Our delivery program - head types and inspection/manhole covers
 
We are capable to manufacture dished heads up to 6.000 mm diameter, in all usual shapes and variations, using cold- and hot formed carbon, stainless and duplex steels, also non-ferrous metals and special alloys. On request, all dished heads can be grinded according to customer's specification on our automatic grinding machines. In addition we are producing oval standard inspection and manhole covers and as a special part we have the possibility to press special components according to customer's specification.

Head types and inspection/manhole covers (pdf for printing)
Edge forms according to DIN 28011 and 28013 (pdf for printing)
 
Torispherical head
DIN 28011

R = Do
r = 0,1 x Do
h1 >= 3,5 x s
h2 = 0,1935 x Do - 0,455 x s
h3 = h1 + h2

(max. 7.000 mm Do and 38 mm thick)
 
Semi ellipsoidal head
DIN 28013

R = 08 x Do
r = 0,154 x Do
h1 = 3 x s
h2 >= 0,255 x Do - 0,63 x s
h3 = h1+ h2

(max. 6.200 mm Do and 38 mm thick)
 
Standard-type/flat dished head

R = Do (standard-type head)
R = 1,3 x Do (flat dished head)
r = 15-50 mm, on request > 50 mm
h1 >= 3,5 x s
h2 = dished height
h3 = h1 + h2

(max. 7.000 mm Do and 38 mm thick)
 
Convex disc

Form R = Do
h2 = 0,134 x Do

Form R = 0,8 x Do
h2 = 0,176 x Do

Form R => Do on request possible

(max. 7.800 mm Do, 38 mm thick
up to 1.500 mm Do, increase in thickness possible)
 
Flat head

h1 >= 3,5 x s
r = 15 - 50 mm - on request > 50 mm
h3 = h1 + h2

(max. 7.000 mm Do and 38 mm thick)
 
Plate-type head

R = Di
h2 = 0,134 x Di

(max. 7.000 mm Do, 38 mm thick
up to 1.500 mm Do, and 40 mm thick - hot formed)
 
Diffuser head

R >= Do
r = max. 100 mm
h1 >= 3,5 x s

(max. 7.000 mm Do, 38 mm thick)
 
Cone

on request
 
Special pressings

(can be individually manufactured to your requirements; cold or hot formed)
 
Ellipsoidal head

Form 2:1
Di = Do - 2 x s
R = 0,9 x Di
r = 0,17 x Di
h1 = as per specification
h2 = 0,25 x Di
h3 = h1 + h2

Form 1,9:1 on request possible

(max. 6.200 mm Do, 38 mm thick)
 
Oval standard inspection and manhole covers  
   
80 x 120 mm
100 x 150 mm
150 x 250 mm
   
Inspection / Manhole covers
(with pressed or flat covers)

220 x 320 mm

300 x 400 mm
320 x 420 mm
350 x 450 mm