Grade 1 Grade 2 Titanium Hemispherical Head Dish Shaped Titanium Head Equipment Titanium Equipment

Grade 1 Grade 2 Titanium Hemispherical Head Dish Shaped Titanium Head Equipment 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:

Types of Dish Heads

Dish heads come in various shapes, each chosen based on specific application requirements. Here are the common types:

1. Hemispherical Heads:

   • Shape: A perfect half-sphere, the hemispherical head provides optimal stress distribution and is considered the most efficient head shape in terms of material usage under internal pressure.
   • Usage: Common in high-pressure applications like reactors, pressure vessels, and boilers.

2. Elliptical Dish Heads:

   • Shape: This is a head with an elliptical curvature. It offers a balance between strength and material usage and is often used in applications requiring moderate pressure resistance.
   • Usage: Suitable for medium-pressure storage tanks, heat exchangers, and reactors.

3. Convex Heads:

   • Shape: Convex heads have a rounded, outward-facing curvature. Common examples are spherical heads, oval heads, and disc-shaped heads.
   • Usage: These heads are often used in gas cylinders, boilers, chemical reactors, and similar pressure vessels, where the convex design can help distribute internal pressure efficiently.

4. Spherical Crown Heads:

   • Shape: The spherical crown is part of a sphere and is typically used to minimize material use while providing optimal strength.
   • Usage: This type is preferred for high-pressure systems where minimal thickness and efficient stress distribution are essential.

5. Conical Heads:

   • Shape: A conical head has a cone-like shape that is typically used in applications requiring a gradual transition between the vessel’s cylindrical part and the container's dome.
   • Usage: Common in separation equipment, heat exchangers, and boilers.

6. Flat Heads:

   • Shape: These heads are flat in shape, generally used in low-pressure applications where the vessel does not need to withstand significant internal pressure.
   • Usage: Used in storage tanks, piping systems, and certain heat exchangers.

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.

Applications of Dish Heads

Dish heads are used in various industries and applications that require pressure containment or separation of internal and external media:

• Storage Tanks:
  Used to seal the ends of tanks storing liquids, gases, or chemicals under pressure.

• Heat Exchangers:
  Found in systems that transfer heat between fluids, the heads help close off the ends of heat exchangers while maintaining pressure integrity.

• Boilers:
  In steam boilers, dish heads ensure that the pressure and heat are contained within the system.

• Reactors:
  Used in chemical reactors, nuclear reactors, and other reaction vessels, where pressure and safety are critical.

• Separation Equipment:
  Found in filtration and separation systems where the containment of liquids and gases is necessary under pressure.

• Gas Cylinders:
  Convex heads are often used in the manufacture of gas cylinders, which store gases under pressure.

Chemical composition

Mechanical Property