Saudi Aramco Compliance
Published: 28 August 2026 · Updated: 30 August 2026 · Gulf Union Ozone — Technical Editorial Team

What Is SAEP-347? Saudi Aramco's Procedure for Material Stockists, Explained

SAEP-347 is Saudi Aramco's Engineering Procedure that governs how stockist suppliers may supply valves, pipe fittings, flanges, and metallic piping for Aramco projects. Annex 4 lists 59 specific material numbers approved for stockist supply. Gulf Union Ozone stocks all 59.

By Gulf Union Ozone Technical & Procurement Team ·
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SAEP-347 material numbers — valves, pipe fittings and flanges for Saudi Aramco projects
Definition

What Is SAEP-347?

SAEP-347 stands for Saudi Aramco Engineering Procedure 347 — Supplying Material from Stockists. It is an internal procurement governance document issued by Saudi Aramco that defines the rules under which a stockist (a company that holds materials in inventory, as opposed to a manufacturer producing to order) may supply certain critical piping materials to Saudi Aramco projects.

The procedure exists because Saudi Aramco needs assurance that materials purchased from stockists — who did not manufacture the product — still meet Aramco's quality, traceability, and documentation standards. Without a governing procedure, there would be no consistent way to verify that a fitting held in a distributor's warehouse for months or years still has full, unbroken traceability back to its originating mill heat.

SAEP-347 fills this gap by specifying: which materials may be sourced from stockists, what documentation is mandatory, what physical marking requirements apply, and how storage conditions must be maintained.

In Summary

SAEP-347 — Saudi Aramco Engineering Procedure 347, Supplying Material from Stockists — is the internal procurement governance document that defines how stockist suppliers may supply critical piping materials to Saudi Aramco capital projects, plant maintenance programmes, and Turnaround (TA) shutdown events. The procedure was introduced to eliminate two persistent supply chain failure modes: counterfeit parts entering the system under false documentation, and material substitution where a lower-grade material is shipped in place of the specified grade. SAEP-347 applies whenever materials pass through a distributor's warehouse before reaching an Aramco facility. It does not apply to manufacturer-direct supply. The procedure establishes 59 stockable material numbers across valves, pipe fittings, flanges, and metallic pipe. Every compliant stockist must hold Approved Vendors List placement under Annex 5, supply EN 10204 3.1 mill test certificates with heat-number traceability, and maintain an ISO 9001:2015 quality management system. The procedure applies across all Saudi Aramco facilities including Abqaiq, Ras Tanura, Yanbu, and Jazan.

Key Fact

SAEP-347 applies specifically to stockist supply — it does not apply when materials are purchased direct from the original manufacturer. If a contractor buys pipe directly from a Saudi mill, SAEP-347 is not invoked. If that same pipe sits in a stockist's warehouse and is then purchased by a contractor, SAEP-347 governs the transaction.

Procedure reference: Gulf Union Ozone monitors Saudi Aramco engineering bulletin updates for SAEP-347 revisions. Last procedure review: September 2026.

59
Material Numbers
4
Annex Sections
ISO
9001:2015 Required
Scope

What Materials Does SAEP-347 Cover?

SAEP-347 covers four categories of critical piping and mechanical materials used in Aramco process and utility facilities:

🔩
Valves

Ball, gate, globe, check, butterfly, and plug valves. 23 specific material numbers in Annex 4.

⚙️
Pipe Fittings

Elbows, tees, reducers, caps, and branch fittings to ASME B16.9 and 02-SAMSS-005. 13 material numbers.

🔗
Flanges

Weld neck, slip-on, socket weld, blind, and spectacle plate flanges to ASME B16.5. 11 material numbers.

🛢️
Metallic Pipes

API 5L carbon steel pipes, ASTM A106 seamless pipes, alloy steel and stainless steel pipes. 12 material numbers.

Note: SAEP-347 does not cover all materials a contractor may purchase for an Aramco project — only those materials in the categories above when sourced from stockist suppliers. Electrical components, instruments, structural steel, and rotating equipment are outside the procedure's scope.

In Summary

SAEP-347 covers 59 material numbers across four product categories. Valves: 23 numbers covering ball, gate, globe, check, butterfly, and plug configurations. Pipe fittings: 18 numbers covering butt-weld elbows, tees, reducers, and caps, plus socket-weld and threaded fittings. Flanges: 12 numbers covering weld neck, slip-on, socket weld, blind, and threaded face types. Metallic pipe: 6 numbers in carbon steel and stainless steel grades. Each of the 59 material numbers uses a nine-digit Aramco format (prefix 6000) and maps to a specific material grade, size range, pressure class, and dimensional standard — for example, ASTM A216 WCB for carbon steel valves or ASTM A105N for carbon steel flanges to ASME B16.5. Collectively the 59 numbers cover approximately 80 to 90 percent of the piping components used in a typical Aramco process plant bill of materials. A stockist must carry all 59 numbers to be considered fully compliant with SAEP-347 — partial stocking does not satisfy the procedure's approved vendor requirements.

Key ASTM Material Grades Covered by SAEP-347
Grade Product Form Tensile (MPa) Yield (MPa) Carbon % max Temp. Range SAMSS Typical Use
ASTM A105N Forgings (flanges, fittings) 485 min 250 min 0.35 −29 °C to 427 °C SAMSS-001 ASME B16.5 flanges, SW fittings up to Class 2500
ASTM A106 Gr. B Seamless carbon steel pipe 415 min 240 min 0.30 −29 °C to 538 °C SAMSS-003 High-temp / high-pressure process piping
ASTM A234 WPB Wrought butt-weld fittings 415 min 240 min 0.30 −29 °C to 538 °C SAMSS-024 Elbows, tees, reducers to ASME B16.9
ASTM A216 WCB Cast carbon steel (valve bodies) 485 min 250 min 0.30 −29 °C to 538 °C SAMSS-001 Gate, globe, check valve bodies; SAEP-347 primary valve grade
ASTM A182 F316L SS 316L forgings 485 min 170 min 0.03 −196 °C to 425 °C SAMSS-023 Corrosion-service flanges and fittings

Sources: ASTM International; ASME B31.3; SAMSS-001. Verify against current mill MTCs for each heat.

Annex 4

SAEP-347 Annex 4: The Stockable 9COMS List

Annex 4 of SAEP-347 is the operative list — formally called the List of Stockable 9COMS (9COMS being Aramco's internal commodity management system prefix). It contains 59 discrete Aramco material numbers, each precisely defined with its applicable SAMSS (Saudi Aramco Material System Specification) reference, size range, pressure class, body material, and end connection type.

A material number in Annex 4 takes the form 6000XXXXXX — a nine-digit Aramco catalog number that uniquely identifies both the product type and its technical specification. When a contractor issues a Purchase Order referencing one of these numbers, they are specifying that the material must meet every attribute in that number's definition.

Gulf Union Ozone has mapped its inventory against all 59 numbers and maintains stock of products meeting the applicable technical requirements, with full documentation ready to ship.

Annex 4 Material Categories

Category Numbers Key Standards
Ball Valves404-SAMSS-035, 04-SAMSS-048
Gate Valves4API 602, 04-SAMSS-035, AWWA
Globe Valves3API 602, ASME 16.34
Check Valves804-SAMSS-035, API 594
Butterfly/Plug404-SAMSS-035
Flanges11ASME B16.5, 02-SAMSS-011
BW Fittings13ASME B16.9, 02-SAMSS-005
Metallic Pipes12API 5L, ASTM A106
View All 59 Material Numbers
In Summary

Annex 4 of SAEP-347 is the operative stockable materials list — 59 nine-digit Aramco material numbers (format 6000XXXXXX) presented in a table where each row states the material number, commodity description, applicable SAMSS or ASTM reference standard, permitted pressure class, and size range. Procurement officers use these numbers directly when raising material requisitions in Aramco's Maximo system; the Annex 4 number becomes the line item on the purchase order, which the stockist must match exactly in grade, size, and rating. Annex 4 items collectively account for approximately 80 to 90 percent of the piping component bill of materials on a typical Aramco capital project or plant maintenance programme. Annex 5 of the same procedure carries the Approved Vendors List — the roster of stockists who have passed Saudi Aramco's qualification audit and may legally supply Annex 4 materials. This list is updated periodically by Saudi Aramco's Materials Supply organisation. A stockist not on Annex 5 cannot supply SAEP-347 materials regardless of stock availability.

Why It Exists

Why Does Saudi Aramco Mandate SAEP-347?

Saudi Aramco operates some of the world's largest and most critical hydrocarbon infrastructure. A fitting failure in a high-pressure pipeline or refinery process loop carries catastrophic risk — HSE consequences, production loss, and asset damage measured in tens of millions of dollars. SAEP-347 exists to prevent three specific failure modes in the supply chain:

1. Material Substitution

Without MTC requirements, a stockist could unknowingly (or knowingly) supply a lower-grade material that physically resembles the specified grade. A carbon steel fitting masquerading as alloy steel will fail prematurely under Aramco operating conditions. SAEP-347's documentation chain makes substitution verifiable and reversible.

2. Traceability Loss

Materials handled by multiple parties risk losing their paper trail. Once an MTC is separated from its material, the supply chain can no longer confirm what it actually has. SAEP-347 requires that heat and lot numbers remain physically marked on the material and that documentation is preserved throughout the chain of custody.

3. Unapproved Material Grades

Aramco specifications (SAES, SAMSS) prescribe specific alloy grades and manufacturing standards for each service condition. SAEP-347 ties the stockable material numbers to specific SAMSS references, ensuring that even stockist-supplied materials meet the same grade requirements as manufacturer-direct supply.

The procedure is not a unique Aramco restriction — similar requirements exist under ADNOC (UAE), QatarEnergy, and Kuwait Oil Company procurement frameworks. Saudi Aramco's implementation via SAEP-347 is simply its own codification of internationally recognised supply chain quality principles applied to critical piping materials.

GCC NOC Stockist Compliance: How SAEP-347 Compares
Aspect Saudi Aramco (SAEP-347) ADNOC (UAE) QatarEnergy Kuwait Oil Co.
Governing document SAEP-347 ADNOC Spec / AGES category qualifications QE commodity-specific AVL specs KOC Standard FS.003 (Materials)
Stockable items list 59 material numbers (Annex 4) Category-level AVL qualifications Commodity AVLs by project spec Approved Vendor List by commodity
MTC type required EN 10204 3.1 mandatory EN 10204 3.1 (3.2 for critical items) EN 10204 3.1 minimum EN 10204 3.1 standard
Vendor qualification SAEP-347 Annex 5 AVL audit ADNOC supplier registration + audit QE supplier pre-qualification KOC approved supplier registration
Physical marking Heat + lot number on every item Heat traceability per ASTM/API std Heat number traceability required Marking per KOC purchase spec

Key differentiator: SAEP-347 is the only GCC NOC procedure that defines a fixed list of 59 stockable material numbers in Annex 4 — making vendor inventory verification straightforward for procurement engineers.

In Summary

Saudi Aramco mandates SAEP-347 to prevent three specific supply chain failure modes that carry real consequences in pressure service. First, material substitution: a lower-grade material physically resembling the specified grade is shipped, potentially reaching a high-pressure system where it will fail prematurely. SAEP-347 prevents this by restricting supply to Approved Vendors List stockists who are audited for grade control. Second, MTC fraud: falsified or photocopied mill test certificates are submitted in place of originals. SAEP-347 prevents this by requiring EN 10204 3.1 certificates — inspector-signed originals issued by the producing mill — and prohibiting Type 2.2 declarations. Third, heat-number breaks: traceability between the physical product and its certificate is lost during handling. SAEP-347 requires heat and lot numbers to be physically marked on every item and matched to documentation at the point of dispatch. Consequences of non-compliance are immediate: any shipment with incomplete or incorrect documentation is rejected at Saudi Aramco's Goods Receipt inspection. For materials received during a Turnaround, rejection means plant downtime and schedule overrun.

Documentation

What Documentation Must a SAEP-347 Stockist Provide?

Every shipment of SAEP-347 materials must be accompanied by the following documentation package. Missing any one of these documents is grounds for Aramco inspection rejection:

  1. 1
    Material Test Certificates (MTCs)
    Chemical composition and mechanical properties test results from the original mill. Must reference the specific heat number and meet the requirements of the applicable ASTM or API standard cited in the SAMSS.
  2. 2
    Certificate of Conformance (CoC)
    A signed declaration from the stockist confirming that the materials supplied conform to the specified Aramco material number requirements and applicable SAMSS standards.
  3. 3
    Mill Certificates with Heat/Lot Numbers
    Original manufacturer's mill certificate, which is distinct from the MTC. The mill certificate confirms the material's origin; the heat number links it to the MTC's test data.
  4. 4
    Physical Markings
    Heat number, size, schedule/rating, material grade, and manufacturer's mark must be legibly stamped or stencilled on the material itself. Markings must survive handling and storage.
  5. 5
    Third-Party Inspection Reports (where required)
    For certain high-risk material categories or where specified by the Purchase Order, independent inspection by a SASO-approved third-party inspector is required prior to shipment.
Gulf Union Ozone Documentation Pack

Every SAEP-347 order shipped from our Jeddah warehouse includes the complete documentation pack. We maintain a document archive linked to each shipment by purchase order, heat number, and invoice reference for up to 10 years.

  • Mill MTCs with chemical & mechanical data
  • Gulf Union Ozone Certificate of Conformance
  • Original manufacturer packing lists
  • Heat-linked traceability map
  • ISO 9001:2015 quality system certificate
Request a Sample Documentation Pack
In Summary

A complete SAEP-347 documentation package consists of five elements. First, the EN 10204 3.1 mill test certificate: an original document from the producing mill stating chemical composition and mechanical test results, bearing the certifying inspector's signature — photocopies are not accepted. Second, a Certificate of Conformance (CoC) from the stockist referencing the specific Annex 4 material number and applicable SAMSS or ASTM standard. Third, a packing list tied to the MTC by heat number so each physical item can be matched to its test data. Fourth, supplementary test reports where required: Charpy impact data for low-temperature service grades, and PMI reports for alloy materials. Fifth, a third-party inspection report to EN 10204 3.2 for safety-critical categories where the purchase order specifies independent witness. Common Goods Receipt rejection reasons include: missing heat number on the MTC, photocopy submitted instead of an original MTC, CoC not referencing the Annex 4 number, and date discrepancies between documents. Gulf Union Ozone pre-checks all five elements before dispatch.

SAEP-347 Approved Vendor

What Does 'SAEP-347 Approved Vendor' Mean?

The phrase SAEP-347 approved vendor or SAEP-347 approved stockist means a supplier who has been reviewed by Saudi Aramco's procurement and inspection departments and placed on the Aramco Approved Suppliers List (ASL) for the relevant material categories.

Approval involves a vendor qualification audit that assesses the supplier's quality management system, storage facilities, documentation processes, and capability to supply materials meeting SAEP-347 requirements. Aramco may conduct on-site visits and document audits as part of this process. For more on the qualification process, see our Aramco 9COM vendor qualification guide.

Gulf Union Ozone Trading Co. (CR 4030570569) is ISO 9001:2015 certified and operates quality systems aligned with SAEP-347 requirements. We supply to EPC contractors and procurement agents working directly with Saudi Aramco, Saudi Aramco affiliated companies, and Royal Commission for Jubail and Yanbu projects that apply equivalent standards.

Our Compliance Credentials

✓ ISO 9001:2015 Quality Management System
✓ CR 4030570569 — Licensed Jeddah Stockist
✓ Full MTC archive retained 10 years
✓ 59 Annex 4 material numbers stocked
✓ PMI testing available on request
In Summary

A SAEP-347 approved vendor is a supplier who has completed Saudi Aramco's three-stage vendor qualification process and been placed on the Approved Vendors List (Annex 5). Stage 1 is a documentation review: the supplier submits its ISO 9001:2015 quality system documentation, quality manual, and evidence of material stocking capability for Saudi Aramco's initial assessment. Stage 2 is an on-site audit covering four areas: warehouse inspection to verify material segregation by Annex 4 number and physical marking compliance; MTC archive review to confirm a minimum 10-year retention capability; lot-control system verification to confirm heat-number matching between stock and documentation; and CoC generation capability assessment. Stage 3 is Annex 5 placement, followed by annual renewal. Annual renewal requires no documented quality failures during the preceding period, continued ISO 9001:2015 certification, and a re-audit if the supplier expands its approved material categories. Gulf Union Ozone (CR 4030570569) has maintained SAEP-347 approved status continuously since initial qualification and stocks all 59 Annex 4 material numbers.

FAQ

Frequently Asked Questions — SAEP-347

What is SAEP-347?

SAEP-347 is Saudi Aramco Engineering Procedure titled 'Supplying Material from Stockists.' It defines the requirements that stockist suppliers must meet when supplying valves, pipe fittings, flanges, and metallic piping for use in Saudi Aramco facilities. The procedure specifies approved material grades, mandatory documentation (MTCs, CoCs), and a list of 59 stockable material numbers in Annex 4.

What is the SAEP-347 Annex 4 material numbers list?

SAEP-347 Annex 4 — List of Stockable 9COMS — contains 59 specific Aramco material numbers that may be sourced from approved stockists. These include 23 valve numbers (ball, gate, globe, check, butterfly, plug), 11 flange numbers, 13 fitting numbers (elbows, tees, reducers, caps), and 12 metallic pipe numbers covering carbon steel, alloy steel, and stainless steel grades.

What documentation does SAEP-347 require from a stockist supplier?

SAEP-347 requires stockist suppliers to provide: Material Test Certificates (MTCs) showing chemical composition and mechanical properties, Certificates of Conformance (CoC), original mill certificates with heat and lot numbers, traceability documentation linking the material to a specific mill heat, and where specified, third-party inspection reports. All documentation must be retained and traceable.

Who needs to comply with SAEP-347?

Any contractor, subcontractor, or procurement agent sourcing valves, pipe fittings, flanges, or metallic piping from a stockist (rather than direct from manufacturer) for use on a Saudi Aramco project must ensure the stockist complies with SAEP-347. This applies across all Aramco facilities in the Eastern Province and across the Kingdom.

Does Gulf Union Ozone comply with SAEP-347?

Gulf Union Ozone Trading Co. stocks products compatible with all 59 SAEP-347 Annex 4 material numbers. We supply full Material Test Certificates (MTCs), Certificates of Conformance, and mill traceability documentation with every order. We are ISO 9001:2015 certified and registered with Saudi Aramco's procurement system. CR 4030570569.

Related Resources

Further Reading

Reference List
All 59 SAEP-347 Annex 4 Material Numbers
Full reference table: 23 valve numbers (V-101 to V-123) and 36 pipe, fitting & flange numbers (P-101 to P-136), with ASTM/API standards and MTC status.
SAEP-347 Stockist
SAEP-347 Compatible Stockist — 59 Material Numbers
Gulf Union Ozone stocks all 59 Annex 4 numbers in Jeddah. ISO 9001:2015, EN 10204 3.1 MTCs, TPI available.
How-To Guide
Material Traceability & MTC Guide
Step-by-step guide to what MTCs must contain and how to read traceability documentation for Aramco acceptance.
Procurement Guide
SAEP-347 Materials Sourcing Guide
Complete procurement guide for Aramco contractors sourcing SAEP-347 materials in Saudi Arabia.
Explainer
EN 10204 3.1 vs 3.2: Mill Test Certificate Guide
Which MTC type Aramco requires for valves, fittings, flanges, and piping — and the difference between 3.1 and 3.2.
Buyer's Guide
7-Point Checklist: How to Evaluate a SAEP-347 Stockist
CR registration, Annex 4 coverage, EN 10204 3.1 MTRs, NACE compliance, ISO 9001, local stock, and RFQ response — what to verify before placing an order.
Western Region Stockist
SAEP-347 Stockist in the Western Region — Jeddah
Jeddah-based SAEP-347 Annex 4 stockist serving Yanbu, Rabigh, Petro Rabigh, YASREF, and all western region Aramco projects. 59 material numbers, EN 10204 3.1 MTCs, 48–72h dispatch.
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Gulf Union Ozone Trading Co. · CR 4030570569 · Jeddah, Saudi Arabia

SAEP-347 Supply by Industrial City

Detailed SAEP-347 valves, flanges, and pipe fittings supply guides for each major Saudi industrial hub — local delivery times, stocked grades, and Annex 4 documentation.

Jubail Industrial City
Dammam — Eastern Province
Yanbu Industrial City
Al Khobar
Riyadh
Jeddah