Stainless Steel 904L U Tubes, 904L Stainless Steel U Tube Manufacturer, SS 904L U Tube Supplier, SS 904LU Tube Exporter, Stainless Steel 904L Precision Tubing, SS 904L Small Diameter Tube ,SS 904L U Tubes
Stainless Steel 904L U-Tubes from Sumer Metal Industries Private Limited are engineered for customers who require superior corrosion resistance in aggressive chemical and marine environments. Manufactured using UNS N08904 (904L) super-austenitic stainless steel, these U-tubes combine high nickel, molybdenum and copper content to resist pitting, crevice corrosion and stress corrosion cracking — making them ideal for heat exchangers, condensers and process equipment in sulfuric and phosphoric acid services as well as seawater applications. Sumer Metal Industries follows strict quality controls (material traceability, positive material identification and test certificates) to ensure every U-tube meets client and international standards.
As an experienced manufacturer, supplier and global exporter, Sumer Metal Industries produces seamless and welded 904L U-tubes in sizes and wall thicknesses suitable for shell-and-tube heat exchangers, economizers and condensers. Typical manufacturing steps include precision bending to U geometry (controlling bend radius to avoid work-hardening), full anneal where required, normalization and final pickling/passivation to restore corrosion resistance after forming. The company offers value-added services — end-finishing, end-polishing, tested bends, packing for ocean shipment and documentation (MTC / EN 10204) — to meet import regulations and customer specifications in destination markets.
Sumer Metal Industries maintains an export focus on the Middle East and Gulf region (Oman, Qatar, Saudi Arabia, the UAE, Kuwait), key European markets (Spain, Germany), North America (USA, Canada) and several regions across Africa. For these markets the company supports customs and shipping documentation, export-grade packaging, and can provide material certifications and inspection reports (third-party inspection by Lloyd’s / TPI on request). Their logistics team coordinates sea-freight and air freight options, and they routinely ship bulk consignments and just-in-time orders for OEMs and EPC contractors.
In applications the 904L U-tube excels where chlorides, reducing acids or warm seawater are present and where 300-series stainless steels are insufficient. The alloy’s copper content gives improved resistance to sulfuric acid and its high nickel content reduces susceptibility to chloride stress corrosion cracking. Because of this, Sumer Metal Industries recommends 904L U-tubes for chemical process exchangers, offshore platforms, desalination plants, pharmaceutical heat exchange duties and specialty food processing lines where longevity and low lifecycle maintenance are priorities.
Specification of Stainless Steel 904L U Tubes
| Material | Stainless Steel 904L (UNS N08904) |
|---|---|
| Standards | ASTM A312 / A269 (tubes), EN 10088 / EN 10204 (certs) |
| Product Forms | Seamless U-tubes, Welded U-tubes (precision bent) |
| Surface Finish | Mill finish, Pickled, Electro-polished (optional) |
| Certifications | MTC EN 10204 3.1 / 3.2 available, PMI report on request, Third-party inspection optional |
| Packing | Export wooden crates / pallets, vacuum packing / rust inhibitors available |
Quality and testing for Sumer Metal Industries’ 904L U-tubes include dimensional inspection, hydrostatic testing (where requested), PMI (Positive Material Identification) to confirm chemistry, hardness checks, and corrosion testing data upon request. Mechanical and chemical test certificates (EN 10204 3.1 / 3.2) are available for each batch. Sumer Metal Industries also supports OEM engineering teams with tube bundle drawings, bend radii recommendations, and advise on tube-sheet hole tolerances to ensure leak-free assemblies and optimal thermal performance.
Chemical Composition of Stainless Steel 904L U Tubes
| Element | Typical Range (wt%) |
|---|---|
| Chromium (Cr) | 19.0 – 23.0% |
| Nickel (Ni) | 23.0 – 28.0% |
| Molybdenum (Mo) | 4.0 – 5.0% |
| Copper (Cu) | 1.0 – 2.0% |
| Carbon (C) | ≤ 0.020% |
| Manganese (Mn) | ≤ 2.0% |
| Silicon (Si) | ≤ 1.0 – 1.0% |
| Phosphorus (P) | ≤ 0.045% |
| Sulfur (S) | ≤ 0.010% |
| Iron (Fe) | Balance |
In summary, Stainless Steel 904L U Tubes offer a robust solution for industries requiring high corrosion resistance, excellent strength, and precision performance. With their ability to perform under extreme environmental conditions, these tubes are a preferred choice for U and control systems in some of the world’s most demanding applications.
Specification of Stainless Steel 904L U Tubes
| Material | Stainless Steel 904L (UNS N08904) |
|---|---|
| Standards | ASTM A312 / A269 (tubes), EN 10088 / EN 10204 (certs) |
| Product Forms | Seamless U-tubes, Welded U-tubes (precision bent) |
| Surface Finish | Mill finish, Pickled, Electro-polished (optional) |
| Certifications | MTC EN 10204 3.1 / 3.2 available, PMI report on request, Third-party inspection optional |
| Packing | Export wooden crates / pallets, vacuum packing / rust inhibitors available |
🏭 Industry & Application
- ✅ SS 904LU Tubes for Medical Industry
- ✅ SS 904LU Tubes for Chemical Processing
- ✅ SS 904L Tubes for U Lines
- ✅ Stainless Steel 904L U Tubes for Gas & Liquid Flow
- ✅ SS 904L Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
- Q1: What makes 904L U-tubes better than 304/316 in chemical service?
- A: 904L contains significantly higher nickel, added molybdenum and copper, which improve resistance to pitting, crevice corrosion and sulfuric/reducing acids. This makes 904L preferable where chlorides and reducing acids are present and 300-series grades fail prematurely.
- Q2: Do you supply material certificates and third-party inspection for exported U-tubes?
- A: Yes — Sumer Metal Industries provides EN 10204 3.1/3.2 material test certificates, PMI reports and can arrange third-party inspection (e.g., Lloyd’s, TPI) prior to shipment on request.
- Q3: Can you manufacture custom OD / wall thickness and special bend radii for heat exchanger U-tubes?
- A: Absolutely — custom sizes, wall thicknesses, controlled bend radii and end finishing are available. Provide tube-bundle drawings and we will produce a quote and manufacturing plan.
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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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