Plate-type head (Plate-type)
The shallowest formed head, one step beyond a completely flat head
A plate-type head has a very shallow shape whose crown radius (CR) is taken as equal to the vessel's inside diameter (Di), with no separate knuckle (KR) or straight flange (SF) in the basic formula. This head can be seen as halfway between a completely flat head and deeper heads such as the convex disc.
What is a plate-type head?
A plate-type head has a very shallow shape whose crown radius is taken as equal to the vessel's inside diameter, with no separate knuckle or straight flange in the basic formula. It sits between a completely flat head and deeper forms such as the convex disc.
Because of its very slight curvature, it is not suited to high pressure, but compared with a completely flat head it has somewhat more load capacity against bending.
Geometry formulas of the plate-type head
The basic formula of this head is the simplest of the formed types:
When a completely flat head is not enough but a torispherical head cannot be justified economically, the plate type is a practical middle option.
Online calculation
See the head's dimensions, volume and weight for a real diameter and thickness
Plate-type head (Plate-type)
Liquid level and volume inside this head
How the head is mounted
Development of this head (flat blank before forming)
The diameter of a flat plate of the same thickness and material that weighs the same as the formed head — an initial workshop estimate based on equal weight, not allowing for thickening or extra stretching at the knuckle.
The vessel head production process
From calculating the blank diameter to final edge preparation — the steps of making a vessel head in the workshop
Calculating the blank diameter
Cutting a disc from plate with the diameter and thickness calculated for the head type and vessel diameter
Cutting the plate blank
Precise cutting of steel or stainless plate by plasma, laser or gas according to the technical drawing
Pressing the head
Hot or cold forming of the disc with a die and industrial press until it reaches the final head profile
Edge preparation
Machining the edge, bevelling and preparing the weld area for fitting to the vessel shell
Video coming soonChoosing a head: the balance between pressure, cost and time
This type is mostly chosen for low-pressure equipment, or as a middle option when a completely flat head is not enough visually or structurally, but there is no economic justification for a deeper head such as torispherical.
Gallery of heads we have made
Plate-type head gallery
Applications and industries served
Buying heads from Behineh Ab
Six steps from first contact to delivery
Give the outside diameter, plate thickness, head type and required material.
The calculated weight, unit price and delivery time are sent the same business day.
Plate is supplied with the mill certificate and inspected on arrival before cutting.
Cutting the disc, hot or cold pressing depending on thickness, and checking dimensions with a template.
Machining the cylindrical edge and bevelling it ready for welding to the shell.
Packing, issuing the part identification sheet and shipping nationwide.
What sets us apart
Price inquiry
vessel head
Enter the diameter, thickness and head type; you will receive the calculated weight and unit price.
- Quotation with the exact weight of the part
- Standard heads delivered in 7 business days
- Shipping nationwide
