Conical head (Conical)
The only real choice for complete discharge of solids or sludge from the tank bottom
Unlike other types, a conical head is not used at the top of a vessel; it is made for the bottom of tanks that must discharge their solid, granular or sludge-like contents completely and without residue. Its main parameters are SF (the straight cylindrical height above the cone), BL (the length of the conical part) and Ds (the outlet diameter at the narrow end).
What is a conical head?
A conical head is made for the bottom of tanks that must discharge solid, granular or sludge contents without residue. Its main parameters are SF (the straight height above the cone), BL (the length of the conical part) and Ds (the outlet diameter).
The cone angle and outlet diameter must be chosen to suit the material's natural angle of repose; an insufficient angle causes a blocking arch to form at the outlet and stops the flow.
Geometry formulas of the conical head
The geometry is defined by an angle and three independent parameters, not by a dome radius:
If Ds is too small for the particle size and angle of repose, rat-holing stops the flow; set Ds from the material's physical properties, not just the vessel dimensions.
Online calculation
See the head's dimensions, volume and weight for a real diameter and thickness
Conical head (Conical)
Liquid level and volume inside this head
How the head is mounted
Development of this head (truncated cone fan before rolling)
Unlike formed heads, a conical head is not made from a full circular plate; it is cut from an annular sector (fan) and rolled. R1 and R2 are the distances from the apex of the imaginary full cone to the small and large edges, and α is the opening angle of this sector.
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
If Ds is chosen too small for the particle size and the material's natural angle of repose, the material forms an arch at the outlet and the flow stops completely (rat-holing or bridging). Calculating Ds correctly from the physical properties of the stored material, not just the vessel dimensions, is essential.
Gallery of heads we have made
Conical 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
