HEATING MAIN MONTAGE INSTRUCTIONS CV4.04
2. TRENCH EXCAVATION AND PIPE PLACEMENT
Industrially coated heating main construction works should be carried out according to
design documentation and ”Poliurs” Ltd. heating main assembling direction CV4.04.
Installation work personnel should be trained and certified, according to existing safety
requirements.
A. Trench cross section of two-way pipe system
B. Double pipe trench
Two-way pipe system trench cross section suggested dimensions:
PE casing
øD, mm
Distance between
pipes
е
, mm
Trench base
width
А
min
, m
Trench depth
Н
, m
90
150
0.7
0.65
110
150
0.7
0.65
125
150
0.7
0.65
140
150
0.8
0.65
160
150
0.8
0.70
180
150
0.9
0.70
200
150
0.9
0.75
225
200
1.0
0.80
250
200
1.1
0.80
280
200
1.1
0.85
315
200
1.2
0.90
355
200
1.3
0.90
400
200
1.4
1.00
450
200
1.5
1.00
500
200
1.6
1.10
560
200
1.8
1.20
630
200
2.0
1.30
710
250
2.2
1.40
800
250
2.4
1.50
900
300
2.7
1.70
1000
300
3.0
1.80
Pipe depth shall be chosen depending on surface loads, construction technology and
public utility network location, possible ground agricultural cultivation etc.
2.1.
