- Materials: Stainless Steel 304, 304L, 316, 316L, 321, 2205,2507,904L
- Standards: ASTM A182, ASME B16.5, DIN, EN 1092-1, JIS
- Flange Types: Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint
- Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500
- Size Range: ½” to 60”
- Surface Finish: RF, FF, RTJ
- Manufacturing Process: Forged, Machined, Heat Treated
Stainless Steel Flange Manufacturer & Supplier | Industrial SS Pipe Flanges
Stainless steel flanges are essential pipe connection components used to connect pipes, valves, pumps, and other equipment in industrial piping systems. Known for their excellent corrosion resistance, strength, and durability, stainless steel flanges provide secure and leak-proof connections in demanding environments.
Manufactured from premium stainless steel grades such as 304, 304L, 316, 316L, 321, and duplex stainless steel, these flanges are widely used in industries including oil & gas, chemical processing, food processing, marine engineering, and power generation.
Key Features of Stainless Steel Flange
- Excellent corrosion and oxidation resistance
- High mechanical strength and durability
- Suitable for high-pressure and high-temperature applications
- Smooth surface finish for improved hygiene and performance
- Excellent weldability and fabrication characteristics
- Long service life with low maintenance requirements
Specifications
- Materials: Stainless Steel 304, 304L, 316, 316L, 321, Duplex, Super Duplex
- Standards: ASTM A182, ASME B16.5, DIN, EN 1092-1, JIS
- Flange Types: Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint
- Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500
- Size Range: ½” to 60”
- Surface Finish: RF, FF, RTJ
- Manufacturing Process: Forged, Machined, Heat Treated
Types of Stainless Steel Flanges
Weld Neck Flange
Designed for high-pressure applications with strong structural integrity.
Slip-On Flange
Easy to install and widely used in low-pressure systems.
Blind Flange
Used to seal the end of piping systems or pressure vessel openings.
Socket Weld Flange
Suitable for small-diameter, high-pressure piping systems.
Threaded Flange
Provides a threaded connection without welding.
Lap Joint Flange
Used with stub ends for systems requiring frequent dismantling.
Applications
Stainless steel flanges are widely used across multiple industries:
- Oil and Gas Industry
- Chemical Processing Plants
- Water Treatment Systems
- Food and Beverage Processing
- Marine and Offshore Engineering
- Pharmaceutical Industry
- Power Generation Plants
- Pulp and Paper Industry
Contact us now for a quotation
Email: sales@hengyimetal.com
WhatsApp: +86 19521258704
| Parameter | Details |
|---|---|
| Material Grades | Grade: 200 Series: 201,202 Duplex stainless steel :2205,2507,2906,330,660,630,631,17-4ph,17-7ph, S318039 904L,etc |
| Standards | ANSI B16.5, ASME B16.5, ASTM A182, API 6A |
| Pressure Classes | 150, 300, 600, 900, 1500, 2500 |
| Flange Types | Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint |
| Size Range | 1/2″ to 60″ (custom sizes available) |
| Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Surface Finish | Smooth machined, serrated, or custom |
Flange Types & Applications
| Flange Type | Description | Typical Applications |
|---|---|---|
| Weld Neck | Features a tapered hub for high-strength, high-pressure applications | High-pressure pipelines, refineries, power plants |
| Slip-On | Slides over pipe and welded both inside and outside | Low to medium pressure applications, general industrial |
| Blind | Solid flange used to close pipe ends or pressure vessels | Pipe termination, maintenance access points |
| Socket Weld | Pipe inserts into socket and welded | Small diameter, high-pressure systems |
| Threaded | Internal threads for connection without welding | Low pressure, non-critical applications |
| Lap Joint | Used with stub end for easy alignment | Systems requiring frequent disassembly |
| Material Supply: | ||||||||||||
ASTM/ASME | EN Grade | Chemical Component % | ||||||||||
C | Cr | Ni | Mn | P | S | Mo | Si | Cu | N | Other | ||
201 | ≤0.15 | 16.00-18.00 | 3.50-5.50 | 5.50－7.50 | ≤0.060 | ≤0.030 | – | ≤1.00 | – | ≤0.25 | – | |
301 | 1.4310 | ≤0.15 | 16.00-18.00 | 6.00-8.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.00 | – | 0.1 | – |
304 | 1.4301 | ≤0.08 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
304L | 1.4307 | ≤0.030 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
304H | 1.4948 | 0.04~0.10 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
309S | 1.4828 | ≤0.08 | 22.00-24.00 | 12.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
309H | 0.04~0.10 | 22.00-24.00 | 12.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – | |
310S | 1.4842 | ≤0.08 | 24.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.5 | – | – | – |
310H | 1.4821 | 0.04~0.10 | 24.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.5 | – | – | – |
316 | 1.4401 | ≤0.08 | 16.00-18.50 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | – |
316L | 1.4404 | ≤0.030 | 16.00-18.00 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | – |
316H | 0.04~0.10 | 16.00-18.00 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | 0.10-0.22 | – | |
316Ti | 1.4571 | ≤0.08 | 16.00-18.50 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | Ti5(C+N)~0.7 |
317L | 1.4438 | ≤0.03 | 18.00-20.00 | 11.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | 3.00-4.00 | ≤0.75 | – | 0.1 | – |
321 | 1.4541 | ≤0.08 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | 0.1 | Ti5(C+N)~0.7 |
321H | 1.494 | 0.04~0.10 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | 0.1 | Ti4(C+N)~0.7 |
347 | 1.4550 | ≤0.08 | 17.00-19.00 | 9.00-13.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | Nb≥10*C%-1.0 |
347H | 1.4942 | 0.04~0.10 | 17.00-19.00 | 9.00-13.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | Nb≥8*C%-1.0 |
409 | S40900 | ≤0.03 | 10.50-11.70 | 0.5 | ≤1.00 | ≤0.040 | ≤0.020 | – | ≤1.00 | – | 0.03 | Ti6(C+N)-0.5 Nb0.17 |
430 | S43000 | ≤0.12 | 16.00-18.00 | 0.75 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
436 | S43600 | ≤0.025 | 16.00-19.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75-1.0 | ≤1.00 | ≤0.025 | Nb+Ti:8(C+N)~0.80 | |
439 | S43035 | ≤0.030 | 17.50-18.50 | – | ≤1.00 | ≤0.040 | ≤0.015 | – | ≤1.00 | – | ≤0.030 | Ti+Nb:0.2+4C~0.75 |
441 | S44100 | ≤0.030 | 17.50-18.50 | – | ≤1.00 | ≤0.040 | ≤0.015 | – | ≤1.00 | – | ≤0.030 | Ti:0.1-0.6 Nb:3C+0.3~1.0 |
442 | S44200 | ≤0.025 | 18.0-23.0 | – | ≤1.00 | ≤0.040 | ≤0.035 | – | ≤1.00 | – | ||
443 | S44300 | ≤0.025 | 19.5-22.0 | – | ≤1.00 | ≤0.035 | ≤0.015 | – | ≤1.00 | – | ≤0.025 | Nb+Ti:0.2+4(C+N)~0.75 |
444 | S44400 | ≤0.025 | 17.00-20.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 1.75-2.5 | ≤1.00 | ≤0.035 | Ti+Nb:0.2+4(C+N)~0.8 | |
446 | S44600 | ≤0.2 | 23.0-27.0 | 0.75 | ≤1.50 | ≤0.040 | ≤0.030 | – | ≤1.00 | 0.25 | ||
410 | 1Cr13 | 0.08~0.15 | 11.50-13.50 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
410J1 | 1Cr13Mo | 0.08-0.18 | 11.50-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.30-0.60 | ≤1.00 | – | – | – |
420 | 2Cr13 | ≥0.15 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
420J2 | 3Cr13 | 0.26-0.35 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
4Cr13 | 0.36-0.45 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – | |
431 | 1Cr17Ni2 | ≤0.2 | 15.00-17.00 | 1.25-2.50 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
440C | 11Cr17 | 0.95-1.20 | 16.00-18.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75 | ≤1.00 | – | – | – |
17-4PH | 630/1.4542 | ≤0.07 | 15.50-17.50 | 3.00-5.00 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | 3.00-5.00 | – | Nb+Ta:0.15-0.45 |
17-7PH | 631 | ≤0.09 | 16.00-18.00 | 6.50-7.50 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | Al 0.75-1.50 |
