At Piyush Steel, we ASTM A105 carbon steel flanges , widely recognized for their high strength, durability, and excellent pressure resistance. A1050 flanges are utilized in sectors where dependable pipe connections are essential, including shipbuilding, petrochemicals, oil and gas, and power plants. Our A105 forged steel flanges are manufactured in accordance with DIN, ASTM, and SA105 specifications. We build them to withstand high pressures and temperatures, guaranteeing their performance under trying circumstances.
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The ASTM A105 carbon steel composition contains silicon, phosphorus, sulfur, and manganese, which improves its mechanical strength and resilience to deterioration. Due to their yield strength of 250 MPa and minimum tensile strength of 485 MPa, these flanges are appropriate for heavy-load and high-stress applications. Because ASTM A105 flanges have superior machinability, weldability, and durability, they are often utilized in industrial pipe systems. Oil and gas, petrochemical, power generation, and other demanding industries commonly use CS ASTM A105 flanges, which are equivalent to UNS K03504.
We offer a wide range of ASTM A105 flanges, including Weld Neck, Slip-On, Blind, Threaded, Socket Weld, Lap Joint, and Orifice Flanges, in sizes ranging from ½” to 48” NB. Carbon Steel A105 flanges have pressure classifications ranging from 150 to 2500 and are offered in raised face (RF), flat face (FF), and ring-type joint (RTJ) finishes. In order to meet certain industrial needs, we can also provide our A105 CS flanges with customized dimensions and surface treatments.
ASTM A105 carbon steel flanges are used a lot in steam pipes, pressure vessels, heat exchangers, refinery plants, and hydraulic systems because they can handle changing temperatures and being hit hard. Their ability to perform efficiently in both ambient and high-temperature applications makes them a cost-effective and long-lasting solution for critical operations.
As a trusted carbon steel ASTM A105 flanges manufacturer and supplier, Piyush Steel guarantees superior quality, competitive pricing, and timely global delivery. Whether you need bulk orders, specialized grades, or custom machining, we provide tailor-made solutions to meet your project needs. Get in touch with us today to find the right ASTM A105 flanges for your application!
Pipe Specification : ASTM A105 / A350 LF2, ASTM A694 - F42, F46, F52, F60, F65, F70, A36, A516 Gr. 70,60
Dimension Standard : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Standard : ASTM, ASME Flanges, ANSI Flanges, DIN Flanges, EN Flanges, BS Flanges etc
Size : 1/2"NB TO 48 "NB
Class / Pressure : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS DIN Standard ND 6,10, 16, 25, 40
| Flange Type | Nominal Pipe Size (NPS) | Outside Diameter (OD) (mm) | Bolt Circle Diameter (BCD) (mm) | Number of Bolts | Bolt Hole Diameter (mm) | Thickness (mm) | Pressure Rating |
| Slip-On Flange | 1/2" | 90 | 60 | 4 | 15 | 11 | 150# |
| Slip-On Flange | 1" | 120 | 90 | 4 | 18 | 14 | 150# |
| Weld Neck Flange | 2" | 150 | 120 | 4 | 19 | 18 | 150# |
| Weld Neck Flange | 4" | 230 | 190 | 8 | 19 | 24 | 150# |
| Blind Flange | 6" | 280 | 240 | 8 | 22 | 26 | 150# |
| Blind Flange | 8" | 345 | 300 | 8 | 22 | 29 | 150# |
| Socket Weld Flange | 1/2" | 90 | 60 | 4 | 15 | 11 | 300# |
| Threaded Flange | 1" | 120 | 90 | 4 | 18 | 14 | 300# |
| Lap Joint Flange | 2" | 150 | 120 | 4 | 19 | 18 | 300# |
| Lap Joint Flange | 4" | 230 | 190 | 8 | 19 | 24 | 300# |
| Flange Type | Size (NPS) | Pressure Class | Price per Piece (INR) | Price per Piece (USD) |
| Slip-On Flange | 1/2" | 150# | ₹250 | $3.00 |
| Slip-On Flange | 2" | 150# | ₹550 | $6.50 |
| Weld Neck Flange | 3" | 150# | ₹900 | $11.00 |
| Weld Neck Flange | 6" | 300# | ₹3,500 | $42.00 |
| Blind Flange | 4" | 150# | ₹1,200 | $15.00 |
| Blind Flange | 8" | 300# | ₹5,000 | $60.00 |
| Socket Weld Flange | 1" | 600# | ₹1,800 | $22.00 |
| Threaded Flange | 1/2" | 150# | ₹400 | $5.00 |
| Lap Joint Flange | 2" | 150# | ₹750 | $9.00 |
| Lap Joint Flange | 6" | 300# | ₹3,800 | $45.00 |
The full identification of the flanges should be continuously marked down its whole length, including :

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With Mill And Third Party Test Certificate.
ASTM A105 Carbon Steel Flanges Price List
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