Major parts of tanks and vessels:

Strake:- Section of the cylindrical "shell" of the tank/vessel formed by rolling a piece of steel and joining at the seam.

Shell:- The cylindrical section of the tank or vessel formed by 1 or more "strakes"

Head:- A type of enclosure for the top, bottom or end of a tank. Can range in shape from hemispherical, to a very light dished depth. Heads are formed by pressing a dish in a circular blank and then rolling a "knuckle" around the perimeter to enable a butt weld to the "shell".

Cone:- A conical section which is used to form either the bottom, top or end enclosures of the tank/vessel.  Formed by rolling a circular pice of material with a segment removed.  Once rolled and joined the shape is conical.  This can be welded directly to the "shell" or can have a "knuckle" rolled onto it to enable a but weld connection to the "shell"

Skirt:- A support system for a vertical vessel whereby a cylindrical section of material is attached to the shell of the tank such that it takes the load of the vessel and provides a level support mechanism.

Legs:- An alternative support system whereby a number of sectional members are attached to the vessel shell in order to stand the vessel up.

Circumferential weld:- The welded joint around the circumference of the tank/vessel that connects strakes to strakes or the end enclosures.

Seam Weld:- The welded joint that joins the rolled "strake" material.

Neck:- The opening in a top "cone" of a tank where it extends beyond a simple flange.

Manway:- A large opening in the "shell" that enables access by personell to the inside of the tank/vessel.

Cladding:-  A second skin of material that covers any insulation material that is wrapped around the tank/vessel.

Hydrostatic test:-  A test for tank/vessel integrity that involves filling the tank/vessel with water to check for leakage.

CIP:- Clean in Place system.

Dimple plate:-  A component of a tank that allows for heating or cooling of the tanks contents by running liquid through a cavity between the "shell" of the tank and a thinner outer skin which has been welded to the shell.  After blowing the cavity with high pressure gas the thinner material blisters forming a dimple pattern.