Duplex Steel S31803 U Tubes, Duplex Steel 31803 U Tubes, 31803 Duplex Steel U Tube Manufacturer, Duplex Steel 31803 U Tube Supplier, Duplex Steel 31803 U Tube Exporter, Duplex Steel 31803 Precision Tubing, Duplex Steel 31803 Small Diameter Tube ,Duplex Steel 31803 U Tubes
Sumer Metal Industries Private Limited is a trusted manufacturer, supplier and exporter of high-quality Duplex Steel S31803 U Tubes, engineered specifically for demanding heat-exchanger and process piping applications. Our S31803 U Tubes combine the strength and corrosion resistance of duplex stainless steel with precision U-bend forming for compact and efficient heat transfer assemblies. We supply finished U‑tubes and U‑tube bundles to customers across Oman, Qatar, Saudi Arabia, the UAE, Kuwait, Spain, Germany, the USA, Canada and many regions in Africa.
Duplex S31803 (also known commercially as Duplex 2205 or UNS S31803) offers an attractive balance of austenitic and ferritic microstructures that gives it higher strength than standard austenitic grades and excellent resistance to chloride stress corrosion cracking. Our U tubes are produced from hot‑rolled and cold‑rolled seamless and welded tube stock following strict quality controls — material traceability, heat treatment, NDT (where requested), and dimensional checks are standard parts of our process. Tubes are delivered in annealed condition and can be supplied with U‑bends formed to customer‑specified radii.
Typical applications for Duplex S31803 U Tubes include sea‑water cooled heat exchangers, oil & gas heat recovery systems, desalination plants, chemical process exchangers, and other high‑stress, chloride‑containing environments. The higher yield strength of duplex steel allows for reduced wall thickness for the same design pressure, giving weight and cost savings in fabricated bundles while retaining safety margins.
Quality and certification are central to our offering — Sumer Metal Industries provides material test reports (MTRs) per EN 10204 3.1, PMI/chemical test certificates on request, and can accommodate additional third‑party inspection (TPI) such as Lloyd’s, DNV, ABS or Bureau Veritas when required by project specifications. Surface finishes, end‑preparations, U‑bend radii, and packaging options are customizable to meet OEM or project demands.
Specification of Duplex Steel S31803 U Tubes
| Specification | Details |
|---|---|
| Grade / Material | Duplex Stainless Steel S31803 (UNS S31803 / Duplex 2205) |
| Product Form | U-Bent Tubes (Seamless / Welded) |
| Standards | ASTM A789 / ASTM A790 (for duplex stainless steel tubes) |
| Outer Diameter (OD) | 15.88 mm – 38.10 mm (5/8” – 1 ½”) custom sizes available |
| Wall Thickness (WT) | 0.89 mm – 3.05 mm custom thicknesses available |
| Length | Up to 12 m (straight before U-bend); U-bend radius as per client requirement |
| Bend Radius | As per ASME / TEMA or customer specification |
| Surface Finish | Mill Finish / Pickled & Passivated / Bright Annealed / Electropolished (on request) |
| Delivery Condition | Solution Annealed and Stress Relieved (as required) |
| End Finish | Plain End, Beveled End, Threaded (on request) |
| Testing & Certification | Hydrostatic Test, PMI, NDT, EN 10204 3.1 / 3.2 certificates, Third-Party Inspection available |
| Applications | Heat exchangers, condensers, chemical process equipment, desalination plants, oil & gas heat recovery systems |
We also support technical services such as tube cutting, end‑finishing, chamfering, flattening checks, and bundle assembly support. Our export packaging is compliant with international shipping standards and optimized to protect the U‑shaped tubes during long sea/air transit to destinations including the GCC, Europe, North America and Africa.
Chemical Composition of Duplex Steel S31803 U Tubes
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 |
| Silicon (Si) | ≤ 1.00 |
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Nitrogen (N) | 0.08 – 0.20 |
| Iron (Fe) | Balance |
With a proven track record as a Duplex Steel S31803 U Tubes exporter in over 30 countries, Sumer Metal Industries ensures global availability, third-party inspection support, and client-specific customization. Our wide export network combined with strict quality standards has made us a preferred choice for SS 31803 tubing worldwide.
Specification of Duplex Steel S31803 U Tubes
| Specification | Details |
|---|---|
| Grade / Material | Duplex Stainless Steel S31803 (UNS S31803 / Duplex 2205) |
| Product Form | U-Bent Tubes (Seamless / Welded) |
| Standards | ASTM A789 / ASTM A790 (for duplex stainless steel tubes) |
| Outer Diameter (OD) | 15.88 mm – 38.10 mm (5/8” – 1 ½”) custom sizes available |
| Wall Thickness (WT) | 0.89 mm – 3.05 mm custom thicknesses available |
| Length | Up to 12 m (straight before U-bend); U-bend radius as per client requirement |
| Bend Radius | As per ASME / TEMA or customer specification |
| Surface Finish | Mill Finish / Pickled & Passivated / Bright Annealed / Electropolished (on request) |
| Delivery Condition | Solution Annealed and Stress Relieved (as required) |
| End Finish | Plain End, Beveled End, Threaded (on request) |
| Testing & Certification | Hydrostatic Test, PMI, NDT, EN 10204 3.1 / 3.2 certificates, Third-Party Inspection available |
| Applications | Heat exchangers, condensers, chemical process equipment, desalination plants, oil & gas heat recovery systems |
🏭 Industry & Application
- ✅ Duplex Steel S31803 U Tubes for Medical Industry
- ✅ Duplex Steel S31803 U Tubes for Chemical Processing
- ✅ Duplex Steel S31803 Tubes for U Lines
- ✅ Duplex Steel S31803 U Tubes for Gas & Liquid Flow
- ✅ Duplex Steel S31803 Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:How should I optimize a product page for "Duplex S31803 U Tubes"?
Use the exact keyword phrase in the page title, H1, first paragraph, and in image alt text. Add supporting long‑tail keywords such as "Duplex 2205 U tubes for heat exchangers", "S31803 U bent tubes supplier", and location‑based modifiers (e.g., "supplier in UAE"). Include technical tables (composition, dimensions) so the page ranks for technical query intent.
Q2:What meta description should I use to improve CTR?
Keep it under ~150–160 characters, clearly state the product and benefit, and include a call to action. Example meta description (exact 155 chars): "Buy Duplex S31803 (Duplex 2205) U Tubes — high‑strength, corrosion‑resistant U‑bends for heat exchangers. Exports to GCC, Europe, USA & Canada. Get a quote."
Q3:Which meta keywords and title tag should I use?
Modern SEO ignores meta keywords, but if you must include them use a short, focused set: Duplex S31803 U Tubes, Duplex 2205 U tubes, S31803 U‑bends supplier, heat exchanger U tubes. Title tag example (60–70 chars recommended): "Duplex S31803 (2205) U Tubes — Manufacturer & Exporter | Sumer Metal".
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At Sumer Metal Industries Pvt. Ltd., we follow a zero-defect policy by implementing stringent quality checks, using certified raw materials, and continuously improving our processes to deliver reliable and consistent tubing solutions
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