SS Socket Weld Flanges (SWFR)
Raj Metals is a premier manufacturer and supplier of Stainless Steel Socket Weld Flanges (SWFR), specifically engineered for small-diameter, high-pressure piping applications. These flanges feature a precision-machined internal socket and a shoulder that acts as a guide for pipe depth, ensuring a smooth bore and optimized fluid flow with minimal turbulence. Unlike slip-on flanges, our socket weld flanges provide a superior, high-strength connection that is exceptionally resistant to fatigue. Precision-forged from -grade stainless steel—such as 304L and 316L—our SWFR flanges are the industry standard for chemical processing, steam lines, hydraulic control systems, and critical industrial piping where durability and leak-proof performance are paramount.
Key Features of Our SS Socket Weld Flanges
✓ Precision-Machined Internal Bore for Optimized Fluid Flow
✓ Exceptional Fatigue Resistance & Long-Term Mechanical Durability
✓ Simplified Installation (No Pipe End Beveling Required)
✓ Robust Construction Ideal for High-Pressure Small-Bore Piping
Product Specifications
| Parameter |
Details |
| Product Form |
SS Socket Weld Raised Face (SWRF) / Flat Face (SWFF) |
| Size Range |
1/2" NB to 4" NB (Standard small-bore application) |
| Pressure Class |
Class 150# to 2500# | PN10 to PN160 |
| Face Type |
Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Manufacturing Process |
Precision Forged & CNC Machined |
| Surface Finish |
Pickled, Bright Polished, or Standard Industrial Mill Finish |
| Standard Compliance |
ANSI/ASME B16.5, DIN, EN 1092-1 |
| Welding Connection |
Single Fillet Weld on the External Hub |
| Quality & Certification |
PMI, Ultrasonic (UT), Hydrostatic, MTC per EN 10204 3.1 |
Precision Socket Weld Flanges Size Chart
| Nominal Size |
Pressure Class |
Facing |
Recommended Use |
| 1/2" - 1" |
150# - 1500# |
RF / FF |
Instrumentation & high-pressure small lines |
| 1-1/4" - 2" |
150# - 2500# |
RF / FF / RTJ |
Hydraulic systems, chemical process lines |
| 2-1/2" - 4" |
150# - 600# |
RF / RTJ |
Steam lines & critical utility piping |
| Custom Requirement |
Custom SS grades (304L, 316L, 316Ti) and special requirements available upon request. |
Industry Applications
High-Pressure Steam Lines
Chemical Processing Systems
Hydraulic & Control Piping
Flammable Gas Distribution
