Carbon Steel Flanges are crucial components used to connect pipes, valves, pumps, and other equipment in piping systems, providing easy access for inspection, cleaning, and modification. Made primarily from carbon steel, these flanges offer excellent strength, durability, and resistance to wear and corrosion in various industrial environments such as oil and gas, petrochemical, and power plants. They are available in several types including weld neck, slip-on, blind, threaded, and lap joint flanges, each designed for specific applications and pressure ratings. Carbon steel flanges conform to industry standards such as ASME B16.5, ASTM A105, and API specifications, ensuring consistent quality and performance under high-pressure and high-temperature conditions. Their versatility and cost-effectiveness make them a preferred choice for many pipeline and process system installations.
| Parameter | Description / Options |
|---|---|
| Standards | ASME B16.5, ASME B16.47, ASTM A105, ASTM A182, API 6A, EN 1092-1 |
| Materials / Grades | ASTM A105, ASTM A350 LF2, ASTM A182 F1, F5, F11, F22, F91; Carbon Steel Grades: A105, A350 LF2 |
| Types | Weld Neck, Slip-On, Blind, Threaded, Lap Joint, Socket Weld |
| Pressure Ratings | 150#, 300#, 400#, 600#, 900#, 1500#, 2500# (as per ASME B16.5) |
| Size Range | 1/2″ to 72″ (12.7 mm to 1829 mm) |
| Facing Types | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue and Groove (T&G) |
| Dimensions | As per ASME B16.5 and ASME B16.47 standards |
| Surface Finish | Machined, Smooth, Painted, Galvanized (optional) |
| Testing | Hydrostatic Test, Ultrasonic Test, Magnetic Particle Inspection, Positive Material Identification (PMI) |
| Applications | Oil & Gas, Petrochemical, Power Plants, Water Treatment, Chemical Processing |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| ASTM A105 | 485 – 620 | 205 – 350 | 23 – 30 | 150 – 200 |
| ASTM A350 LF2 | 415 – 585 | 205 – 350 | 23 – 35 | 130 – 180 |
| ASTM A182 F1 (Low Carbon Steel) | 415 – 550 | 205 – 350 | 25 – 35 | 130 – 180 |
| ASTM A182 F5 (Chromium-Molybdenum Steel) | 550 – 690 | 310 – 480 | 20 – 30 | 150 – 210 |
| ASTM A182 F11 | 550 – 690 | 310 – 480 | 20 – 30 | 160 – 210 |
| ASTM A182 F22 | 580 – 720 | 415 – 550 | 20 – 30 | 180 – 230 |
| ASTM A182 F91 | 620 – 750 | 450 – 620 | 15 – 25 | 200 – 250 |
| Grade | C (max %) | Mn (%) | Si (%) | P (max %) | S (max %) | Cr (%) | Mo (%) | Ni (%) |
|---|---|---|---|---|---|---|---|---|
| ASTM A105 | 0.35 | 0.60 – 1.05 | 0.10 – 0.35 | 0.035 | 0.035 | — | — | — |
| ASTM A350 LF2 | 0.20 – 0.50 | 0.30 – 0.80 | 0.10 – 0.40 | 0.035 | 0.035 | — | — | — |
| ASTM A182 F1 | 0.20 max | 0.30 – 0.80 | 0.10 – 0.35 | 0.035 | 0.035 | — | — | — |
| ASTM A182 F5 | 0.10 max | 0.40 – 0.70 | 0.20 – 0.50 | 0.025 | 0.030 | 0.50 – 1.00 | 0.45 – 0.65 | — |
| ASTM A182 F11 | 0.10 max | 0.40 – 0.70 | 0.20 – 0.50 | 0.025 | 0.030 | 0.90 – 1.20 | 0.45 – 0.65 | — |
| ASTM A182 F22 | 0.10 max | 0.30 – 0.60 | 0.10 – 0.50 | 0.025 | 0.030 | 1.90 – 2.30 | 0.40 – 0.60 | — |
| ASTM A182 F91 | 0.08 max | 0.30 – 0.60 | 0.20 – 0.50 | 0.020 | 0.030 | 8.00 – 9.50 | 0.80 – 1.10 | 0.20 – 0.50 |
