8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 1/18
d ished head R=D R=50
D R r h s
* R = D 50 ÷ 180 ~ 5 x S 2 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radiusr - Knuckle radiush - Straight flangeH - Total depth
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 2/18
f l anged on l y head
D r h s
* 30 ÷ 400 ~ 5 x S 2 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radius
r - Knuckle radiush - Straight flangeH - Total depth
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 3/18
f l anged on l y head
D R r h s
* 1.5/2 D 30 ÷ 150 ~ 5 x S 2 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radiusr - Knuckle radiush - Straight flangeH - Total depth
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 4/18
d ished head R=D R=50
D R r h s
* R = D 50 ÷ 180 ~ 5 x S 2 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radiusr - Knuckle radiush - Straight flangeH - Total depth
t o r i sphe r i ca l shape d i shed head
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 5/18
D R r h s
* R = D 0.10 D ~ 5 x S 2 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radiusr - Knuckle radiush - Straight flangeH - Total depth
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 6/18
e l i p t i ca l shape d i shed head
D R r h s
* 0.833 D 1.156 D ~ 5 x S 2 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radius
r - Knuckle radiush - Straight flangeH - Total depth
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 7/18
i n v e r ted d i shed and f l anged head
D R r h s
* R = D 30 ÷ 50 ~ 5 x S 2 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radiusr - Knuckle radiush - Straight flange
H - Total depth
d i shed and se t back head
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 8/18
D R r a s
* * 10 ÷ 50 ~ 20 x 80 3 ÷ 20
notes and symbols:* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radiusr - Knuckle radiush - Straight flangeH - Total depth
d i shed f l anged and necked ou t head
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 9/18
D R r d r¹ h s
* * 50 ~ 5 x S 3 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radius
r - Knuckle radiush - Straight flangeH - Total depth
f l anged on l y and necked ou t head
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 10/18
D r r¹ d h s
* * ~ 5 x S 3 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - ThicknessR - Dishing radiusr - Knuckle radiush - Straight flange
H - Total depth
f l anged on l y and necked ou t head
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 12/18
D r d h H s
* * * 3 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - Thickness
R - Dishing radiusr - Knuckle radiush - Straight flangeH - Total depth
cone
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 13/18
D r d h H s
* * * 3 ÷ 20
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - Thickness
R - Dishing radiusr - Knuckle radiush - Straight flangeH - Total depth
hemi sphe r i ca l head ( c rown and segmen ts )
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 14/18
D s n° segments
* 3 ÷ 60 on examination
notes and symbols:
* - On demandd - Inside diameter D - Outside diameter S - Thickness
R - Dishing radiusr - Knuckle radiush - Straight flangeH - Total depth
Head (vessel)
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 15/18
From Wikipedia, the free encyclopedia
Steel Pressure Vessel
The end caps on a cylindrically shaped Pressure vessel are commonly
known as heads.
[edit]Head shapes
The shape of the heads used can vary. The most common[1][2][3] head
shapes are:
Hemispherical head
A sphere is the ideal shape for a head, because the pressure in the
vessel is divided equally across the surface of the head. The radius
(r) of the head equals the radius of the cylindrical part of the
vessel.Ellipsoidal head
This is also called a 2:1 elliptical head. The shape of this head is
more economical, because the height of the head is just a quarter
of the diameter. Its radius varies between the major and minor axis.
Torispherical head
These heads have a dish with a fixed radius (r1), the size of which
depends on the type of torispherical head.[4] The transition between
the cylinder and the dish is called the knuckle. The knuckle has atoroidal shape. The most common types of torispherical heads are:
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 16/18
Schematic of a torispherical head
Klöpper head
This is a torispherical head. The dish has a radius that equals the
diameter of the cylinder it is attached to (r 1 = Do). The knuckle has
a radius that equals a tenth of the diameter of the cylinder (
), hence its alternative designation "Decimal head".
Also other sizes are: ,[5](page13) rest of height
(lets say h2) .
Korbbogen head
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 17/18
This is a torispherical head. The radius of the dish is 80% of the
diameter of the cylinder ( ). The radius of the knuckle
is ( ).
Also other sizes are: , rest of height (lets
say h2) . This
shape[6] finds its origin in architecture.[7]
Flat head
This is a head consisting of a toroidal knuckle connecting to a flat
plate. This type of head is typically used for the bottom
of cookware.
Pans typically have a bottom in the shape of a flat head
Diffuser head
This type of head is often found on the bottom of aerosol spray
cans. It is an inverted torispherical head.
8/6/2019 Steel Heads of Vesse;s
http://slidepdf.com/reader/full/steel-heads-of-vesses 18/18
Typical application of a diffuser head: the bottom of an aerosol spray can
Conical head
This is a cone-shaped head.[edit]