Titanium Hemispherical Head Dish Shaped Grade 5 Grade 7 Ti Titanium Equipment

The dish head refers to the element used to close the end of the container so that the internal and external

media are isolated, also known as hemispherical heads/dish end/ Elliptical Dish End. The head of a cylindrical

container is usually a revolving case. According to the shape of the head surface, it can be divided into convex

shape, conical shape, flat shape and combination shape. Convex heads refer to heads with convex outer surface

shape, such as hemispherical, oval, disc and unflanged spherical heads. Some gas cylinders use convex inward

combined bottom head, which can not only ensure strength, but also meet the needs of safe use.

A head is a part of a container that is welded to the cylinder According to different geometric shapes, it can be

divided into spherical, oval, disc, spherical crown, cone shell and cap, among which spherical, oval, disc and

spherical crown heads are collectively referred to as convex heads. In the welding is divided into butt welding

head, socket welding head. Used for all kinds of container equipment, such as storage tank, heat exchanger,

tower, reactor, boiler and separation equipment, etc.

(Titanium dish head )DIN28013:

Titanium dish heads are used extensively in industries that require high-performance, corrosion-resistant materials to handle extreme conditions. The unique properties of titanium, such as its excellent strength-to-weight ratio, resistance to corrosion (especially in aggressive environments), and high temperature tolerance, make it ideal for a variety of critical applications. Below are the key areas where titanium dish heads are typically utilized:

1. Pressure Vessels

Titanium dish heads are widely used in pressure vessels due to their superior strength, durability, and ability to withstand both high pressures and harsh environments. These pressure vessels often store liquids, gases, or chemicals under high pressure, and the titanium dish head provides a reliable, leak-proof seal.

• Application: Used in industries like petrochemicals, nuclear energy, and industrial gas storage.

2. Oil Exploration

In oil exploration, titanium dish heads are used in various equipment exposed to high-pressure environments, such as offshore oil rigs and subsea equipment. Titanium’s ability to resist corrosion in seawater, combined with its strength, makes it an ideal material for oil exploration applications.

• Application: Used in subsea pipelines, blowout preventers, and other high-pressure equipment.

3. Gas Exploration

Similar to oil exploration, gas exploration requires equipment that can handle extreme pressure and resist corrosion from gases like hydrogen sulfide (H₂S) and carbon dioxide (CO₂). Titanium dish heads are ideal for this purpose, ensuring the structural integrity of gas storage and transport systems.

• Application: Common in gas storage vessels, compressors, and gas processing plants.

4. Heat Exchangers

In heat exchangers, titanium dish heads are often used to seal the ends of the exchangers. Titanium’s resistance to corrosion and high thermal conductivity make it suitable for heat transfer applications, especially in aggressive environments like marine applications, chemical processing, and desalination plants.

• Application: Used in seawater-cooled heat exchangers and chemical reactors.

5. Power Generation

Power generation facilities, especially those that involve steam or nuclear power, require pressure vessels and associated components that can handle high temperatures and pressures. Titanium dish heads provide a reliable sealing mechanism, ensuring the safe containment of fluids and gases under such conditions.

• Application: Found in boilers, steam turbines, and nuclear reactors.

6. Chemical Processing

The chemical processing industry often involves corrosive chemicals and extreme temperatures. Titanium dish heads are used in various equipment like reactors, tanks, and storage vessels, offering excellent resistance to acidic and caustic chemicals.

• Application: Used in chemical reactors, storage tanks, and mixing vessels.

7. Desalination

Desalination processes, which convert seawater into fresh water, involve significant exposure to corrosive saltwater and high-pressure environments. Titanium is highly resistant to corrosion from saltwater, making it an ideal material for desalination equipment, including pressure vessels, heat exchangers, and pumps.

• Application: Used in reverse osmosis units, evaporators, and desalination plants.

8. Water Treatment

Titanium dish heads are used in water treatment plants, where they help manage the storage and filtration of water, particularly in harsh conditions involving acidic or alkaline water. Titanium’s resistance to corrosion and scaling makes it an optimal choice for both potable water and wastewater treatment applications.

• Application: Used in filtration tanks, treatment reactors, and pressure vessels.

Production Procedures for Titanium Dish Heads

The production of titanium dish heads involves several critical steps to ensure the material meets the stringent requirements of strength, corrosion resistance, and surface finish. Here's a breakdown of the production process:

Initial Production of Titanium Plates or Clad Steel Plates

• Process: The production begins with the creation of titanium plates or clad steel plates, which will be formed into dish heads. These plates are either pure titanium or titanium alloys and may also involve cladding with other metals for enhanced properties.
• Inspection: The initial plates are inspected for any defects in the material such as cracks, inconsistencies, or impurities.

Cleaning and Grinding Plate Surface

• Process: The surfaces of the titanium plates are thoroughly cleaned to remove any oxidation, grease, or other contaminants. After cleaning, the surfaces are ground to a smooth finish to prepare for the forming process.

Coat Protection & Paint

• Process: A protective coating is applied to the plate to prevent any damage during the forming and handling process. In some cases, paint may be applied to provide further corrosion resistance or for aesthetic purposes.

Forming (Hot or Cold Forming)

• Process: The titanium plate is then formed into a dish shape, either through hot forming (at elevated temperatures to increase malleability) or cold forming (at room temperature). This process shapes the plate into the desired dish head configuration, which could be hemispherical, elliptical, or conical.

Preparation for Cutting & Grinding

• Process: After forming, the dish head is prepared for cutting. Excess material is trimmed, and the edges are ground to ensure a clean, uniform finish.

Pickling

• Process: Pickling involves immersing the titanium dish head in an acid bath to remove any scale, oxide layer, or contaminants formed during the forming and welding process. This step ensures the dish head has a clean surface for further processing.

UT & PT Testing

• Process: Ultrasonic Testing (UT) and Penetrant Testing (PT) are carried out to detect any internal or surface flaws, respectively. These non-destructive testing methods ensure the structural integrity of the titanium dish head.

Surface Polishing as Requested

• Process: If a specific surface finish is required (e.g., high-gloss or satin), polishing is done to achieve the desired appearance and smoothness. This also enhances the corrosion resistance of the surface.

Final Inspection

• Process: A final inspection is conducted to ensure that the titanium dish head meets all specified requirements, including dimensions, quality standards, and performance criteria. Any defects or discrepancies are addressed before moving to the next stage.

Packing

• Process: Once the titanium dish head passes all inspections, it is carefully packed for shipment. The packaging protects the dish heads from damage during transport, ensuring that they arrive in excellent condition at the installation site.

Applications of titanium Elliptical Heads:

The materials of Elliptical Heads: The dish head can be made of various materials according to the material of

the equipment body. For example, carbon steel (A3, 20#, Q235, Q345B, 16Mn, etc.), stainless steel (304, 321,

304L, 316, 316L, etc.), alloy steel (15Mo3 15CrMoV 35CrMoV 45CrMo), non-ferrous metals (aluminum, titanium,

copper, nickel and nickel alloy, etc.). The material must be the same as that of the device.We are specialized in

titanium hemispherical Heads.

Welding Types for Dish Heads

Dish heads are typically welded to the cylindrical body of a pressure vessel, and depending on the design, there are two common types of welding methods:

1. Butt Welding:

   • This is where the edges of the dish head and the cylindrical body are aligned and welded along their circumference. It ensures a smooth, flush connection that can withstand high internal pressures.

2. Socket Welding:

   • In this type, the head is fitted into a socket on the end of the cylinder, and the connection is made by welding the outer circumference of the socket. This method is more commonly used for smaller diameter vessels or low-pressure systems.

Specifications of Titanium Heads:

Chemical composition

Mechanical Property