Delivery program "One-Piece Heads" - Dillinger Hütte GTS

ONE-PIECE HEADS
Hemispherical one-piece head, seamless: ID 3.520 mm x 70 mm in steel SA 516 grade 70 ASME II-A
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One-piece heads serve for example
as end pieces for pressure
vessels and power boilers. The
widest range of shapes is available:
spherical, torispherical,
elliptical, etc. The flat heads i.e.
flanged only within the proposed
dimensional range are mainly
used for the fabrication of ladles
involved in metallurgical
processes.
Manufacturing process
One-piece heads in Dillingen are
always hot formed by deepdrawing,
the circular blanks being
free of any weld seam. They
are dished by the means of
hydraulic presses up to 2.500 tons
fitted with the proper tooling i.e.
ring and die, the shape of which
suits the inside contour of the
head. The edges are generally
worked by flame cutting; the
machining of the weld-edge
preparation can be also agreed
upon for heads with wall thicknesses
above 30 mm.
Heavy Fabrication Division Dillinger Hütte GTS, One-piece heads [1/7], 2008
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Scope of supply
Seamless heads can be supplied
spherical-shaped in outside
diameters up to 3.650 mm, torispherical
or elliptical-shaped up
to 4.450 mm or flanged only up
to 4.750 mm. The "Dimensional
Program" table provides information
concerning the standard
shapes, diameters and wall
thicknesses to which the heads
can be manufactured:
intermediate dimensions and
other head shapes must be
agreed upon. Please refer also to
the Technical Delivery Conditions
on page 32.

Dimensional program
Wall thickness related to the external diameter for the different shapes
Outside diameter Thickness (mm)
(mm)
Elliptical 1) & Spherical 3) Flanged only 4)
torispherical 2)
from up to from up to from up to
1.000 & 1.050 6 90 12 90 - -
1.100 & 1.150 6 90 13 100 - -
1.200 & 1.250 6 100 14 120 - -
1.300 & 1.350 6 100 15 130 - -
1.400 & 1.450 6 110 16 140 - -
1.500 & 1.550 7 120 17 150 - -
1.600 & 1.650 7 120 18 170 - -
1.700 & 1.750 7 130 19 180 - -
1.800 & 1.850 7 130 20 200 - -
1.900 & 1.950 8 140 22 200 - -
2.000 & 2.050 8 140 24 200 - -
2.100 & 2.150 9 150 26 200 - -
2.200 & 2.250 9 150 28 200 - -
2.300 & 2.350 10 160 30 200 20 75
2.400 & 2.450 10 160 32 200 20 75
2.500 & 2.550 11 170 34 200 20 80
2.600 & 2.650 11 170 36 180 20 80
2.700 & 2.750 12 170 38 180 22 85
2.800 & 2.850 12 170 40 180 22 85
2.900 & 2.950 13 170 40 160 22 90
3.000 & 3.050 14 170 40 160 22 90
3.100 & 3.150 15 170 40 150 22 100
3.200 & 3.250 16 160 40 150 24 100
3.300 & 3.350 17 160 40 140 24 100
3.400 & 3.450 18 150 40 140 24 100
3.500 & 3.550 19 150 40 130 24 100
3.600 & 3.650 20 140 40 120 24 100
3.700 & 3.750 21 140 - - 24 100
3.800 & 3.850 22 120 - - 24 100
3.900 & 3.950 23 120 - - 24 100
4.000 & 4.050 24 110 - - 26 100
4.100 & 4.150 25 110 - - 26 100
4.200 & 4.250 26 110 - - 26 100
4.300 & 4.350 27 110 - - 28 100
4.400 & 4.450 28 110 - - 28 100
4.500 & 4.550 - - - - 30 100
4.600 & 4.650 - - - - 30 100
4.700 & 4.750 - - - - 30 100
The data on wall thicknesses apply for steel with 355 N/mm 2 yield
strength. The flange height complies with the applicable standard or
the customer's requirements but - due to the tool design - is normally
restricted to 150 mm. Please inquire for other head shapes and intermediate
dimensions.
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1) Elliptical heads to NF E 81-103 (axis ratio 1.9:1) und ASME
Code (axis ratio 2:1)
2) Torispherical heads to DIN 28 013 and SMS-482
3) Depending on the required design, the available diameters for
spherical heads can be restricted or enlarged
4) Flat heads can be produced with a knuckle-radius between 50
and 150 mm
Heavy Fabrication Division Dillinger Hütte GTS, One-piece heads [2/7], 2008

Standard tolerances
Edge-preparation flame-cut machined
Bevel angle ± 2.0° ± 1.0°
Land position 1) ± 2.0 mm ± 1.0 mm
Land height ± 2.0 mm ± 1.0 mm
Milling radius 2) ± 1.0 mm
Cut face quality ISO 9013-33 ISO 1302-N9
1) measured from the reference diameter Da or Di
2) applicable just to U and DU edges only
Diameter, out-of-roundness and shape according to applicable fabrication codes e.g. ASME I, ASME
VIII-1, ASME VIII-2, PD 5500, BS 1113, CODAP or AD 2000.
Heavy Fabrication Division Dillinger Hütte GTS, One-piece heads [3/7], 2008
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Information required
Torispherical heads
Shape
(applicable standard or dishing radius r 1
and knuckle radius r 2)
Diameter Da or Di
Minimum wall thickness after forming s
Straight flange h 1
Weld-edge preparation
Elliptical heads
Shape
(applicable standard or axis ratio b : a)
Diameter Da or Di
Minimum wall thickness after forming s
Straight flange h 1
Weld-edge preparation
Flat heads, flanged only
Diameter Da or Di
Minimum wall thickness after forming s
Dishing radius or knuckle radius r 1
Straight flange h 1 or depth h 3 (h 1+h 2)
Weld-edge preparation
Heavy Fabrication Division Dillinger Hütte GTS, One-piece heads [4/7], 2008
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s
s
s
a
D i
D a
D i
D a
D i
D a
r 1
b
r 2
r 2
h 2
h 1
h 2
h 1
h 1
h 3
h 3
h 3

Information required
Hemispherical heads with straight flange
Dishing radius r 1 or inside diameter Di
Minimum wall thickness after forming s
Straight flange h 1 or depth h 3 (h 1+h 2)
Weld-edge preparation
Hemispherical heads (r 1 = h 3)
Dishing radius r 1 or inside diameter Di
Minimum wall thickness after forming s
Weld-edge preparation
Spherical heads
Dishing radius r 1
Connecting inside diameter
Dh or "negative" height h1 or
depth h3
Minimum wall thickness after forming s
Weld-edge preparation
Heavy Fabrication Division Dillinger Hütte GTS, One-piece heads [5/7], 2008
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s
s
s
D h
D i
D a
D i
D a
r 1
r 1
r 1
h 3
h 1
h 2
h 1
h 3
h 3

HOT DISHING PROCESS OF
ONE-PIECE HEADS
OD 4.200 mm x 80 mm in steel SA 516 grade 70
1. Circular blank being removed out of the furnace once heated at the proper temperature
2. Circular blank being transferred to the 2500 t - hydraulic press by means of the overhead crane
3. Circular blank being positioned onto the forming ring laying on the lateral transfer lorry
Heavy Fabrication Division Dillinger Hütte GTS, One-piece heads [6/7], 2008
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6. Dished head being extracted out of the forming tools
HOT DISHING PROCESS OF
ONE-PIECE HEADS
OD 4.200 mm x 80 mm in steel SA 516 grade 70
4. Lateral transfer lorry being positioned within the operating area of the hydraulic press fitted with the forming die
5. Circular blank being dished
Heavy Fabrication Division Dillinger Hütte GTS, One-piece heads [7/7], 2008
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