Detailed Product Specifications & Applications:
BENKOO METAL's welded stainless steel pipes are engineered to provide dependable performance in environments where failure due to corrosion or mechanical stress carries significant risk. The welded manufacturing process allows for exceptional consistency and economic advantages in large diameters, making our pipes ideal for major industrial projects.
Primary Industry Applications
The table below outlines the critical uses of our pipes across key sectors:
Industry Sector | Specific Applications | Key Material Challenges | BENKOO METAL Value Proposition |
Power Generation | • FGD Scrubber Liners & Ducting | Chloride-induced pitting, acidic sulfate environments, erosion, microbiologically influenced corrosion (MIC). | Optimal grade selection (e.g., 316L, 317L) for specific corrodents, ensuring scrubber and cooling system longevity. |
Oil, Gas & Petrochemical | • Overhead Condenser Piping | H₂S stress corrosion cracking (SSC), chloride exposure, general corrosion from process streams. | Supply of stabilized grades (321/347) for high-temp areas and Mo-alloyed grades for chloride resistance, enhancing plant safety. |
Marine & Offshore | • Seawater Cooling & Ballast Piping | Severe pitting/crevice corrosion in seawater, marine atmospheric corrosion, high mechanical loads. | Provision of 316/316L as standard and higher alloys for critical zones, ensuring vessel and platform integrity. |
Desalination & Water | • High-Pressure RO Membranes Piping | Extreme chloride concentrations, high pressures, biofouling. | Pipes with superior internal surface finish and corrosion resistance, maximizing plant uptime and output. |
Comprehensive Material Grades & International Standards
BENKOO METAL supplies a full spectrum of austenitic stainless steel grades. The following tables provide a clear reference for grade equivalents and governing standards.
Austenitic Stainless Steel Grade Comparison (Welded Pipe)
Common Name | UNS Number (USA) | EN Material No. (Europe) | JIS Grade (Japan) | Key Characteristics & Typical Use Case |
304 / 304L | S30400 / S30403 | 1.4301 / 1.4307 | SUS 304 / SUS 304L | General purpose. Fresh water, atmospheric exposure, non-aggressive chemical service. |
316 / 316L | S31600 / S31603 | 1.4401 / 1.4404 | SUS 316 / SUS 316L | Standard for marine/chloride environments. 2-3% Mo adds pitting resistance. For seawater cooling, coastal power. |
317 / 317L | S31700 / S31703 | 1.4438 | SUS 317L | Higher Mo (~3-4%) for aggressive chemicals, sulfuric/phosphoric acid. Used in severe FGD & chemical process areas. |
321 | S32100 | 1.4541 | SUS 321 | Ti-stabilized. Prevents sensitization during welding. High-temperature piping, power plant exhaust sections. |
347 | S34700 | 1.4550 | SUS 347 | Nb-stabilized. Excellent intergranular corrosion resistance post-welding. Similar applications to 321. |
904L | N08904 | 1.4539 | - | High Mo, Cu, Cr alloy. Superior resistance to sulfuric acid and chlorides. For severe chemical and offshore service. |
Governing Product Standards by Region
Standard System | Standard Number | Title / Scope | Common Grade Reference |
American (ASTM/ASME) | ASTM A312/A312M | Seamless, Welded, and Cold-Worked Austenitic SS Pipe | 304, 304L, 316, 316L, etc. |
| ASTM A358/A358M | Electric-Fusion-Welded Austenitic SS Pipe (High-Temp/Corrosive Service) | All grades, common for large diameters. |
| ASTM A409/A409M | Welded Large Diameter Austenitic SS Pipe | Grades for diameters > 18". |
European (EN) | EN 10217-7 | Welded Steel Tubes for Pressure Purposes – Stainless Steel | 1.4301, 1.4401, 1.4438, etc. |
Japanese (JIS) | JIS G3459 | Stainless Steel Pipes for Ordinary Piping | SUS 304, SUS 316, etc. |
| JIS G3468 | Large Diameter Welded Stainless Steel Pipes | SUS grades for diameters typically > 18". |
Product Size Range & Technical Data
BENKOO METAL provides exceptional flexibility to meet project design requirements.
Parameter | Standard Range | Extended/Custom Capability | Notes |
Outside Diameter (OD) | 3" NB to 40" NB | Up to 60" NB (1524 mm) and larger | Sizes follow ASME B36.19M dimensions. Larger diameters for outfalls, scrubber ducts. |
Wall Thickness | Schedules: 5S, 10S, 20S, 40S, 80S, 120S, 160S | Custom thicknesses available | Designed to meet ASME B31.3/B31.1 pressure ratings and mechanical requirements. |
Standard Length | Up to 12 meters (or as per std.) | Custom random or exact lengths | Optimized for shipping and to minimize site welds. |
Welding & Finishing | SAW (Submerged Arc) for large diameters, TIG/Plasma for high purity. Solution Annealed, Pickled & Passivated (APP). | Various weld procedures, mechanical polishing, electro-polishing. | Ensures weld integrity and restores optimal corrosion resistance. |
Quality Assurance & The BENKOO METAL Commitment
Every pipe supplied by BENKOO METAL is a product of a stringent quality management system:
Full Traceability: EN 10204 3.1/3.2 Type Mill Test Certificates with heat number traceability.
Comprehensive Testing: Includes Hydrostatic Testing, Non-Destructive Testing (RT or UT as specified), chemical analysis, and mechanical tests.
Technical Support: Our engineering team assists with material selection, standard interpretation, and application-specific queries.
Global Supply Chain: Reliable logistics to deliver certified material to job sites worldwide, on schedule.
Choose BENKOO METAL for your next critical project. Contact our sales team for quotations, detailed technical datasheets, or to consult with our specialists.
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