What are the Uses of Dished Head?

What are the Uses of Dished Head?

A vessel head, also known as an end cap, is a crucial component used to seal off the ends of pressure vessels, effectively isolating the contents from the external environment.

These heads come in various geometric shapes, including spherical, elliptical, dished (torispherical), toriconical, conical, and flat. Spherical, elliptical, torispherical, and toriconical heads are often grouped together as "convex heads."

Depending on the joining method, vessel heads can be classified as butt-welded or socket-welded. They are integral to a wide array of pressure vessels and equipment, such as storage tanks, heat exchangers, towers, reactors, boilers, and separation units.

A variety of materials are used in their construction, including carbon steel (e.g., A3, 20#, Q235, Q345B, 16Mn), stainless steel (e.g., 304, 321, 304L, 316, 316L), alloy steel (e.g., 15Mo3, 15CrMoV, 35CrMoV, 45CrMo), as well as aluminum, titanium, copper, nickel, and nickel alloys.

Relevant industry standards for vessel heads include:

• Pressure Vessel Heads: GB/T25198-2010

• Pipeline Standards: GB/T12459-2005, GB/T13401-2005

• Power Industry Standards: DL/T695-1999, D-GD87-0607

• Petrochemical Standards: SH3408-1996, SH3409-1996

Vessel heads are essential in many industries from petrochemicals and atomic energy to food and pharmaceuticals, they are a vital part of pressure vessel equipment.

A vessel head serves as the end closure of a pressure vessel and bears a significant pressure load. Its primary function is to provide a seal. It is commonly used to form the top and bottom of tank-shaped pressure vessels. Alternatively, when a pipe run terminates and needs to be sealed, a welded head provides a secure closure.

While similar in purpose to blind flanges and pipe caps, vessel heads differ in that they cannot be detached after welding, unlike the other two. The integrity of a vessel head is crucial for the safe and reliable operation of the entire pressure vessel system. These heads are used in conjunction with other pipe fittings such as vessels, pipes, flanges, elbows, tees, and crosses.

Vessel heads are commonly found in many applications and form a type of common pressure vessel equipment.

Their use extends to diverse sectors, including petroleum, electronics, heating, chemicals, pharmaceuticals, wastewater treatment, light textiles, food processing, machinery manufacturing, construction, nuclear power, aerospace, pressure vessel manufacturing, and military applications, among others.

Haipei Industry is a leading provider of heat exchangers, offering over 33 years of experience in the production and development of vessel head technology. We specialize in the manufacturing, stocking, and supply of Elliptical Heads, hemispherical heads, and torispherical heads at competitive prices and with high quality standards.

As a division of Haipei Industry, Heat Transfer Division, has evolved into a specialized supplier of key customized components for shell and tube heat exchangers. We offer comprehensive, one-stop service to our clients, providing products such as U-tubes, tube sheets, shell flanges, baffle plates, vessel heads, and fin tubes.

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