Stainless Steel Flange
From Standard Industrial Flanges to Custom Flanges, we offer a wide variety of Stainless Steel flanges made from high-quality materials including carbon steel, stainless steel, alloy steel, duplex stainless steel, and other specialized metals. Our SS flanges are designed to meet various industry standards, including AWWA, ANSI, ASME, DIN, JIS, GB and BS. Trust us to provide reliable, customized solutions to protect your piping system.
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What are types of Stainless Steel Flanges ?
Stainless Steel Flanges come in several key types, selection depends on factors like pressure, temperature, ease of maintenance, and system requirements, each designed for specific applications:
- Weld neck flange: Offers superior strength for high-pressure and high-temperature systems
- Slip on flange: Easy to install and align, cost-effective for lower pressure applications
- Blind flange: Solid disc used to seal off pipe ends or openings
- Threaded flange: Allows quick assembly without welding, suitable for low-pressure systems
- Lap joint flange: Accommodates thermal expansion and frequent dismantling
- Socket weld flange: Provides excellent leak resistance for small-diameter, high-pressure pipes
Standards:
ASME/ANSI, EN/DIN, GOST, JIS
Pressure:
PN6, 10, 16, 25, 40
Class150, 300, 600, 900, 1500
Standards:
ASME/ANSI, EN/DIN, GOST, JIS
Pressure:
PN10, 16, 25, 40, 63, 100, 160
Class150, 300, 600, 900, 1500, 2500
Standards:
ASME/ANSI, EN/DIN, GOST, JIS
Pressure:
PN2.5, 6, 10, 16, 25, 40
Class150, 300, 600, 900, 1500, 2500
Standards:
ASME/ANSI, EN/DIN, GOST, JIS
Pressure:
PN2.5, 6, 10, 16, 25, 40, 63, 100, 160
Class150, 300, 600, 900, 1500, 2500
Standards:
ASME/ANSI, EN/DIN, GOST, JIS
Pressure:
PN10, 16, 25, 40, 63, 100
Class150, 300, 600, 900
Standards:
ASME/ANSI, EN/DIN, GOST, JIS
Pressure:
PN6, 10, 16, 25, 40
Class150, 300, 600
Our custom flanges are made to specific sizes and materials for unique applications. Can be modified from standard designs or created from scratch to meet various industry requirements.
What are Industry Standards of Pipe Flanges?
ANSI (American National Standards Institute):
Sizes: Typically from 1/2″ to 24″ for ANSI B16.5; larger sizes for ANSI B16.47.
Pressure Ratings: Ranges from 150 LB to 2500 LB.
ASME (American Society of Mechanical Engineers):
Sizes: ASME B16.5 NPS 1/2 through NPS 24; ASME B16.47 NPS 26 through NPS 60.
Pressure Ratings: Up to 2500 LB.
DIN (Deutsches Institut für Normung):
Sizes: DN10 to DN4000.
Pressure Ratings: PN6 to PN400.
JIS (Japanese Industrial Standards):
Sizes: Ranges from 10A to 1500A.
Pressure Ratings: From 5K to 63K (K is a unit of pressure).
Stainless Steel Flange by Grades
304/304L Series Stainless Steel Flange
The 304 and 304L stainless steel flanges differ mainly in carbon content (0.08% vs 0.03%). 304 serves general industrial use in food and chemical equipment, while 304L excels in welded systems. Both contain 18% chromium and 8% nickel, with 304L preventing weld point corrosion, making it better for maintenance-heavy applications.
316L Series Stainless Steel Flange
316L steel flanges is the premium choice for harsh environments. It’s got 2% molybdenum added to the mix, making it tougher against corrosion than 304. The low carbon content (0.03%) means better welding properties. Marine equipment, chemical processing, and pharmaceutical plants use this grade extensively. When you need flanged stainless steel fittings that can handle aggressive chemicals or saltwater, 316L delivers.
2205 (F51) Duplex Metal Flange
2205 is the workhouse of the duplex range. With 22% chromium and 5% nickel, it’s twice as strong as regular stainless steel flanges. It resists corrosion better than 304 or 316L and costs less than super duplex options. Oil rigs, chemical plants, and high-pressure systems rely on 2205 flanges. It’s the sweet spot between performance and price for demanding applications.
2507 (F53) Super Duplex Steel Pipe Flange
2507 is the tank of flange materials. 25% chromium and 7% nickel make it virtually bulletproof against corrosion. It’s the strongest option in the lineup. Offshore platforms, desalination plants, and high-pressure chemical systems use 2507 flanges. When failure isn’t an option, and budget isn’t your primary concern, this is your material.
TP310S Stainless Steel Flange
TP310S handles extreme heat like a champion. With 25% chromium and 20% nickel, it’s built for high-temperature applications. You’ll find these flanges in furnaces, heat exchangers, and hot chemical processing. When your system runs hot enough to make other grades sweat, TP310S keeps its cool.
TP321 Stainless Steel Pipe Flange
TP321 is the titanium-enhanced version of 304. The titanium addition prevents corrosion issues during welding and high-temperature use. Aircraft parts, chemical processors, and pressure vessels use this grade. It’s the go-to choice when you need a ss flange that can handle both heat and frequent welding without compromising strength or corrosion resistance.
Compliance Certificates
Why Choose LONGAN Flange?
- Expertise in Flange Manufacturing: Longan Flange specializes in producing a wide range of flanges and custom non-standard products, ensuring we meet diverse industry needs with precision.
- Advanced Manufacturing Capabilities: With over 100 CNC lathes, 10 machining lathes, and 16 high-precision machining centers, we leverage advanced technology for efficient and high-quality production.
- Rigorous Quality Assurance: Our independent laboratory equipped with 15 testing devices ensures extensive testing of each flange, guaranteeing they meet specifications and providing reliable performance.
- Commitment to Customization and Standards: We offer tailor-made solutions while adhering to established industry standards, ensuring seamless compatibility and exceptional quality tailored to your project requirements.
Frequently Asked Questions (FAQs)
Yes, we are the manufacturer. Long’an Flange specializes in manufacturing various types of flanges and customizing non-standard products.
Our pricing is based on quality advantages at the same price point
Yes, we provide certifications. We have obtained many domestic and international certifications, including CE, Quality Management System, and Environmental Management System certifications.
We accept Letter of Credit (L/C), Telegraphic Transfer (T/T), and Document against Payment (D/P) as payment methods.
When you buy forged flange parts, you don’t have to buy a certain amount. But if you want a length that’s more than 2 meters, you’ll need to buy at least 10 pieces.
It usually takes us 2 to 4 weeks to make your order, but it depends on how complicated it is and how busy we are.
Yes, we offer OEM services for customized non-standard flanges.
We package our big, heavy flanges in wooden crates and the small, light ones in cardboard boxes. The choice depends on what kind of flange it is, its size, weight, and how far it needs to be transported.
We offer many ways to ship your items, like by truck or boat. We’ll find the best way for you based on your needs.
When making flanges, we mainly use stainless steel, but we also use other special materials based on what the flange is for and what the customer wants.
