What is a Flange
A steel flange is a mechanical component used to connect pipes, valves, pumps, or other equipment in industrial systems. It is typically a flat, circular ring or collar with evenly spaced bolt holes around its perimeter. Flanges are designed to create a secure, leak-proof joint when bolted to a matching flange on another component. They are widely used in piping systems, pressure vessels, and structural applications to enable assembly, disassembly, and maintenance.
Types of Flanges
Weld Neck Flanges, Slip-On Flanges, Socket-Weld Flanges, Lap Joint Flanges, Blind Flanges, Threaded Flanges, Long Neck Welding Flanges, Orifice Flanges, Special Flanges, etc.
How are Flanges made
Flanges are manufactured using three main techniques: casting, cutting from rolled plate material, or forging.
Sizes and Materials of Our Flanges
| Nominal Size | DN15 to DN2000 (1/2″ to 80″ NPS) | |
| Pressure Class | PN20 to PN420 (Class150 to Class2500) | |
| Type | Weld neck, slip-on, socket-weld, lap joint, blind, threaded, long neck welding, orifice, special, etc. | |
| Material Grade | A/SA-105 | |
| A/SA-350 | LF1, LF2, LF3, LF5, LF6, LF9 | |
| A/SA-694 | F42, F46, F48, F50, F52, F56, F60, F65, F70 | |
| A/SA-182 | F1, F2, F5, F9, F91, F11, F12, F21, F22, F304, F309, F310, F316, F317, F321, F347, F44, F45, F51, F53, F55, F60, etc. | |
| B/SB-151 | C70600, C71500, C74500, C75200, C77000, C79200, etc. | |
| B/SB-564 | N010276, N06200, N06022, N02200, N04400, N06600, N08800, N08810, N08825, N10675, N10629, etc. | |
| B/SB-381 | F1, F3, F5, F7, F9, F11, F12, F21, F25, F30, F38, etc. | |
For other customized requirements, please contact us.
Why Choose Us
- 16 years of experience in this industry. We are experts.
- solutions for all your needs
- the highest product quality
- the low lead times
- excellent customer service
