Introduction
In modern industries, flanges are critical components that ensure secure connections between pipes, valves, and equipment. Among the many standards available, ASTM A240 flanges stand out for their durability, corrosion resistance, and adaptability across industries.
At Mcneil Instruments, we are a trusted manufacturer, supplier, and exporter of ASTM A240 stainless steel flanges in India, providing products that meet stringent global standards for high-performance piping systems.
What Is ASTM A240?
The ASTM A240 specification covers chromium and chromium-nickel stainless steel plate, sheet, and strip, which are widely used for pressure vessels and general applications. When fabricated into flanges, ASTM A240 material delivers:
- Superior Corrosion Resistance – Ideal for harsh industrial and marine environments.
- High Strength – Reliable in high-pressure and high-temperature systems.
- Versatility – Available in multiple grades such as 304, 304L, 316, 316L, 321, 347, and more.
- Excellent Weldability & Formability – Ensures ease of installation and long service life.
Types of ASTM A240 Flanges
Mcneil Instruments manufactures a comprehensive range of flanges in compliance with ASTM A240, including:
- Weld Neck Flanges – For high-pressure and high-temperature applications.
- Slip-On Flanges – Easy to install, ideal for low-pressure systems.
- Blind Flanges – Used to block off pipelines, valves, or pumps.
- Socket Weld Flanges – Suitable for small-diameter, high-pressure piping.
- Lap Joint Flanges – Cost-effective, used with stub ends.
- Threaded Flanges – No welding required, perfect for quick assembly.
Technical Specifications of ASTM A240 Flanges
| Specification | Details |
| Standard | ASTM A240 / ASME SA240 |
| Grades Available | 304, 304L, 316, 316L, 321, 347, 904L, Duplex & Super Duplex |
| Size Range | ½” to 48” (DN 15 to DN 1200) |
| Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Manufacturing Method | Forged / Plate / Cast |
| Face Types | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
| Standards Compliance | ANSI / ASME / DIN / EN / JIS / BS |
Mechanical Properties of ASTM A240 Flanges
| Property | Value (Typical for SS 304/316) |
| Tensile Strength | 515 – 620 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 90 HRB |
| Operating Temperature | Up to 870°C (depending on grade) |
Certifications of ASTM A240 Flanges
| Certification | Details |
| ASTM A240 Compliance | Raw material and manufacturing |
| ASME B16.5 / B16.47 | Dimensional accuracy |
| EN 10204 3.1 / 3.2 | Mill Test Certificates |
| ISO 9001:2015 | Quality Management |
| IBR Certification | Boiler suitability |
| NACE MR0175 / MR0103 | Sour service resistance |
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 Instruments: ASTM A240 Flanges
Mcneil Instruments has built a strong reputation as a global supplier of ASTM A240 stainless steel flanges, serving industries across the world:
- In Saudi Arabia and Qatar, we are trusted manufacturers of stainless steel flanges for oil & gas and petrochemical plants.
- In Nigeria and Ghana, we supply corrosion-resistant ASTM A240 flanges for water treatment and energy projects.
- In Texas and Chicago, we are recognized exporters delivering precision-engineered flanges to refineries and power plants.
- In Malaysia and Singapore, our ASTM A240 flanges support marine engineering, chemical processing, and infrastructure projects.
- Across Brazil, Mcneil serves as a reliable supplier of stainless steel flanges for pulp & paper mills, sugar refineries, and heavy industry.
Conclusion
ASTM A240 flanges play a vital role in ensuring safe, leak-proof, and durable connections in industrial piping systems. Whether it is oil & gas, petrochemicals, pharmaceuticals, or marine engineering, Mcneil Instruments provides high-quality stainless steel flanges designed to perform under the toughest conditions.
With global certifications, a wide product range, and a strong international supply network, Mcneil Instruments stands as a trusted manufacturer, supplier, and exporter of ASTM A240 flanges in India.
Partner with us today for reliable, certified, and globally trusted stainless steel flange solutions.
