AVKO

PRE-INSULATED PIPE SYSTEMS FOR DISTRICT HEATING NETWORKS


Pre-insulated piping system for INDUSTRIAL PURPOSES
FOR ABOVE GROUND INSTALLATION

PRE-INSULATED PIPE INDUSTRIAL APPLICATION, ABOVE GROUND INSTALLATION

PRE-INSULATED PIPE

DN        – Nominal diameter

d          – Steel pipe outside diameter (mm)

D          – HDPE casing pipe outside diameter (mm)

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

V          -Volume of water (l/m)

L          – Standard length (m)

Other sizes – on request and upon discussion.

DN

d

Range 150-180оС

Range 180-210оС

Range 210-240оС

V

L

D

P

D

P

D

P

mm

mm

kg/m

mm

kg/m

mm

kg/m

l/m

m

25

33,7

140

5.3

140

6.1

-

-

0.6

6

32

42,4

160

7.0

160

7.7

-

-

1.1

12

40

48,3

160

8.4

160

7.9

200

10.4

1.5

12

50

60,3

180

9.4

180

10.0

200

11.8

2.3

12

65

76,1

200

11.2

200

11.9

225

14.4

3.9

12

80

88,9

200

12.8

225

14.8

250

16.2

5.4

12

100

114,3

250

18.1

250

19.1

280

22.1

9.0

12

125

139,7

250

20.3

280

22.9

315

28.0

13.8

12

150

168,3

280

25.9

315

29.0

355

34.9

20.2

12

200

219,1

355

37.3

355

38.9

400

46.1

34.7

12

250

273,0

400

49.0

400

50.6

500

65.5

54.3

12

300

323,9

450

62.4

450

64.4

560

82.2

76.8

12

 

Raw materials

Carrier steel pipe is manufactured acc.:

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

- EN 10220 – steel pipes sizes

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

 

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.

 

Thermo-insulation shell

The used thermo-insulation shell is mineral wool with the following characteristics:

Използваните топлоизолационни черупки са изработени от минерална вата със следните свойства:

Heat conductivity coefficient     – 0,034 W/mK

Work temperature                          – до 700°С

Density                                                – 120-150 kg/m³