SS Flange (304/316/316L)
High-Quality SS Flanges (304/316/316L) Manufacturer
As China's leading stainless steel flange manufacturer, SSM specializes in the R&D and production of 304, 316, and 316L flanges. We offer a complete size range from 1/2" to 60", with pressure ratings from 150LB to 2500LB, strictly complying with ASME B16.5, DIN, JIS and other international standards.
Detailed Product Specifications
1. Standard Size Range
Nominal Diameter: DN15-DN1500 (1/2"-60")
Pressure Ratings: PN6-PN100 (150LB-2500LB)
Flange Types:
Slip-On (SO)
Weld Neck (WN)
Socket Weld (SW)
Threaded (TH)
Blind (BL)
Lap Joint (LJ)
2. Material Comparison
| Material | 304 Stainless | 316 Stainless | 316L Stainless |
| Carbon Content | ≤0.08% | ≤0.08% | ≤0.03% |
| Nickel Content | 8-10.5% | 10-14% | 10-14% |
| Molybdenum Content | - | 2-3% | 2-3% |
| Temperature Range | -196°C~800°C | -196°C~800°C | -196°C~800°C |
3. Pressure Rating Chart
| Standard | 150LB | 300LB | 600LB | 900LB | 1500LB | 2500LB |
| PN | 6 | 10 | 25 | 40 | 64 | 100 |
| Nominal Pressure(MPa) | 1 | 2.5 | 4 | 6.3 | 10 | 16 |
Product Advantages
Precision Manufacturing:
CNC machining with dimensional accuracy of ±0.05mm
Sealing surface roughness Ra≤3.2μm
Flange thickness tolerance controlled within ±1mm
Stringent Testing Standards:
100% dimensional inspection
Material spectrometric analysis
Hydrostatic testing (1.5x working pressure)
Magnetic particle/liquid penetrant testing
Surface Treatment:
Pickling and passivation
Mechanical polishing (up to #600 grit)
Electro-polishing (optional)
Typical Applications
Petrochemical Industry:
Media: Crude oil, natural gas, acid/alkali solutions
Recommended material: 316L (sulfide corrosion resistant)
Typical specification: DN300 PN40 WN flange
Food & Pharmaceutical:
Media: Purified water, dairy products, pharmaceuticals
Recommended material: 316 mirror polish
Typical specification: DN100 PN10 SO flange
Marine Engineering:
Environment: Seawater, high salt spray
Recommended material: 316L ultra-low carbon
Typical specification: DN500 PN16 WN flange
Customization Capabilities
Non-standard flange machining:
Oversized dimensions (up to DN3000)
Special sealing face types (RJ, FF, etc.)
Special-shaped flange design
Special requirements:
Low-temperature impact testing
NACE MR0175 compliance
Third-party certifications (TUV, CE, etc.)
We provide complete technical support including:
Flange selection guidance
Installation instructions
Welding process recommendations
Maintenance solutions
For detailed product catalog and technical parameters, please contact our sales engineers. SSM is committed to providing the most suitable stainless steel flange solutions for your operational requirements.
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