Stainless Steel Flange
Stainless Steel Flange
Manufacturer, Supplier & Exporter
Emirerri Steel is a trusted manufacturer, supplier, and exporter of Stainless Steel Flanges that meet international standards such as ASME, ANSI, DIN, EN, and BS. Our precision-engineered flanges ensure superior performance, durability, and leak-proof connections across diverse piping systems and industries including petrochemical, oil & gas, shipbuilding, water treatment, and power generation.
We offer stainless steel flanges in a wide range of types, materials, pressure ratings, and sizes, suitable for both standard and customized applications.
Types of Stainless Steel Flanges
1. Threaded Flanges
Threaded flanges (Screwed flanges) are designed with threads inside the flange bore that fit on the external thread of a pipe. They are ideal for small-diameter, high-pressure applications where welding is not feasible.
Applications: Cooling water lines, fire protection systems, and air & water services.
2. Socket Weld Flanges
Socket-weld flanges are used for small-diameter, high-pressure pipes. The pipe is inserted into the socket end and fillet welded, creating a smooth bore and better flow characteristics.
Applications: Hydraulic lines, chemical processing units, and compact piping systems.
3. Slip-On Flanges
Slip-on flanges are easy to install and weld onto the pipe. They have a low hub and are suitable for low-pressure applications where quick assembly is needed.
Applications: Low-pressure pipelines, water lines, and gas pipelines.
4. Lap Joint Flanges
Lap joint flanges are used with stub ends and are ideal for systems that require frequent dismantling and inspection. They allow easy alignment of bolt holes and reduce overall maintenance cost.
Applications: Food, pharmaceutical, and chemical industries.
5. Weld Neck Flanges
Weld neck flanges are designed for high-pressure and high-temperature applications. They have a long tapered hub that provides reinforcement and ensures smooth stress distribution.
Applications: Refineries, thermal power plants, and chemical processing systems.
6. Blind Flanges
Blind flanges are solid discs used to close the end of a piping system or a pressure vessel opening. They can handle high-pressure conditions and allow easy access for inspection or maintenance.
Applications: Pressure vessel openings, storage tanks, and process systems.
7. Reducing Flange
Reducing flanges are used to connect pipes of different diameters. They maintain smooth fluid flow and are available in various pressure ratings and materials.
Applications: Pipeline modifications, flow control systems, and process equipment.
8. Expander Flange
Expander flanges are similar to weld neck flanges but have a larger bore on one end, allowing connection of a larger diameter pipe. They serve as a cost-effective alternative to using separate reducers.
Applications: Pump and compressor connections, process piping systems.
9. Flangeolet / Weldoflange / Nippoflange
These are special flanges that serve as branch connections from a main pipe. They combine the features of a weld neck flange and an olet, ensuring strong and leak-proof branch connections.
Applications: Piping manifolds, high-pressure lines, and chemical processing units.
Available Stainless Steel Flange Materials
Duplex & Super
ASTM A182 F53 / UNS S32750 (Super Duplex 2507)
ASTM A182 F55 / UNS S32760 (Zeron 100)
Ferritic Stainless Steel Grades
- ASTM A182 F405
- ASTM A182 F430
- ASTM A182 F446
Martensitic Stainless
- ASTM A182 F410
- ASTM A182 F420
- ASTM A182 F440
Precipitation Hardening
- 17-4 PH (UNS S17400)
Special Alloys
254 SMO (UNS S31254)
Alloy 20 (UNS N08020)
Titanium-Stabilized Grades .
Flange Ratings / Pressure Classes
Our stainless steel flanges are available in multiple pressure ratings and classes:
ASME/ANSI B16.5 Formula
PT = (Pr x SI) / 8750
- PT = rated working pressure in psig for specified material at temperature T.
- Pr = Pressure rating as per Class in Psig.
- SI = Selected stress in Psig for specified material at Temperature T.
- Refer to ASME B16.5 Annex B for the detailed calculation of Pressure Ratings.
| Flanges pressure rating in psig for common carbon steel ASME flanges | |||||||
| ( A105 / A350 LF2 / A350 LF3 / A350 LF6) | |||||||
| Temperature (F°) | 150# | 300# | 400# | 600# | 900# | 1500# | 2500# |
| -20 to 100 | 285 | 740 | 985 | 1480 | 2220 | 3705 | 6170 |
| 200 | 260 | 680 | 905 | 1360 | 2035 | 3395 | 5655 |
| 300 | 230 | 655 | 870 | 1310 | 1965 | 3270 | 5450 |
| 400 | 200 | 635 | 845 | 1265 | 1900 | 3170 | 5280 |
| 500 | 170 | 605 | 805 | 1205 | 1810 | 3015 | 5025 |
| 600 | 140 | 570 | 755 | 1135 | 1705 | 2840 | 4730 |
| 650 | 125 | 550 | 730 | 1100 | 1650 | 2745 | 4575 |
| 700 | 110 | 530 | 710 | 1060 | 1590 | 2655 | 4425 |
| 750 | 95 | 505 | 675 | 1015 | 1520 | 2535 | 4230 |
| 800 | 80 | 410 | 550 | 825 | 1235 | 2055 | 3430 |
| 850 | 65 | 320 | 425 | 640 | 955 | 1595 | 2655 |
| 900 | 50 | 230 | 305 | 460 | 690 | 1150 | 1915 |
| 950 | 35 | 135 | 185 | 275 | 410 | 685 | 1145 |
| 1000 | 20 | 85 | 115 | 170 | 255 | 430 | 715 |
Flange Sizes
Nominal Pipe Size (NPS): ½” to 48”
DN Size Range: DN15 to DN1200
Thickness: Schedule 10 to Schedule XXS (or as per client requirement)
Key Features
Corrosion and oxidation resistance
Leak-proof and durable construction
Easy installation and maintenance
Suitable for high pressure and temperature
Available in custom sizes and surface finishes
Applications
Oil & Gas Pipelines
Petrochemical Industries
Power Generation Plants
Water Treatment Systems
Marine & Offshore Applications
Food & Pharmaceutical Industries