# What does tank head mean?

## What does tank head mean?

Tank heads are the end caps on cylindrically-shaped pressure vessels. They generally comply with ASME standards or similar codes because of the high pressures they must withstand for use with gas storage tanks, driving cylinders, distillation towers, and reactors.

What is a 2 1 elliptical head?

The Semi-Elliptical (SE) Heads are designed in a 2:1 ratio, or also known as 2:1 head. This means that in this type, the diameter to the depth ratio is 2:1. Meaning that the head depth is four times the head width. This SE head appears like a half ellipse, so its head depth is usually a quarter of its diameter.

### Why Torispherical heads are used in pressure vessels?

Torispherical Heads or Flange and Dished Heads : It also has more radial section for pressure distribution so it also withstand maximum pressure but lower than ellipsoidal Heads.

What is ASME F&D?

ASME (American Society of Mechanical Engineers) Flanged and Dished Heads (ASME F&D) are perfect for pressure vessels made to withstand limited pressure. Never the less the Flanged and Dished Heads possess a flatter or lower profile, which makes them an ideal fit for pressure vessels that have a height restriction.

#### What is the knuckle of a tank?

It is the major radius of the formed head, usually measured from the inside of the head. KNUCKLE RADIUS (ICR): Also known as inside corner radius. It is the formed radius of the head which transitions the dish portion of the head to the straight flange.

Why is it called a header tank?

A header tank is a container of liquid positioned at a higher level than a main tank, so that the level of pressure can be maintained.

## What is a Torispherical head?

A torispherical dome is the surface obtained from the intersection of a spherical cap with a tangent torus, as illustrated above. The radius of the sphere is called the “crown radius,” and the radius. of the torus is called the “knuckle radius.” Torispherical domes are used to construct pressure vessels.

Flanged and Dished (F&D) Here a 48” inside radius (equal to the outside diameter of the cylinder) used for the crown of the head, along with a tight 2.973” knuckle results in a head that is lower than the semi-elliptical.