Stainless Steel 304 Flanges — flange exporter to Saudi Arabia
Stainless Steel 304 flanges are corrosion‑resistant, formable, and widely used piping components. As a flange exporter to Saudi Arabia, we supply SS304 flanges conforming to international standards with full traceability, testing, and export documentation for petrochemical, desalination, food & beverage, pharmaceutical, power, and general industrial projects in Saudi Arabia.
Key benefits
- Corrosion resistance: Good performance in atmospheric and many chemical environments due to Cr–Ni composition.
- Versatility: Available as weld neck, slip‑on, blind, socket weld, threaded, and lap joint.
- Fabrication‑friendly: Excellent weldability and formability; suitable for welded and threaded systems.
- Cost‑effective: Lower cost than higher‑alloy grades while meeting many service requirements.
Standards & Material Specifications
- Base material: SS 304 (UNS S30400); low‑carbon variant SS 304L (UNS S30403) available.
- Common specs: ASTM A182 F304 (forged), ASTM A240 (plate).
- Dimensional standards: ASME B16.5 (NPS 1/2″–24″), ASME B16.47 (large bore), EN 1092, JIS.
- Pressure classes: 150, 300, 600, 900, 1500, 2500 (per ASME B16.5/B16.47).
Product Range
- Types: Weld neck, slip‑on, blind, socket weld, threaded, lap joint, reducing, long weld neck.
- Face styles: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ).
- Sizes: 1/2″–24″ (B16.5) and larger on request.
- Surface finish: Mill, polished, bead‑blasted; pickling/passivation available for stainless.
Mechanical & Chemical Typical Data (SS 304 / ASTM A182 F304)
Note: Values shown are typical ranges; final delivered material should be validated via MTC/MTR.
| Property | Typical Range / Value |
| Chemical composition (wt%) — C | ≤ 0.08 |
| Chemical composition — Cr | 18.0–20.0 |
| Chemical composition — Ni | 8.0–10.5 |
| Chemical composition — Mn | ≤ 2.0 |
| Chemical composition — Si | ≤ 1.0 |
| Chemical composition — P | ≤ 0.045 |
| Chemical composition — S | ≤ 0.03 |
| Density | ~8.00 g/cm³ |
| Tensile strength (ultimate) | 515–720 MPa (typical forged range) |
| Yield strength (0.2% offset) | ~205–310 MPa |
| Elongation (in 50 mm) | ≥ 40% (typical) |
| Hardness (HRB) | ~70–95 |
For information about SS 316 check out: SS316 Flanges Manufacturer
Comparison: SS 304 vs SS 304L
- SS 304L has lower carbon content (≤0.03) to minimize carbide precipitation during welding and provide improved resistance to intergranular corrosion after welding.
- Use SS 304L for heavy gauge weldments or applications requiring post-weld corrosion resistance; use SS 304 when slightly higher strength is desired.
Manufacturing & Quality Controls
- Raw material traceability: Maintain MTCs linked to heat numbers and lot IDs.
- Forging and machining: Use controlled forging temperatures and precision machining to maintain dimensional tolerances for flanges (per ASME/EN).
- Heat treatment: Annealing per spec, followed by controlled cooling when required.
- Surface finishing: Pickling/passivation to restore corrosion resistance after thermal/mechanical processing.
- Tests typically supplied: PMI or positive material identification, chemical & mechanical tests, UT or RT (radiography) for critical flanges, dimensional inspection, flange face flatness, and hydrostatic tests where applicable.
- Certifications: ISO 9001 quality management, PED (if supplying EU), NORSOK (if serving offshore), and customer-specific audits.
Testing, certification and export documentation
- PMI / chemical composition check (for material verification).
- Hardness testing (HRC/HV) for heat-treated alloys.
- Radiographic testing (RT) or ultrasonic testing (UT) for critical pressure classes.
- Positive Material Identification Certificate (3.1/3.2), MTRs.
- Hydrostatic test of welded assemblies where applicable.
- Third-party inspection (TPI) by client-approved agencies (ABS, BV, DNV, Lloyd’s, SGS).
Packaging & Export Readiness
- Protective packaging: Individual wrapping, wooden crates or pallets with corrosion inhibitors and desiccants.
- Documentation: Commercial invoice, packing list, bill of lading, MTC/MTR (EN 10204 3.1/3.2), test reports, export/import certificates, and COO (certificate of origin).
- Incoterms: Offer EXW, FOB, CFR, CIF depending on customer preference.
- Logistics: Sea freight consolidation for pallets/containers; expedited air shipments for urgent small orders.
Quality assurance & traceability
- Heat-to-part traceability recorded; unique serial/heat numbers laser-etched.
- Full MTRs (ASTM/EN) and 3.1/3.2 certificates issued by default.
- Welding records (WPS/PQR), NDT logs and inspector sign-offs available.
- Continuous improvement via process monitoring and internal audits.
Applications & Industries
- Petrochemical and refineries (process piping, heat exchangers).
- Food & beverage (sanitary piping, hygienic flanges).
- Pharmaceutical (process systems requiring corrosion resistance).
- Water treatment and desalination.
- Power plants (balance-of-plant piping).
- General industrial and structural applications.
Commercial Considerations for Buyers
- MOQ (minimum order quantity): State your standard MOQs and note flexibility for stocked items.
- Lead times: Typical 4–8 weeks depending on size and certification requirements; expedite options for stocked SKUs.
- Pricing factors: Material market price (Ni & Cr), flange type, size, pressure class, testing/certification level, and finish.
- Sample policy: Offer sample pieces or small trial lots for new buyers; provide sample MTCs.
Export Data Table
| Parameter | Typical Export Range / Options | Notes for Exporters |
| Sizes supplied | 1/2″–24″ (ASME B16.5); larger on request | Stock common sizes for faster exports |
| Pressure ratings | 150#–2500# | Match buyer spec (ASME or EN) |
| Material specs | ASTM A182 F304, ASTM A240, UNS S30400 | Include SS 304L (ASTM A182 F304L) as option |
| Face types | RF, FF, RTJ | RTJ for high-pressure/high-integrity applications |
| Surface finish | Mill, 1B, 2B, polished | Sanitary markets often need polished finishes |
| Testing | PMI, Chemical, Mechanical, UT/RT, Hydro | Provide MTC EN 10204 3.1/3.2 on request |
| Packaging | Corrosion-inhibitor wrap, wooden crate | Export-grade packaging prevents transit damage |
| Certifications | ISO 9001, PED, NORSOK (if applicable) | Tailor certifications per target market |
| Lead time | 2–8 weeks typical | Stocked items <2 weeks; custom forged longer |
| Payment terms | T/T, L/C at sight, CAD | Offer competitive payment terms for new buyers |
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