Which stainless steel pipe grades does Saudi Aramco specify under SAES-L-140?
Saudi Aramco Engineering Standard SAES-L-140 (Stainless Steel Piping) governs material selection for stainless piping throughout Aramco facilities. Under SAES-L-140, TP304L (UNS S30403) is specified for utility water, demineralized water, and low-temperature service below 400°C where chloride exposure is low. TP316L (UNS S31603) is specified for process service, hydrocarbon condensate lines, and cooling water headers in coastal or chloride-bearing environments. TP321 (UNS S32100) is required for high-temperature service above 400°C where sensitization resistance is needed. TP347 (UNS S34700) is specified for creep service in reformer headers. For produced-water and sour-gas environments, duplex 2205 (ASTM A790 S31803) is referenced per SAES-A-007. Super duplex 2507 (S32750) is specified for offshore seawater injection and high-chloride riser service. All grades must satisfy SAMSS-001 procurement requirements and be traceable to EN 10204 3.1 mill test certificates.
Is EN 10204 3.1 mill test certificate mandatory for stainless steel pipe at Saudi Aramco?
Yes. EN 10204 Type 3.1 mill test certificates are mandatory for stainless steel pipe supplied to Saudi Aramco projects. The 3.1 MTC is issued by the manufacturer's authorised inspection representative, independent of production, and certifies the actual chemical composition and mechanical properties of the specific heat and batch. For Aramco Goods Receipt (GR) on stainless pipe, the 3.1 MTC must include the heat number, cast analysis (C, Si, Mn, P, S, Cr, Ni, Mo, Ti or Nb where applicable), mechanical test results (tensile, yield, elongation), and heat treatment condition. In addition to the 3.1 MTC, Saudi Aramco General Instruction GI-0002.100 requires Positive Material Identification (PMI) via XRF for all austenitic and duplex stainless steel pipe. Gulf Union Ozone supplies both the EN 10204 3.1 MTC and a full PMI (XRF) test certificate with every stainless pipe order for Aramco projects, ensuring GR acceptance without documentation queries.
What is the difference between duplex 2205 and super duplex 2507 for Saudi Aramco service?
Duplex 2205 (UNS S31803 / S32205, ASTM A790) and super duplex 2507 (UNS S32750, ASTM A790) are both ferritic-austenitic stainless steel alloys with superior strength and corrosion resistance compared to austenitic 316L. The key difference is alloy content and the resulting Pitting Resistance Equivalent Number (PREN). Duplex 2205 has a PREN of approximately 35, making it suitable for produced-water headers, sour-gas service at GOSPs, and moderately aggressive seawater cooling. Super duplex 2507 has a PREN above 42, giving it outstanding resistance to chloride stress corrosion cracking and pitting in hot seawater — the reason it is specified by Saudi Aramco for offshore seawater injection risers, SWCC multi-stage flash (MSF) plant brine headers, and high-pressure injection well headers. Both grades require NACE MR0175 / ISO 15156 compliance documentation for Aramco sour service, and PMI verification per GI-0002.100. Gulf Union Ozone stocks duplex 2205 and can source super duplex 2507 with full Aramco-compliant documentation.
Do you supply stainless steel pipes to SAEP-347 Annex 4 material numbers?
Yes. Gulf Union Ozone is an active supplier aligned to Saudi Aramco Engineering Procedure SAEP-347 Annex 4, which lists the approved material numbers for stainless steel piping components. SAEP-347 Annex 4 covers ASTM A312 TP304L, TP316L, TP321, and TP347 seamless pipe material numbers, as well as ASTM A790 duplex S31803 and S32750. When submitting quotes for Aramco projects, we reference the specific SAEP-347 material number in our documentation package to streamline the Goods Receipt process. Each delivery includes the EN 10204 3.1 MTC, PMI (XRF) test certificate, dimensional inspection per ASME B36.19, NACE MR0175 compliance certificate for duplex grades in sour service, and heat and batch number traceability — the complete documentation set required for Aramco GR acceptance on stainless piping. Contact us with your SAEP-347 material number, quantity, and schedule for a same-day quotation.
