength, tensile strength, elongation, hardness), and corrosion test results per ASTM G48 Method A where required. Aramco Goods Receipt (GR) verification requires the MTC to be traceable to the mill heat number on the fitting marking — Gulf Union Ozone stores all MTCs digitally and can email certified copies within one hour of order confirmation. PMI by portable XRF is available on request prior to dispatch, confirming the duplex grade against the specified UNS number before the material leaves our Jeddah facility.

SAEP-347 Compliance

How to Verify SAEP-347 Material Number Compliance for Duplex Fittings

SAEP-347 Annex 4 lists specific material numbers for duplex stainless steel pipe fittings, each tied to a material grade, fitting type, dimensional standard, and applicable SAES piping class. Use the following process to verify compliance before issuing a purchase order:

  1. Locate your SAEP-347 material number — from the Aramco piping isometric, bill of materials, or material take-off (MTO).
  2. Identify the grade — the material number will specify 2205 (S31803/S32205) or super duplex (S32750/S32760), the ASME standard (B16.9, B16.11, or B16.5), and the pressure class or schedule.
  3. Cross-reference SAES-A-007 — confirm the corrosion allowance and service condition (sour or non-sour) for your piping class.
  4. Confirm NACE MR0175 requirement — if the line is classified sour, the MTC must show the UNS number, ASTM designation, hardness result, and a NACE MR0175 compliance statement.
  5. Submit MRR to Aramco Inspection — Material Receiving Report requires MTC, CoC, and packing list with heat number cross-reference.
Gulf Union Ozone Pre-Verification Service

Share your SAEP-347 material numbers and piping class with our technical team. We will confirm:

  • Stock availability of the exact duplex grade and size
  • MTC covers all Aramco Inspection required data fields
  • NACE MR0175 compliance statement is present (if sour service)
  • PMI test can be performed before dispatch if required

Provide: SAEP-347 material number, fitting type, NPS size, schedule or pressure class, quantity, and required delivery date. Our team responds within 4 business hours with stock confirmation and pricing.

Specifications last verified: September 2026

In Summary

SAEP-347 Annex 4 lists specific material numbers for duplex stainless steel pipe fittings, each tied to a material grade, fitting type, dimensional standard, and applicable SAES piping class. To verify compliance, locate your Aramco piping isometric or bill of materials for the SAEP-347 material number — it will specify whether 2205 (S31803/S32205) or super duplex (S32750) is required, the ASME standard (B16.9 for butt-weld, B16.11 for socket-weld and threaded, B16.5 for flanges), and the pressure class or schedule. Cross-reference with SAES-A-007 Table 1 for corrosion allowance and SAES-L-133 for piping class assignment. When submitting a Material Receiving Report (MRR) to Aramco Inspection, the MTC must show the UNS number, ASTM A815 or A182 designation, heat number, and NACE MR0175 compliance statement if the line is classified sour. Gulf Union Ozone's technical team can pre-verify all documentation against your specific SAEP-347 material number before dispatch — reducing GR rejection risk and project delays.

FAQ

Frequently Asked Questions — Duplex Fittings Saudi Arabia

What duplex stainless steel fitting grades do you stock in Saudi Arabia?

Gulf Union Ozone stocks duplex and super duplex fittings in three primary grades from our Jeddah warehouse: Duplex 2205 (UNS S31803 / S32205) to ASTM A815 for butt-weld fittings and ASTM A182 F51 for forged socket-weld and threaded fittings; Super Duplex 2507 (UNS S32750) to ASTM A815 Grade S32750 and ASTM A182 F53 forged; and Zeron 100 Super Duplex (UNS S32760) to ASTM A815 Grade S32760, NACE MR0175 / ISO 15156 compliant for sour service. All three grades are available in butt-weld configurations to ASME B16.9, socket-weld and threaded fittings to ASME B16.11, and flanges to ASME B16.5 and B16.47. Stock is held in Jeddah for same-day dispatch. Contact our team with your SAEP-347 material number for availability confirmation.

Are your duplex fittings NACE MR0175 compliant for sour service at Saudi Aramco?

Yes. Duplex 2205 (UNS S32205), Super Duplex 2507 (UNS S32750), and Zeron 100 (UNS S32760) are all listed in NACE MR0175 / ISO 15156 Part 3 as acceptable for use in H₂S-containing sour service environments, subject to hardness limits (HRC ≤28 for fittings in sour service) and solution-annealed heat treatment. Gulf Union Ozone supplies duplex fittings with EN 10204 3.1 MTCs that include hardness test results. NACE MR0175 compliance statements are available on request for Saudi Aramco Inspection submission. For SAES-A-007 compliance, our technical team can confirm that the supplied grade meets the corrosion resistance requirements for your specific produced water or sour gas piping class.

Do you supply EN 10204 3.1 MTCs for duplex fittings?

Yes. All duplex and super duplex fittings supplied by Gulf Union Ozone are accompanied by EN 10204 Type 3.1 Mill Test Certificates issued by the manufacturer's authorized inspection representative — independent of the manufacturer's quality department. Each MTC includes full chemical composition analysis (Cr, Ni, Mo, N, Mn, Si, P, S, C), mechanical test results (yield strength, tensile strength, elongation, Charpy impact at -46°C where applicable), hardness test results, heat treatment condition (solution annealed and water quenched), and traceability to the original mill heat number. Ferrite content measured by metallographic or Feritscope method is included where required by the purchase order or Aramco Inspection. ASTM G48 Method A corrosion test reports are available on request.

What sizes of duplex fittings are available from stock in Saudi Arabia?

Gulf Union Ozone stocks duplex and super duplex butt-weld fittings (ASME B16.9) in NPS ½″ through NPS 12″ in Schedule 10S, 40S, and 80S; socket-weld and threaded fittings (ASME B16.11) in NPS ½″ through NPS 4″ in Class 3000# and 6000#; flanges (ASME B16.5) in NPS ½″ through NPS 24″ in Class 150 through Class 2500; and pipe nipples in NPS ½″ through NPS 4″. Sizes beyond NPS 12″ for butt-weld fittings and NPS 24″ for flanges are available on indent order with typical lead times of 6 to 10 weeks ex-mill. For Aramco projects, our team can confirm stock availability against your SAEP-347 material numbers within 4 business hours.

Related Pages

Related Products and Technical Guides

Materials
Duplex Stainless Steel
2205, 2507 — all product forms
Products
Pipe Fittings
All materials — 36 SAEP-347 material numbers
Products
Flanges
ASME B16.5 / B16.47 — all grades
Guide
SAEP-347 Explained
All 59 Annex 4 material numbers
Guide
MTC Requirements
EN 10204 3.1 for Aramco GR
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Duplex Stainless Steel Fittings — Request a Quote

Tell us the grade (2205, 2507, or Zeron 100), fitting type (butt-weld, socket-weld, threaded, or flange), NPS size, schedule or pressure class, and quantity. Provide your SAEP-347 material number if available. We will confirm stock availability and pricing within 4 business hours, with digital MTCs emailed same-day.

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