Carbon Steel Fittings
Carbon Steel Fittings are essential components used in piping systems to connect straight pipe sections, adapt to different sizes or shapes, and regulate fluid flow. Manufactured from carbon steel, these fittings offer excellent strength, durability, and resistance to high pressure and temperature, making them ideal for use in industrial applications such as oil and gas, petrochemical, power plants, and water treatment. Common types of carbon steel fittings include elbows, tees, reducers, couplings, and flanges, each designed to facilitate smooth directional changes, branching, or diameter transitions in piping systems. They comply with international standards such as ASTM A234, ASME B16.9, and MSS-SP-75 to ensure reliable mechanical properties and chemical composition. Carbon steel fittings are favored for their weldability and cost-effectiveness, delivering long-term performance in demanding environments.
Carbon Steel Fittings - Specifications
| Parameter | Description / Options |
|---|---|
| Standards | ASTM A234, ASTM A403, ASME B16.9, ASME B16.28, ASME B16.11, MSS-SP-75, EN 10253, API 5L |
| Material Grades | ASTM A105, ASTM A234 WPB, ASTM A420 WPL6, ASTM A182 F1, F5, F11, F22, F91 |
| Types | Elbows (90°, 45°, 180°), Tees (Equal & Reducing), Reducers (Concentric & Eccentric), Couplings, Caps, Crosses, Flanges |
| Size Range | 1/8" to 48" (6 mm to 1219 mm) |
| Pressure Class | Class 150, 300, 600, 900, 1500, 2500 (ASME B16.5) |
| Connection Type | Butt Weld, Socket Weld, Threaded (NPT, BSP) |
| Wall Thickness | Schedule 5S, 10S, 40S, 80S, XXS (per ASME B36.10 / B36.19) |
| End Finish | Beveled, Plain, Threaded, Socket Weld |
| Testing | Hydrostatic Test, Radiography (RT), Ultrasonic Test (UT), Positive Material Identification (PMI) |
| Certification | EN 10204 3.1 / 3.2 Mill Test Certificate (MTC) |
| Applications | Oil & Gas, Petrochemical, Power Plants, Water Treatment, Chemical Processing |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| ASTM A105 | 485 - 620 | 250 - 415 | 22 - 30 | 140 - 180 |
| ASTM A234 WPB | 485 - 620 | 250 - 415 | 22 - 30 | 140 - 180 |
| ASTM A420 WPL6 | 450 - 580 | 240 - 370 | 25 - 30 | 140 - 170 |
| ASTM A182 F1 | 415 - 585 | 205 - 345 | 25 - 35 | 120 - 160 |
| ASTM A182 F5 | 585 - 830 | 415 - 620 | 20 - 25 | 180 - 230 |
| ASTM A182 F11 | 550 - 760 | 380 - 620 | 20 - 25 | 180 - 230 |
| ASTM A182 F22 | 585 - 830 | 415 - 620 | 20 - 25 | 180 - 230 |
| ASTM A182 F91 | 700 - 930 | 460 - 700 | 15 - 20 | 220 - 280 |
Chemical Composition
| Grade | C (max) | Mn (%) | Si (%) | P (max) | S (max) | Cr (%) | Mo (%) | Ni (%) | V (%) | Other Elements |
|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A105 | 0.35 | 0.60-1.05 | 0.10-0.35 | 0.035 | 0.040 | — | — | — | — | — |
| ASTM A234 WPB | 0.30 | 0.40-1.00 | 0.10-0.40 | 0.035 | 0.040 | — | — | — | — | — |
| ASTM A420 WPL6 | 0.30 | 0.40-1.10 | 0.10-0.35 | 0.035 | 0.040 | — | — | — | — | — |
| ASTM A182 F1 | 0.20 | 0.30-0.60 | 0.10-0.40 | 0.035 | 0.040 | — | — | — | — | — |
| ASTM A182 F5 | 0.12 | 0.30-0.60 | 0.10-0.40 | 0.025 | 0.035 | 4.0-5.0 | 0.50-0.80 | — | — | — |
| ASTM A182 F11 | 0.10 | 0.30-0.60 | 0.10-0.40 | 0.030 | 0.035 | 8.0-9.5 | 0.44-0.65 | — | — | — |
| ASTM A182 F22 | 0.08 | 0.30-0.60 | 0.10-0.40 | 0.030 | 0.035 | 1.90-2.60 | 0.44-0.65 | — | — | — |
| ASTM A182 F91 | 0.10 | 0.30-0.60 | 0.20-0.50 | 0.020 | 0.010 | 8.0-9.5 | 0.80-1.10 | 0.20-0.50 | 0.18-0.25 | Nb + Ta (0.05-0.15) |