Titanium Grade 9 Long Weld Neck Flanges Class 150 ASME: Key Features, Applications, and Advantages
Titanium is a versatile and high-performance material, often chosen for its excellent strength-to-weight ratio, corrosion resistance, and ability to withstand high temperatures. In industries such as aerospace, marine, chemical processing, and power generation, Titanium Grade 9 is a popular choice due to its unique properties. The Class 150 ASME specification refers to the pressure rating of the flanges, making them suitable for systems requiring moderate pressure handling.
Here, we’ll explore the features, applications, and advantages of Titanium Grade 9 Long Weld Neck Flanges Class 150 ASME.
1. Titanium Grade 9 Overview
Titanium Grade 9, also known as Ti-3Al-2.5V, is an alloy consisting of titanium with 3% aluminum and 2.5% vanadium. It is one of the strongest commercially pure titanium alloys, offering a balance of strength, formability, and corrosion resistance. Compared to Grade 1 and Grade 2, Titanium Grade 9 has superior strength, making it ideal for applications where higher mechanical properties are required without sacrificing corrosion resistance.
2. Class 150 ASME Specification
Class 150 is a standard pressure rating defined by the ASME B16.5 specification for flanges. These flanges are rated for a maximum pressure of 150 psi at ambient temperature, though the pressure rating will decrease with temperature increases. The Class 150 ASME flanges are designed to be used in moderate pressure systems and are typically used in lower-pressure applications such as:
Low-pressure piping systems
Water and steam systems
Chemical processing systems
3. Design of Long Weld Neck Flanges
The Long Weld Neck Flange is designed with an extended neck that allows for the flange to be welded to the pipe over a greater length. This design provides several benefits:
Reduced Stress Concentration: The long neck helps distribute the stresses more evenly over the entire flange and pipe connection, making the system less prone to failures.
Alignment: The long neck helps align the flange properly with the pipeline, making welding easier and more secure.
Stronger Weld: The extended neck provides a larger welding area, contributing to a more robust and durable connection.
These flanges are ideal for systems where the connection is under higher mechanical stress and where alignment is essential.
4. Applications of Titanium Grade 9 Long Weld Neck Flanges Class 150
Titanium Grade 9 Long Weld Neck Flanges Class 150 are ideal for several critical industries where moderate pressure handling is required, and the materials must withstand corrosion and fatigue under tough conditions. Common applications include:
Aerospace: In aerospace systems, titanium alloys are often used for their strength and lightweight characteristics. Grade 9 flanges can be used in airframes, engines, and hydraulic systems where moderate pressure tolerance and high strength are needed.
Chemical Processing: Chemical plants often deal with corrosive fluids and require materials that can withstand aggressive chemicals. Titanium Grade 9’s excellent corrosion resistance makes it suitable for use in chemical reactors, pipelines, and heat exchangers.
Marine: Titanium’s resistance to seawater corrosion makes it ideal for use in the marine environment. Grade 9 flanges are used in offshore platforms, shipbuilding, and subsea pipelines to ensure reliable and long-lasting connections in harsh environments.
Power Generation: In power plants, flanges are used in piping systems handling water, steam, and other fluids under moderate pressure. Titanium’s strength and corrosion resistance ensure reliable operation in systems involving high temperature and pressure conditions.
Medical Equipment: Titanium Grade 9’s strength, biocompatibility, and resistance to corrosion make it useful in medical applications, including implants and surgical instruments, where long-lasting and safe material is needed.
5. Advantages and Specifications of Titanium Grade 9 Long Weld Neck Flanges Class 150
| Size in Inch | Size in mm | Outer Dia. | Flange Thick. | Hub OD | Weld Neck OD | RF Dia. | RF Height | PCD | Hub Length | No of Bolts | Bolt Size UNC | Machine Bolt Length | RF Stud Length | Hole Size | ISO Stud Size |
| | | A | B | C | D | E | F | G | H | | | | | | |
| 1/2 | 15 | 90 | 9.6 | 30 | 21.3 | 34.9 | 2 | 60.3 | As Required | 4 | 1/2 | 50 | 55 | 5/8 | M14 |
| 3/4 | 20 | 100 | 11.2 | 38 | 26.7 | 42.9 | 2 | 69.9 | As Required | 4 | 1/2 | 50 | 65 | 5/8 | M14 |
| 1 | 25 | 110 | 12.7 | 49 | 33.4 | 50.8 | 2 | 79.4 | As Required | 4 | 1/2 | 55 | 65 | 5/8 | M14 |
| 1 1/4 | 32 | 115 | 14.3 | 59 | 42.2 | 63.5 | 2 | 88.9 | As Required | 4 | 1/2 | 55 | 70 | 5/8 | M14 |
| 1 1/2 | 40 | 125 | 15.9 | 65 | 48.3 | 73 | 2 | 98.4 | As Required | 4 | 1/2 | 65 | 70 | 5/8 | M14 |
| 2 | 50 | 150 | 17.5 | 78 | 60.3 | 92.1 | 2 | 120.7 | As Required | 4 | 5/8 | 70 | 85 | 3/4 | M16 |
| 2 1/2 | 65 | 180 | 20.7 | 90 | 73 | 104.8 | 2 | 139.7 | As Required | 4 | 5/8 | 75 | 90 | 3/4 | M16 |
| 3 | 80 | 190 | 22.3 | 108 | 88.9 | 127 | 2 | 152.4 | As Required | 4 | 5/8 | 75 | 90 | 3/4 | M16 |
| 3 1/2 | 90 | 215 | 22.3 | 122 | 101.6 | 139.7 | 2 | 177.8 | As Required | 8 | 5/8 | 75 | 90 | 3/4 | M16 |
| 4 | 100 | 230 | 22.3 | 135 | 114.3 | 157.2 | 2 | 190.5 | As Required | 8 | 5/8 | 75 | 90 | 3/4 | M16 |
| 5 | 125 | 255 | 22.3 | 164 | 141.3 | 185.7 | 2 | 215.9 | As Required | 8 | 3/4 | 85 | 95 | 7/8 | M20 |
| 6 | 150 | 280 | 23.9 | 192 | 168.3 | 215.9 | 2 | 241.3 | As Required | 8 | 3/4 | 85 | 100 | 7/8 | M20 |
| 8 | 200 | 345 | 27 | 246 | 219.1 | 269.9 | 2 | 298.5 | As Required | 8 | 3/4 | 90 | 110 | 7/8 | M20 |
| 10 | 250 | 405 | 28.6 | 305 | 273 | 323.8 | 2 | 362 | As Required | 12 | 7/8 | 100 | 115 | 1 | M24 |
| 12 | 300 | 485 | 30.2 | 365 | 323.8 | 381 | 2 | 431.8 | As Required | 12 | 7/8 | 100 | 120 | 1 | M24 |
| 14 | 350 | 535 | 33.4 | 400 | 355.6 | 412.8 | 2 | 476.3 | As Required | 12 | 1 | 115 | 135 | 1 1/8 | M27 |
| 16 | 400 | 595 | 35 | 457 | 406.4 | 469.9 | 2 | 539.8 | As Required | 16 | 1 | 115 | 135 | 1 1/8 | M27 |
| 18 | 450 | 635 | 38.1 | 505 | 457.2 | 533.4 | 2 | 577.9 | As Required | 16 | 1 1/8 | 125 | 145 | 1 1/4 | M30 |
| 20 | 500 | 700 | 41.3 | 559 | 508 | 584.2 | 2 | 635 | As Required | 20 | 1 1/8 | 140 | 160 | 1 1/4 | M30 |
| 24 | 600 | 815 | 46.1 | 663 | 610 | 692.2 | 2 | 749.3 | As Required | 20 | 1 1/4 | 150 | 170 | 1 3/8 |
Using Titanium Grade 9 Long Weld Neck Flanges Class 150 provides several key advantages, particularly in applications requiring a balance of strength, corrosion resistance, and lightweight characteristics:
Superior Strength: Titanium Grade 9 offers higher tensile and fatigue strength compared to commercial pure titanium grades (such as Grade 1 and Grade 2). This makes it suitable for demanding applications where mechanical stress is a concern.
Excellent Corrosion Resistance: Titanium is known for its resistance to a wide range of corrosive environments, including seawater, acidic and alkaline solutions, and certain chemical compounds. Grade 9 performs excellently in harsh chemical, marine, and aerospace environments.
Lightweight: Titanium is a lightweight material, making it ideal for applications where weight savings are important, such as in aerospace and marine industries. The high strength-to-weight ratio ensures the flange can handle pressure and mechanical loads without adding excessive weight to the system.
Long Service Life: The corrosion resistance and strength of Titanium Grade 9 flanges contribute to an extended service life, reducing the need for maintenance and replacements over time.
Ease of Fabrication: Titanium Grade 9 offers good formability and weldability, making it easier to manufacture and install in various systems, particularly when welding is required.
Temperature Resistance: Titanium Grade 9 is able to withstand high temperatures without losing its strength or performance, making it suitable for moderate to high-temperature applications.
6. Conclusion
Titanium Grade 9 Long Weld Neck Flanges Class 150 ASME are an excellent choice for industries that require high strength, corrosion resistance, and reliable performance in moderate pressure systems. The Class 150 ASME rating ensures that these flanges are suitable for low- to moderate-pressure applications, while the Long Weld Neck design guarantees superior mechanical strength and better alignment during installation. With applications ranging from aerospace and marine to chemical processing and power generation, Titanium Grade 9 flanges offer unparalleled durability and performance in challenging environments.
By selecting Titanium Grade 9 flanges for your piping systems, you are ensuring long-lasting reliability, enhanced safety, and improved operational efficiency.
