Pre-insulated piping system for CENTRALIZED DISTRICT HEATINGFOR ABOVE GROUND INSTALLATION
PRE-INSULATED ELBOW 90°, 45° FOR ABOVE GROUND INSTALLATION
|
DN |
d |
D |
L 90o |
L 45o |
|
mm |
mm |
mm |
mm |
mm |
|
20 |
26,9 |
100 |
250 |
200 |
|
25 |
33,7 |
100 |
250 |
200 |
|
32 |
42,4 |
100 |
280 |
200 |
|
40 |
48,3 |
100 |
280 |
200 |
|
50 |
60,3 |
125 |
330 |
250 |
|
65 |
76,1 |
140 |
430 |
250 |
|
80 |
88,9 |
160 |
470 |
300 |
|
100 |
114,3 |
200 |
530 |
300 |
|
125 |
139,7 |
225 |
590 |
300 |
|
150 |
168,3 |
250 |
650 |
350 |
|
200 |
219,1 |
315 |
570 |
350 |
|
250 |
273,0 |
400 |
640 |
450 |
|
300 |
323,9 |
450 |
720 |
450 |
DN - Nominal diameter
d - Steel pipe outside diameter (mm)
D - Outside diameter of casing pipe (mm)
L – Length of the elbow arms (mm)
Bending radius:
- Welded elbows R = 1,5 d
- Cold bent elbows R = 2,5 d
Other sizes – on request and upon discussion.
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.