AVKO

PRE-INSULATED PIPE SYSTEMS FOR DISTRICT HEATING NETWORKS


FOR DIRECT BURIAL
Pre-insulated piping system for CENTRALIZED DISTRICT HEATING

PRE-INSULATED T-PIECE ANGULAR

PRE-INSULATED T-PIECE ANGULAR PRE-INSULATED T-PIECE ANGULAR

DN1, DN2 - Nominal diameter (mm)

d1, d2 - Steel pipe outside diameter (mm)

D1, D2 - Casing PE pipe outside diameter (mm)

L1, L2 – Length (mm)

Other sizes – on request.

 

 

 

 

DN1

20

25

32

40

50

65

80

100

125

150

200

250

300

350

400

 

 

 

d1

26,9

33,7

42,4

48,3

60,3

76,1

88,9

114,3

139,7

168,3

219,1

273,0

323,9

355,6

406,4

 

 

 

D1

90

90

110

110

125

140

160

200

225

250

315

400

450

500

560

 

 

 

L1

1000

1000

1000

1000

1000

1000

1500

1500

1500

1500

1500

2000

2000

2000

2000

DN2

d2

D2

L2

 

20

26,9

90

1000

x

x

x

x

x

25

33,7

90

1000

x

x

x

x

x

x

x

32

42,4

110

1000

x

x

x

x

x

x

40

48,3

110

1000

x

x

x

x

x

 

 

 

 

 

 

50

60,3

125

1000

x

x

x

x

x

x

 

 

 

 

 

65

76,1

140

1000

x

x

x

x

x

 

 

 

 

 

80

88,5

160

1000

x

x

x

x

x

 

 

 

 

100

114,3

200

1000

x

x

x

x

x

 

 

 

125

139,7

225

1000

x

x

x

x

x

 

 

150

168,3

250

1200

x

x

x

x

x

 

200

219,1

315

1200

x

x

x

x

x

250

273,0

400

1500

 

x

x

x

x

300

323,9

450

1500

 

 

x

x

x

350

355,6

500

1500

 

 

 

x

x

400

406,4

560

1500

 

 

 

 

x

 

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.

 

HDPE Casing pipe

Otside casing pipe is manufactured from high-density polyethilene with added antioxidants, UV stabilizers and carbon black.

Internal surface of PE pipes is processed with Corona treatment in order to achieve better adhesion with PUR foam.

 

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.