The standard size and volume of the head can be described in detail according to different types and sizes of heads. The following are several common types of heads and their standard specifications, sizes, and capacities:
Elliptical head
Elliptical head is a commonly used type of head in pressure vessels, with the following standard specifications, dimensions, and volumes:
Nominal diameter (Dg): 300, 350, 400, 450, 500, 600
Surface height (h1): 75, 88, 100, 112
Straight edge height (h2): 25, 30, 40
Wall thickness (S): 3, 4, 5, 6, 7, 8, 9
Internal surface area (F): 0.121, 0.16, 0.204, etc
Volume (V): 0.0053, 0.00802, 0.0115, etc
Quality (G): 2.9, 3.88, 4.91, 5.89, 6.92, etc
Spherical head
Spherical head is another common type of head, with the following standard dimensions and volumes:
Nominal diameter (Dg): 500, 600, 700, 800, 900, 1000
Surface height (h1): Same as nominal diameter
Straight edge height (h2): may vary according to specific standards
Wall thickness (S): varies depending on the material and pressure rating
The internal surface area (F) and volume (V) need to be calculated based on specific dimensions
Dish shaped head and conical head
These two types of heads also have specific standard specifications, sizes, and capacities, but the specific parameters need to be selected and calculated according to design requirements and standards.
Wall thickness selection for different materials
For carbon steel and high alloy materials, the selection of wall thickness also varies. For example, the wall thickness of carbon steel can be chosen from 3, 4, 5, 6, 7, 8, 9, etc., while the wall thickness of high alloy materials may choose thicker sizes to adapt to higher pressure and temperature environments.
