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PORTHOLE EXTRUDED ALUMINIUM TUBES

THE STANDARD PROCESS FOR THE PRODUCTION OF EXTRUDED PROFILES

Porthole extrusion is the standard process for the production of extruded hollow profiles and tubes. The production of porthole extruded aluminium tubes is limited to a certain number of alloys. In most cases, the standard alloys EN AW-6060 or EN AW-6082 are used. But also other – mainly low alloyed aluminium alloys – are possible.

Porthole extruded aluminium tubes are very often an alternative with lower production requirements. For small dimensions, a multichamber die is often used. Further advantages arise in contrast to seamless extrusion due to differences in the processes. By means of specially designed extrusion dies, we produce tubes – with larger outside diameters or also with a larger ratio of outside diameter to wall thickness – by porthole extrusion.

Porthole extruded aluminium tubes, like seamless tubes, may be further processed by drawing.

PORTHOLE EXTRUSION – SIMPLY EXPLAINED

Porthole extrusion of aluminium

TABLE OF MEASUREMENTS

Porthole extruded aluminium tubes

1,5

2

3

5

6

7

10

15

20

25

30

11

x

14

x

x

15

x

x

x

18

x

x

x

x

x

20

x

x

x

x

x

x

30

x

x

x

x

x

x

x

40

x

x

x

x

x

x

x

x

80

x

x

x

x

x

x

x

x

x

90

x

x

x

x

x

x

x

x

x

x

140

x

x

x

x

x

x

x

x

x

x

x

160

x

x

x

x

x

x

x

x

x

x

230

x

x

x

x

x

x

x

x

260

x

x

x

x

x

x

x

290

x

x

x

x

x

320

x

x

x

x

355

x

x

x

Vertical: Diameter in mm, horizontal: Wall thickness in mm

Porthole extruded and drawn aluminium tubes

0,5

0,75

1

1,25

1,5

2

3

4

5

6

8

10

12

16

20

25

5

x

x

x

8

x

x

x

x

x

10

x

x

x

x

x

x

x

12

x

x

x

x

x

x

x

14

x

x

x

x

x

x

x

x

16

x

x

x

x

x

x

x

x

x

20

x

x

x

x

x

x

x

x

x

x

25

x

x

x

x

x

x

x

x

x

x

x

40

x

x

x

x

x

x

x

x

x

x

x

x

x

60

x

x

x

x

x

x

x

x

x

x

x

x

x

x

70

x

x

x

x

x

x

x

x

x

x

x

x

x

x

100

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

160

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

180

x

x

x

x

x

x

x

x

x

x

x

x

x

x

200

x

x

x

x

x

x

x

x

x

x

x

220

x

x

x

x

x

x

x

x

x

x

250

x

x

x

x

x

x

x

x

280

x

x

x

x

x

x

310

x

x

x

x

x

340

x

x

Vertical: Diameter in mm, horizontal: Wall thickness in mm