Introduction
Flanges are essential components in piping systems, enabling secure connections between pipes, valves, and other equipment. Among the various flange materials, ASTM A105 carbon steel flanges stand out as a preferred choice for high-temperature and high-pressure applications due to their strength, durability, and cost-effectiveness.
At Mcneil Instrument, we are a trusted manufacturer, supplier, and exporter of ASTM A105 flanges in India, serving industries across oil & gas, petrochemicals, power generation, and chemical processing. Our flanges are designed to meet global standards and deliver reliable performance in critical systems.
What is ASTM A105 and Why is it Preferred?
The ASTM A105 specification covers carbon steel forgings for piping components, including flanges, fittings, and valves. It is specifically designed for ambient and high-temperature services.
Key Benefits of ASTM A105 Flanges
- High Strength: Suitable for high-pressure and high-temperature environments.
- Excellent Weldability: Easily welded without the need for extensive preheating.
- Versatile Applications: Commonly used in oil, gas, and power industries.
- Cost-Effective: Offers a strong performance-to-price ratio compared to stainless or alloy steel flanges.
Types of ASTM A105 Flanges
ASTM A105 flanges are available in various types to suit diverse industrial needs:
- Weld Neck Flanges – For high-pressure pipelines with superior stress distribution.
- Slip-On Flanges – Economical and easy to install in low-to-moderate pressure applications.
- Blind Flanges – Used to close the ends of pipes or pressure vessels.
- Socket Weld Flanges – Ideal for small-diameter, high-pressure systems.
- Threaded Flanges – For pipelines where welding is not possible.
- Lap Joint Flanges – Suitable for systems requiring frequent disassembly.
Technical Specifications of ASTM A105 Flanges
| Specification | Details |
| Standard | ASTM A105 / ASME SA105 |
| Material | Carbon Steel |
| Size Range | ½” to 48” (DN 15 to DN 1200) |
| Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Face Types | RF, FF, RTJ |
| Compliance Standards | ANSI, ASME, DIN, EN, JIS, BS |
Mechanical Properties of ASTM A105 Flanges
| Property | Value |
| Tensile Strength | ≥ 485 MPa |
| Yield Strength | ≥ 250 MPa |
| Elongation | ≥ 22% |
| Hardness | 187 HB Max |
Certifications
Mcneil Instrument ensures that every ASTM A105 flange is fully certified and meets international standards:
- ASTM A105 material compliance
- ASME B16.5 / B16.47 dimensional standards
- EN 10204 3.1 / 3.2 Mill Test Certificates
- ISO 9001:2015 certified processes
- IBR (Indian Boiler Regulations) approval
- NACE MR0175/MR0103 for sour service
Available Sizes & Specifications
| Type | Size Range | Pressure Class |
| Weld Neck Flanges | ½” to 48” | 150# – 2500# |
| Blind Flanges | ½” to 48” | 150# – 2500# |
| Slip-On Flanges | ½” to 24” | 150# – 600# |
| Socket Weld Flanges | ½” to 4” | 150# – 900# |
| Threaded Flanges | ½” to 4” | 150# – 600# |
| Lap Joint Flanges | ½” to 24” | 150# – 600# |
Global Reach of Mcneil Instrument: ASTM A105 Flanges
Our ASTM A105 flanges are exported to multiple regions, delivering consistent performance across industries:
- In Saudi Arabia and UAE, used in oil & gas refineries and petrochemical plants.
- In Qatar and Oman, integrated into high-pressure steam lines and power plants.
- In Nigeria and Ghana, it supplied for infrastructure and industrial projects.
- In USA (Texas and Chicago), it is used in refinery systems and chemical processing units.
- In Malaysia and Singapore, applied in large-scale industrial piping systems.
- Across Brazil, supporting heavy-duty engineering and power projects.
Conclusion
ASTM A105 flanges provide the ideal balance of strength, reliability, and cost-efficiency for a wide range of industrial applications. Their excellent mechanical properties make them the preferred choice for high-pressure and high-temperature systems worldwide.
As a leading manufacturer, supplier, and exporter of ASTM A105 flanges in India, Mcneil Instrument ensures each product is manufactured to the highest standards, thoroughly tested, and delivered with complete certifications to meet global demands.
