AVKO

PRE-INSULATED PIPE SYSTEMS FOR DISTRICT HEATING NETWORKS


Pre-insulated piping system for CENTRALIZED DISTRICT HEATING
FOR ABOVE GROUND INSTALLATION

PRE-INSULATED PIPE FOR ABOVE GROUND INSTALLATION

PRE-INSULATED PIPE FOR ABOVE GROUND INSTALLATION PRE-INSULATED PIPE FOR ABOVE GROUND INSTALLATION

DN - Nominal diameter

d - Steel pipe outside diameter (mm)

S* - Wall thickness of the steel pipe (mm) – conforming to the standard minimum according to the base norm EN 253.

D - Outside diameter of casing pipe (mm)

P - Weight of the pre-insulated pipe (kg/m)

V - Water volume (l/m)

L - Standard length (m)

DN

d

S*

D

P

V

L

mm

mm

mm

kg/m

l/m

m

20

26,9

2,0

100

3,1

0,4

6

25

33,7

2,3

100

4,2

0,6

6

32

42,4

2,6

100

4,3

1,1

6/12

40

48,3

2,6

100

5,0

1,5

6/12

50

60,3

2,9

125

6,8

2,3

6/12

65

76,1

2,9

140

8,6

3,9

6/12

80

88,9

3,2

160

10,0

5,4

6/12

100

114,3

3,6

200

14,6

9,0

6/12

125

139,7

3,6

225

17,4

13,8

6/12

150

168,3

4,0

250

22,1

20,2

6/12

200

219,1

4,5

315

30,1

34,7

6/12

250

273,0

5,0

400

42,9

54,3

6/12

300

323,9

5,6

450

55,3

76,8

6/12

 

Raw materials

Carrier steel pipe is manufactured acc.:

- EN 10216-2 or another equivalent norm regarding seamless pipes, steel grade P235GH .

- EN 10217-1 another equivalent norm regarding longitudinally welded pipes, steel grade P235TR1/TR2

- EN 10217-2 another equivalent norm regarding longitudinally welded pipes, steel grade P235GH

- EN 10217-5 another equivalent norm regarding spirally welded pipes, steel grade P235GH

- EN 10220 – steel pipes sizes

Pipe ends are bevelled in order to facilitate welding acc. ISO 6761.

During production, the quality of the welding seam is monitored constantly visually and through non-destructive testing. Finished pipes are subjected to hydro-static testing at 80 bar per 5 sec.

 

 

Casing pipe

The casing pipe is manufactured from spirally wound galvanized steel sheet with thickness 0.6 mm. The zinc coating is with thickness 140 μm. The finished product conforms to  EN 1506.

 

Polyurethane system

AVKO jsc is using polyurethane system with foaming agent cyclopentane. The resulting PUR foam is characterized with very low heat conductivity coefficient  < 0,027 W/mK.