Table of Contents
Introduction
Sanicro 28 Flanges are extensively used in piping applications that demand extreme corrosion resistance, superior structural integrity, and prolonged service life in highly aggressive chemical environments. As a trusted Sanicro 28 Flanges Exporter In India, Sankalp Alloys supplies premium-grade forged and machined flanges to clients operating across chemical processing, oil & gas, marine, acid manufacturing, power generation, and pollution control industries worldwide.
Manufactured from high-performance Sanicro 28 (UNS N08028 / Alloy 28) super-austenitic alloy, these flanges deliver outstanding resistance to strong acids like phosphoric and sulfuric acid, chloride pitting, crevice corrosion, and stress corrosion cracking. Sankalp Alloys exports precision-engineered Sanicro 28 Flanges that comply with global quality standards, ensuring leak-proof sealing and exceptional performance in severe industrial setups.
What are Sanicro 28 Flanges?
Sanicro 28 Flanges are high-alloy piping components engineered from a super-austenitic nickel-iron-chromium stainless steel with additions of molybdenum and copper. They are specifically crafted to connect pipes, valves, pumps, and heat exchangers in processing systems handling extremely severe corrosive media.
These flanges are available in diverse types including Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, and customized forged forms across pressure classes ranging from Class 150 to Class 2500. Sanicro 28 Flanges are indispensable in fertilizer plants, phosphoric acid evaporators, sour gas production tubing connections, seawater cooling lines, and heavy chemical processing facilities.
Chemical Composition & Mechanical Properties
Chemical Composition of Sanicro 28 (UNS N08028):
- Nickel (Ni): 30.0–34.0%
- Chromium (Cr): 26.0–28.0%
- Molybdenum (Mo): 3.0–4.0%
- Copper (Cu): 0.6–1.4%
- Iron (Fe): Balance
- Manganese (Mn): 2.0% max
- Silicon (Si): 0.7% max
- Carbon (C): 0.02% max
- Phosphorus (P): 0.03% max
- Sulfur (S): 0.015% max
Mechanical Properties:
- Tensile Strength: 500 MPa min
- Yield Strength (0.2% Offset): 214 MPa min
- Elongation: 40% min
- Exceptional resistance to phosphoric acid, sulfuric acid, and organic acids
- Superior defense against chloride-induced pitting, crevice corrosion, and stress corrosion cracking (SCC)
- High ductility, excellent weldability, and reliable long-term durability in sour gas environments
Applications of Sanicro 28 Flanges
Phosphoric & Sulfuric Acid Production
Sanicro 28 Flanges are widely deployed in wet-process phosphoric acid evaporators, reactors, concentration plants, and sulfuric acid piping systems where lower grade alloys suffer rapid degradation.
Oil & Gas Industry (Sour Gas Service)
Ideal for downhole tubing connections, surface piping, and gas treatment facilities containing high levels of hydrogen sulfide (H2S), carbon dioxide (CO2), and chloride ions.
Chemical Processing Industry
Used in chemical reactors, heat exchangers, acid handling systems, and fluid transport pipelines handling mixed aggressive acids, solvents, and corrosive chemicals.
Marine & Seawater Cooling Systems
Suitable for offshore platforms, coastal power stations, marine equipment, and seawater-cooled heat exchangers requiring high resistance to pitting and bio-fouling environments.
Pollution Control & Nuclear Industry
Widely utilized in flue gas desulfurization (FGD) scrubbers, waste treatment plants, and specialized nuclear power piping where long-term joint integrity is paramount.
Why Sanicro 28 Flanges are Preferred
Sanicro 28 Flanges are preferred over conventional stainless steel and lower-alloy nickel materials due to their ultra-high chromium (27%) and balanced nickel (31%) content. This chemical balance offers exceptional defense against both oxidizing and reducing media, preventing catastrophic pitting and stress corrosion cracking in high-chloride, acidic environments.
Their superior mechanical strength, excellent machinability, flawless seal face finishes, and robustness under extreme pressure cycles significantly reduce maintenance down-time and operational costs. These factors make Sanicro 28 Flanges a highly reliable and cost-effective choice for critical piping connections.
Why Choose Sankalp Alloys
Premium Export Quality
Sankalp Alloys follows strict quality control procedures to supply and export Sanicro 28 Flanges that strictly adhere to international dimensional and material standards for severe industrial duty.
Global Export Expertise
We regularly export high-grade Sanicro 28 Flanges to clients worldwide with seaworthy export packaging, custom wooden casing, complete documentation, and prompt transit schedules.
Custom Sizes & Pressure Ratings
We supply Sanicro 28 Flanges in diverse pressure ratings (150# to 2500#, PN6 to PN400), custom diameters, schedule thicknesses, and specialized facing types (RF, FF, RTJ) tailored to exact project blueprints.
Reliable Supply Chain
Our well-managed raw material inventory and streamlined export logistics ensure fast order execution, seamless international shipping, and complete client satisfaction.
Quality Standards & Certifications
Our Sanicro 28 Flanges comply with leading international quality standards, including:
- ASTM B709 / ASME SB709 (Plate, Sheet, and Flange Forging Specs)
- ANSI / ASME B16.5 & B16.47 (Pipe Flanges and Flanged Fittings)
- EN 1092-1 (Flanges and Their Joints)
- NACE MR0175 / ISO 15156 (Sour Gas Service Compliance)
- ISO 9001:2015 Quality Management Systems
Supply & Export of Sanicro 28 Flanges from India
Logistics and Delivery
Sankalp Alloys ensures secure, damage-free, and timely delivery of Sanicro 28 Flanges to international destinations through an established global logistics network and sturdy seaworthy packaging.
Documentation
We provide full export documentation with every shipment, including EN 10204 3.1 Material Test Certificates (MTC), NACE compliance certificates, third-party inspection reports, commercial invoices, and packing lists to facilitate hassle-free customs clearance.
Frequently Asked Questions (FAQs)
Q: What types of Sanicro 28 Flanges do you supply?
A: We supply Sanicro 28 Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, and custom forged flanges across various dimensions and pressure classes.
Q: Do you export Sanicro 28 Flanges worldwide?
A: Yes, Sankalp Alloys is a dedicated exporter sending premium Sanicro 28 Flanges to global markets with full export documentation and reliable logistics.
Q: Are Material Test Certificates provided with Sanicro 28 Flanges?
A: Yes, every dispatch includes EN 10204 3.1 Material Test Certificates (MTC), chemical/mechanical test results, and inspection reports for complete material traceability.
Q: Can you supply customized Sanicro 28 Flanges?
A: Yes, we export custom-machined Sanicro 28 Flanges in specialized dimensions, pressure ratings, wall thicknesses, and face finishes according to your engineering specifications.
Conclusion
Sanicro 28 Flanges are the ideal choice for high-integrity piping systems operating in severely corrosive environments. Their exceptional resistance to phosphoric acid, sulfuric acid, sour gas media, and chloride-induced pitting, combined with high mechanical strength, ensures long-term operational safety and reduced maintenance costs across chemical processing, oil & gas, and marine applications.
Sankalp Alloys is a premier Sanicro 28 Flanges Exporter In India, delivering top-quality forged flanges manufactured in full compliance with international standards. With precise machining capabilities, strict quality assurance, and an established global export network, we provide dependable flange solutions tailored to your project requirements.
Contact us today to receive a competitive quotation for your Sanicro 28 Flanges export requirements.