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ASME B16.5 F310S Stainless Steel Forged Flange Socket Weld Flange Class 150 RF
Product Overview
The ASME B16.5 F310S Socket Weld Flange Class 150 RF is designed for small-diameter, high-pressure piping systems, offering superior performance in demanding industrial applications.
What is Socket Weld Flanges?
Socket Weld Flanges feature a unique connection method where the pipe end inserts into the flange socket and is welded externally. This design ensures:
- Smooth internal pipeline transition with minimal flow resistance
- Easier welding and alignment compared to butt welding
- Ideal for small-bore, high-pressure systems
- Note: Requires careful consideration for highly corrosive media due to potential gap between pipe and socket
Product Specifications
| Product Name |
Forged Socket Weld Flange |
| Material |
Stainless Steel F310S / UNS S31008 |
| Standard |
ASME B16.5 / ASTM A182 |
| Flange Type |
Socket Weld (SW) |
| Size Range |
≤80" (Full range of small-bore sizes available) |
| Pressure Rating |
Class 150 |
| Facing Type |
Raised Face (RF) |
| Applications |
High-Temperature Furnace Piping, Thermal Processing Equipment |
F310S Material Properties
F310S is a high chromium, medium nickel austenitic stainless steel engineered for extreme temperature conditions:
- Excellent oxidation resistance up to 1093°C (2000°F)
- Superior high-temperature strength and creep resistance
- Minimal oxide skin formation
- Ideal for industrial furnaces, heat treatment equipment, and thermal cycling applications
F310S Chemical & Mechanical Properties
Chemical Composition (wt %), ASTM A182:
| Carbon (C) |
0.08 max |
| Manganese (Mn) |
2.00 max |
| Silicon (Si) |
1.50 max |
| Chromium (Cr) |
24.0 - 26.0 |
| Nickel (Ni) |
19.0 - 22.0 |
Mechanical Properties (Minimum), ASTM A182:
| Tensile Strength |
515 MPa (75 ksi) |
| Yield Strength |
205 MPa (30 ksi) |
| Elongation |
30% |
| Hardness |
217 HBW max |
Why Choose SMLSCO?
SMLSCO flange manufacturing base - Wenzhou Yongheng Steel Industry is your trusted flange manufacturer and stockist:
- Established in 2018 with 5000 square meter facility
- 38 advanced equipment including CNC lathes
- 350 tons monthly production capacity
- Strict compliance with ISO, PED, and NORSOK M650 standards
- Industrial-grade precision and reliability for global customers
Flange Facing Types
The Raised Face (RF) sealing surface concentrates bolt preload force for reliable sealing. SMLSCO offers multiple sealing surface options:
- Raised Face (RF) - Standard for most applications
- Full Face (FF) - Ideal for low-pressure conditions
- Ring Type Joint (RTJ) - Designed for ultra-high pressure applications