Description
Product Specifications and Technical Data
Good Mid-Range Corrosion Resistant Alloy
- ✓Mid-range corrosion resistant alloy
- ✓Decent mechanical strength to 1000°F
- ✓Alloy 20 chemistry and specifications
- ✓Alloy 20 sulfric acid performance
- ✓Weld neck flange features and benefits
- ✓Alloy 20 Datasheet
Also known as Carpenter 20 and 20CB-3, Alloy 20 weld neck flanges offer users a combination of nickel, chromium, molybdenum, and copper which provides good general corrosion resistance. Alloy 20 weld neck flanges are best suited for mid-range corrosion use – better than steel alloys but not at the level of high performance nickel based alloys like Hastelloy C276. Alloy 20 is a nickel alloy that was initially designed to withstand the harsh environment of hot sulfuric acid but also performs well in a variety of other acids. Alloy 20 weld neck flanges are an ideal choice when you don’t need the corrosion resistance power and price-tag of high performance nickel alloys like Hastelloy C276; but you need something that will give you more protection than 316 stainless steel or even a Super Duplex 2507 stainless steel.
Corrosion Resistance Alloy 20 weld neck flanges provide good performance in hot sulfuric acid, specifically they offer good resistance to stress-corrosion cracking in boiling sulfuric acid at specific range of 20% to 40% concentration, as well as general sulfuric acid resistance. Alloy 20 offers solid acid protection and will perform better than Duplex or even Monel, but for high temperature and high concentration acids, you may need to look to Inconel or Hastelloy fasteners. In addition, Alloy 20 weld neck flanges also show useful resistance to phosphoric acid and nitric acid.
Mechanical Properties• Ultimate tensile strength: 80 ksi• Yield strength: 35 ksi• Density: 0.292 lb/in.3• Electrical Resistivity (RT) 651 ohm-cir mil/ft• Elongation: 30%
TemperatureIn addition to their corrosion resistance, Alloy 20 weld neck flanges also perform well at moderately high temperatures, with the ability to maintain their mechanical strength up to 1000°F.
WeldingAlloy 20 weld neck flanges are stabilized with Columbium to minimize carbide precipitation during welding. In addition it offers intergranular corrosion resistance in the as-welded condition.
Applications• Power plants rely on alloy 20 weld neck flanges for flue-gas desulfurization• Alloy 20 weld neck flanges are used to connect heat exchangers, mixing tanks, metal cleaning equipment, pickling tanks and racks, and piping in mid-range corrosive chemcial processing environments.• Alloy 20 weld neck flanges help solve corrosion issues in food and dye production.• Manufacturers of plastics and synthetic rubber also utilize alloy 20 fasteners.
Flange Types Available: Blind Flanges, Lapped Joint Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Weld Neck Flanges
Flange Dimensions Reference
Precision-Engineered raised face weld neck for Critical Industrial Service
The raised face weld neck 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: raised face weld neck Specifications
SASA FLANGE manufactures the raised face weld neck 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 raised face weld neck Performs
Oil and gas facilities install the raised face weld neck 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 raised face weld neck Shipped Fast – Request a Quote Today
SASA FLANGE manufactures the raised face weld neck 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. |
raised face weld neck Application Scenario
The raised face weld neck 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 raised face weld neck ensures leak-free connections and long-term service reliability in demanding environments.
raised face weld neck installed in industrial piping system
Frequently Asked Questions
Q: What is a raised face weld neck used for?
A: The raised face weld neck 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 raised face weld neck?
A: SASA FLANGE offers the raised face weld neck 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 raised face weld neck support?
A: The raised face weld neck 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 raised face weld neck comply with?
A: SASA FLANGEmanufactures the raised face weld neck 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 raised face weld neck?
A: SASA FLANGE maintains ready stock of standard raised face weld neck 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.
