Stainless Steel Flanges: Complete Guide to Grades 304, 316, and 321 for Industrial Applications
Introduction to Stainless Steel Flanges
Stainless steel flanges are critical components in piping systems across chemical processing, oil & gas, food processing, and pharmaceutical industries. As a leading flange manufacturer with over 30 years of experience, we understand the importance of selecting the right material grade for your specific application.
Understanding Stainless Steel Flange Grades
304 Stainless Steel Flanges
Type 304 is the most widely used austenitic stainless steel for flange manufacturing. It offers excellent corrosion resistance in most industrial environments and is cost-effective for general applications.
- Corrosion Resistance: Good resistance to oxidizing acids and atmospheric corrosion
- Temperature Range: -200°C to 800°C
- Common Applications: Food processing, chemical equipment, architectural applications
316/316L Stainless Steel Flanges
Type 316 contains molybdenum (2-3%), providing superior corrosion resistance, especially against chlorides and marine environments. The low-carbon 316L variant prevents sensitization during welding.
- Corrosion Resistance: Excellent resistance to chlorides, acids, and marine environments
- Temperature Range: -200°C to 850°C
- Common Applications: Marine equipment, pharmaceutical processing, chemical plants
321 Stainless Steel Flanges
Type 321 is stabilized with titanium, making it ideal for high-temperature applications where intergranular corrosion is a concern.
- Corrosion Resistance: Excellent intergranular corrosion resistance after welding
- Temperature Range: -200°C to 900°C
- Common Applications: Heat exchangers, boiler components, aerospace applications
Stainless Steel Flange Types Available
Our manufacturing facility produces all major flange types in stainless steel:
- Фланцы со сварной горловиной – For high-pressure applications
- Slip-On Flanges – Cost-effective for low-pressure systems
- Слепые фланцы – For pipeline isolation and testing
- Приварные фланцы – For small-diameter high-pressure piping
- Резьбовые фланцы – For systems where welding is not feasible
Standards and Certifications
All our stainless steel flanges are manufactured to international standards:
- ASME B16.5 / B16.47
- EN 1092-1
- GOST 33259-2015
- JIS B2220
- ISO 9001:2015 certified manufacturing
Why Choose Songhai as Your Flange Manufacturer?
Founded in 1994, Songhai has established itself as a trusted partner in flange manufacturing. Our state-of-the-art CNC machining centers ensure precision tolerances, while our quality control team verifies every batch meets international standards.
Contact us today for a quote on your stainless steel flange requirements. We stock extensive inventory and can accommodate custom specifications for specialized applications.
WhatsApp: +86-18658777855
Email: 1007788887@qq.com
