Flanges
What are Flanges?
Flanges are mechanical components used to connect pipes, valves, pumps, and other equipment within piping systems. They provide easy access for cleaning, inspection, modification, or maintenance without dismantling the system entirely. Typically joined using bolts and gaskets, flanges ensure a secure, pressure-tight, and leak-proof seal.
Asiad Steel Industries is a leading manufacturer, supplier, and exporter of high-quality flanges in various pressure classes, sizes, and materials for diverse industrial applications.
We offer a complete range of stainless steel, carbon steel, alloy steel, and special alloy flanges that conform to global standards like ANSI, ASME, DIN, and EN.
Key Features
- Leak-Proof Jointing – Enables secure connections between pipes and components
- Durable Construction – Available in forged and rolled ring types for strength
- Easy Installation & Removal – Bolted design allows simple assembly/disassembly
- Corrosion Resistance – Offered with anti-corrosive coatings and in corrosion-proof alloys
- Wide Compatibility – Available in raised face (RF), ring type joint (RTJ), flat face (FF), and custom types
Types of Flanges
- Slip-On Flanges
- Socket Weld Flanges
- Blind Flanges
- Weld Neck Flanges
- Threaded Flanges
- Lap Joint Flanges
- ASA 150# Flanges
- ASA 300# Flanges
- Table D Flanges
- Table E Flanges
- Table F Flanges
- Table H Flanges
Specifications
Mechanical Properties
Chemical Composition
Equivalent Grades
Weight Chart
Specifications
| Parameter | Details |
|---|---|
| Size Range | ½” to 48” (DN15 – DN1200) |
| Pressure Ratings | Class 150 to Class 2500 / PN6 to PN64 |
| Flange Face Types | RF, FF, RTJ, Tongue & Groove, Male-Female |
| Connection Types | Welded, Threaded, Lap Joint, Slip-On, Blind |
| Material Options | SS 304/316, CS A105, Alloy Steel, Duplex, Inconel |
| Standards | ASME B16.5 / B16.47, DIN EN 1092-1, BS 4504 |
| Coating | Rust preventive, Black oxide, Hot-dip galvanized |
| Property | Value |
|---|---|
| Tensile Strength | 485 – 700 MPa |
| Yield Strength | 205 – 450 MPa |
| Elongation | 20% – 35% |
| Hardness | 110 – 220 HB (Material dependent) |
| Max Working Temp | -46°C to +600°C (depending on material) |
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 – 0.25 |
| Manganese (Mn) | 0.50 – 1.70 |
| Silicon (Si) | 0.15 – 0.60 |
| Chromium (Cr) | 17.0 – 20.0 (for SS grades) |
| Nickel (Ni) | 8.0 – 11.0 (SS only) |
| Molybdenum (Mo) | 2.0 – 3.0 (for 316/Alloys) |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.030 |
| Standard | Equivalent Grade |
|---|---|
| ASTM | A105, A182 F304/F316, A350 LF2 |
| ASME | B16.5, B16.47 |
| DIN | 1.4301, 1.4401, 1.4571 |
| EN | X5CrNi18-10, X2CrNiMo17-12-2 |
| Flange Type | Size (Inch) | Weight (kg/piece) |
|---|---|---|
| Weld Neck Flange | 2″ | 4.6 |
| Slip-On Flange | 4″ | 9.8 |
| Blind Flange | 6″ | 18.5 |
| Threaded Flange | 1″ | 2.2 |
| Lap Joint Flange | 3″ | 6.5 |
| Socket Weld Flange | 1½” | 3.1 |
Applications of Flanges
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What type of flange is best for high-pressure applications?
Weld Neck and RTJ flanges are best suited for high-pressure and high-temperature systems.
Do you supply customized flange sizes or drilling?
Yes, Asiad Steel Industries provides custom flange solutions, including non-standard sizes, facing types, and hole drilling patterns.
Are stainless steel flanges suitable for corrosive media?
Absolutely. SS 304/316 flanges offer excellent corrosion resistance for harsh environments.
Can I mix flange classes in a piping system?
It is not recommended. Always match flange class and pressure rating to maintain integrity and performance.
