Description
Product Specifications and Technical Data
A mid-ranged corrosion resistant 6Mo alloy with good strength
- ✓50% stronger than stainless steel
- ✓Usable temperature limit of 1000°F
- ✓AL6XN chemistry & specifications
- ✓Weld neck flange features and benefits
- ✓AL6XN Datasheet
Originally developed to combat sea water corrosion, AL6XN has expanded its role as being good mid-range corrosion resistant alloy. AL6XN weld neck flanges are a low carbon, high purity, nitrogen-bearing “super-austenitic” stainless alloy. Also considered a 6Moly alloy, AL6XN flanges are similar in chemistry and capabilities to Alloy 926 and SMO 254. With a higher nickel and molybdenum content than Duplex 2205 and Super Duplex 2507, it delivers better corrosion resistance while giving a more cost effective alternative to nickel super alloys like Inconel or Hastelloy in moderately corrosive conditions.
Corrosion Resistance• Moderate general corrosion resistance• Excellent chloride / salt water protection• Good performance in phosphoric acid• Moderate resistance to nitric acid
Chemical ResistanceIn chemical processes which utilize chlorides, such as paper mills and waste water, stress corrosion cracking (SCC) is a common culprit for 316L stainless failures. Duplex alloys will outlast environments that will cause SCC in 316 stainless, but for more severe low PH environments, weld neck flanges made from higher nickel content alloys like AL6XN will generally work better. For the most extreme situations, alloys with >45% nickel content like Hastelloy are often considered.
Outstanding Resistance to Salt WaterSeawater is where AL6XN weld neck flanges outperform so many alloys providing protection to stress corrosion cracking, pitting and crevice corrosion in a broad range of marine applications. AL6XN weld neck flanges contain a minimum of 6% molybdenum content and it is this addition of molybdenum that provides the greatest protection against pitting and crevice corrosion.
Mechanical PropertiesElectrical Resistivity: 535 Ohm-circ mil/ftUltimate Tensile Strength: 108 ksi0.2% Yield Strength: 53 ksiDensity: 0.291 lb/in 3
Chemistry• High molybdenum content provides enhanced corrosion protection in chloride environments.• Carbon helps to prevent sensitization during welding• Chromium enhances pitting and crevice corrosion resistance• The interstitial strengthening effect of nitrogen gives AL6XN weld neck flanges good high strength properties
AL6XN Applications• Desalination plants depend on AL6XN weld neck flanges for the salt water corrosion protection• Pulp bleaching equipment and piping • The power industry uses AL6XN weld neck flanges where salt water and chlorides are present such as steam surface condensers, supercritical, high pressure, feed water heaters, steam surface condensers, flue-gas desulfurization equipment and in nuclear power water piping • Offshore • Chemical Processing – processing tanks, vessels and pipes as well as plate and frame heat exchangers.
Flange Types Available: Blind Flanges, Lap Joint Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Weld Neck Flanges
Flange Dimensions Reference
Precision-Engineered weld neck flanges for Critical Industrial Service
The weld neck flanges from SASA FLANGE delivers proven reliability for demanding piping systems.
Manufactured from certified Carbon Steel through precision forging and CNC machining processes.
Fully compliant with ANSI B16.5, ASME, DIN international standards, ensuring seamless global project integration.
The Carbon Steel construction provides excellent mechanical properties and long-term durability.
Widely trusted across oil and gas, chemical processing, power generation, and water treatment industries.
SASA FLANGE offers complete size and pressure class availability backed by 15 years of manufacturing expertise.
Complete Size and Pressure Coverage: weld neck flanges Specifications
SASA FLANGE manufactures the weld neck flanges in sizes from 1/2 inch to 60 inches per ANSI B16.5, ASME, DIN.
Available pressure ratings include Class 150-2500, suitable for utility services to ultra-high-pressure applications.
Sealing face configurations include Raised Face, Flat Face, Ring Type Joint, and Lap Joint options.
Surface treatments available: Anti-rust oil.
Every piece undergoes dimensional verification with calibrated instruments ensuring bolt hole accuracy and sealing surface integrity per applicable international standards.
From Refineries to Offshore Rigs: Where weld neck flanges Performs
Oil and gas facilities install the weld neck flanges in wellhead connections and process piping for critical pressure containment.
Chemical plants specify it for reactor vessels and heat exchanger connections requiring long-term corrosion resistance.
Power generation stations deploy it in steam cycle and cooling water systems.
Water treatment facilities use it throughout chemical dosing and distribution piping.
Marine and offshore installations rely on it for topside process piping in harsh saltwater environments.
Get Your weld neck flanges Shipped Fast – Request a Quote Today
SASA FLANGE manufactures the weld neck flanges to multiple international standards ensuring worldwide compatibility.
Standard sizes ship within 3-7 business days from stock; custom specifications manufactured in 15-30 days.
Every shipment includes Mill Test Certificate per EN 10204 3.1, PMI testing, and hydrostatic pressure testing under ISO 9001:2015 quality management.
Contact our engineering team at sales@sasaflange.com or WhatsApp +86 13764965049 for competitive quotations and technical support.
Why Choose SASA FLANGE?
15+ Years ExperienceEstablished flange manufacturer serving global industries since 2008. |
Multi-Standard ProductionManufacturing to ANSI, DIN, JIS, GOST standards with CMM inspection. |
Complete Material RangeCarbon, stainless, alloy steel with Mill Test Certificates. |
Fast DeliveryStock items ship 3-7 days. Custom orders 15-30 days. |
ISO 9001:2015 CertifiedQuality management ensuring consistent product reliability. |
Global ExportShipped to 50+ countries with professional packaging. |
weld neck flanges Application Scenario
The weld neck flanges is widely deployed across critical industrial sectors where reliable pipe sealing and pressure containment are essential. Typical application scenarios include:
From high-pressure refinery piping to municipal water distribution networks, the weld neck flanges ensures leak-free connections and long-term service reliability in demanding environments.
weld neck flanges installed in industrial piping system
Frequently Asked Questions
Q: What is a weld neck flanges used for?
A: The weld neck flanges creates secure, leak-proof pipe connections in industrial piping systems. Commonly installed in oil and gas, chemical processing, power generation, and water treatment facilities. Made from Carbon Steel per ANSI B16.5, ASME standards, it ensures reliable pressure containment. SASA FLANGE supplies full size range with certified quality documentation per EN 10204 3.1.
Q: What materials are available for the weld neck flanges?
A: SASA FLANGE offers the weld neck flanges in carbon steel (ASTM A105), stainless steel (A182 F304, F316, F316L), alloy steel (A182 F11, F22), and duplex (A182 F51, F53). Each grade provides specific advantages for different corrosion and temperature environments. Material selection depends on operating media, temperature, and pressure. Every piece includes Mill Test Certificate with verified chemical and mechanical properties.
Q: What pressure ratings does the weld neck flanges support?
A: The weld neck flanges is available in Class 150-2500 pressure classes per ASME standards. Pressure-temperature ratings depend on material grade and operating temperature. For example, A105 Class 150 handles 285 psi at ambient temperature. SASA FLANGE engineers can recommend the correct class for your specific operating conditions. Contact sales@sasaflange.com for pressure-temperature rating charts and selection guidance.
Q: What standards does the weld neck flanges comply with?
A: SASA FLANGEmanufactures the weld neck flanges per ANSI B16.5, ASME, DIN international standards. These standards govern dimensions, tolerances, materials, marking, and testing requirements. Our ISO 9001:2015 quality system ensures consistent compliance through calibrated inspection equipment and documented procedures. We also manufacture to project-specific specifications or customer drawings. Every product ships with full dimensional and material certification documentation.
Q: What is the delivery time for weld neck flanges?
A: SASA FLANGE maintains ready stock of standard weld neck flanges sizes and materials for 3-7 day delivery. Custom specifications require 15-30 days production time depending on complexity and quantity. We ship worldwide via sea freight, air freight, or express courier with professional packaging. Expedited production available for urgent orders. Contact sales@sasaflange.com or WhatsApp +86 13764965049 for current stock availability.
Packaging and Shipping
📦 Packing is quite important especially in the case of international shipments in which consignments pass through various channels to reach the ultimate destination, so we put special concern regarding packaging to ensure every piece arrives in perfect condition.
SASA FLANGE packs goods in numerous ways based on the product type and customer requirements. Our standard packaging options include:
- Plywood cases / crates – for heavy flanges and large-diameter products
- Pallets with shrink wrap – for bulk orders and standard sizes
- Individual poly bags + carton boxes – for small flanges and fittings
- Anti-rust oil coating + waterproof paper – for long-distance ocean freight
- Custom marking and labeling – per customer specifications or project requirements
All packaging meets international export standards. Special packing instructions are welcome upon request.
