Titanium Alloys Titanium Hemispherical Dish Tank titanium

Titanium Grade 1 is commercially pure titanium (CP-Ti) with 99.5% titanium. It has minimal alloying elements and provides excellent resistance to corrosion, especially in mild corrosive environments.

• Corrosion resistance: Superior in most environments, especially in oxidizing environments, seawater, and mild acids.
• Strength: Gr1 is the softest and most ductile of titanium alloys, with moderate strength.
• Formability: Excellent workability and weldability, making it ideal for applications requiring complex shapes and structures.
• Applications: Used primarily in chemical processing, marine equipment, desalination plants, and storage tanks where corrosion resistance is more critical than strength.

Grade 2 is also commercially pure titanium but with slightly more iron content (up to 0.3%), which enhances its strength over Gr1 while retaining good corrosion resistance.

• Corrosion resistance: Excellent resistance to a wide range of chemicals, including chlorides, acids, and alkalines, making it well-suited for chemical reactors, heat exchangers, and marine applications.
• Strength: Higher than Grade 1, offering a good balance between strength and weight. However, it is not as strong as higher-strength titanium alloys like Grade 5.
• Formability: Excellent weldability and workability. Gr2 is widely used in pressure vessels, tanks, and piping systems.
• Applications: Common in seawater desalination, chemical process equipment, storage tanks, and marine environments.

A dish-shaped hemispherical head is one of the most common types of pressure vessel heads. The hemispherical shape is ideal for pressure applications due to its structural efficiency in distributing pressure uniformly across the surface. Titanium is particularly well-suited for these applications due to its high strength-to-weight ratio and corrosion resistance.

Titanium hemispherical heads are typically produced using processes like deep drawing, hot forming, or pressing. The general process includes:

1. Sheet Preparation: Titanium alloy sheets are cut to the required size.
2. Forming: The titanium sheet is heated and then pressed or drawn into the hemispherical shape using a press or a forming die.
3. Welding: If needed, the hemispherical head is welded to the cylindrical body of the vessel or tank. Titanium welding requires careful control of heat and the welding environment to prevent contamination.
4. Post-Processing: After forming and welding, the titanium hemispherical heads may undergo treatments such as pickling, polishing, or passivation to enhance corrosion resistance and surface quality.