Pre-insulated pipe is a single structure consisting of the main steel pipe (black steel pipe or galvanized steel pipe), heat-insulating polyurethane foam layer and galvanized or polyethylene mantle pipe.
“SarmatTermoEngineering” construction company (subsidiary of “Sarmat” holding company) manufactures:
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“SarmatTermoEngineering” construction company (subsidiary of “Sarmat” holding company) manufactures pre-insulated pipes and shaped objects with metal mantel (galvanized steel) for above-ground pipelining and pipes with polyethylene mantel for underground pipelining. |
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Benefits of PI-pipes (in comparison with usual pipes): |
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Reduction of heat loss (from 45% to 2%) |
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Reduction of annual operational costs for pipeline maintenance (in 9-10 times) |
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Increased service life (up to 30 years) |
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Reduction of costs for current pipeline maintenance (in 3 times) |
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The quality of PI-pipe manufactured by “SarmatTermoEngineering” construction company (subsidiary of “Sarmat” holding company) is provided by high-quality completion materials and manufacturing process. The manufacture of PUF insulation requires adherence to many parameters: temperature conditions, components gauging and ratio, preparatory treatment of pipe and polyethylene sheath. |
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The following pipes are used in the pre-insulated pipeline systems:
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With polyethylene sheath: |
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Black pipe with polyethylene sheath - ÏÝÍÄ |
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It is used for heating systems, laid under ground |
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Nominal size and weight of PI-pipes for underground pipelining
(main pipe – black, steel; mantel pipe - polyethylene)
Nominal size
of PI-pipes
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Steel pipe parameters |
Parameters of polyethylene mantel pipe |
Weight of 1 ì.ï.
PI-pipe, kg
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Outer diameter
d, mm
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Minimal wall
thickness
Smin, mm |
Outer diameter
d, mm
|
Wall thickness
S, mm
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| 38/110
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38
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3,0
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110
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2,5
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3,8
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| 45/110
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45
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3,0
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110
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2,5
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4,2
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| 57/125
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57
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3,5
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125
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2,5
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6,5
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| 76/140
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76
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3,5
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140
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3,0
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8,5
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| 89/160
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89
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4,0
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160
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3,0
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10,1
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| 108/200
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108
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4,0
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200
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3,2
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14,3
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| 114/200
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114
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4,0
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200
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3,2
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14,8
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| 133/225
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133
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4,0
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225
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3,5
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17,6
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| 159/250
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159
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4,5
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250
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3,9
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22,5
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| 219/315
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219
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6,0
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315
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4,9
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39,9
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| 273/400
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273
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7,0
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400
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6,3
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59,7
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| 325/450
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325
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8,0
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450
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7,0
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79,0
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| 377/500
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377
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9,0
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500
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7,8
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101,1
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| 426/560
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426
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7,0
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560
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8,8
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96,5
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Galvanized pipe with polyethylene sheath - Ö ÏÝÍÄ |
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It is used for hot water supply systems, laid under ground. |
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Nominal size and weight of PI-pipes for underground pipelining
(main pipe – galvanized, steel; mantel pipe - polyethylene)
| Nominal size of PI-pipes
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Galvanized steel pipe parameters
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Mantel pipe parameters |
Weight of 1 ì.ï. PI-pipe, kg
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| Nominal inside diameter d, mm
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Outer diameter d, mm
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Minimal wall thickness Smin, mm
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Polyethylene
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| Outer diameter d, mm
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Wall thickness S, mm
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| 25/90
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25
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33,5
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3,2
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90
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2,2
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3,4
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| 32/110
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32
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42,3
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3,2
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110
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2,5
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4,8
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| 40/110
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40
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48,0
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3,5
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110
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2,5
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5,4
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| 50/125
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50
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60
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3,5
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125
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2,5
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6,8
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| 65/140
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65
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76
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4,0
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140
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3,0
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9,3
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| 80/160
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80
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89
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4,0
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160
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3,0
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11,2
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| 100/200
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100
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114
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4,0
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200
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3,2
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14,8
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| 125/255
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125
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140
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4,5
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200
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3,5
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17,6
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| 150/250
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150
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165
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4,5
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225
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3,9
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22,5
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With galvanized sheath: |
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Black pipe with galvanized sheath - ÎÑ |
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It is used for hot water supply systems, laid under ground. |
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Nominal size and weight of PI-pipes for above-ground pipelining
(main pipe – black, steel; mantel pipe – galvanized, steel)
Nominal size
of PI-pipes
|
Steel pipe parameters |
Parameters of polyethylene mantel pipe
|
Weight of 1 ì.ï. PI-pipe, kg
|
| Outer diameter d, mm
|
Minimal wall thickness Smin, mm
|
Outer diameter d, mm
|
Wall thickness S, mm
|
| 38/110
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38
|
3,0
|
110
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2,5
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4,8
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| 45/110
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45
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3,0
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110
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2,5
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5,2
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| 57/125
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57
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3,5
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125
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2,5
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7,8
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| 76/140
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76
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3,5
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140
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3,0
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9,8
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| 89/160
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89
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4,0
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160
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3,0
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11,5
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| 108/200
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108
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4,0
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200
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3,2
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15,8
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| 114/200
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114
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4,0
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200
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3,2
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16,3
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| 133/225
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133
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4,0
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225
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3,5
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19,1
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| 159/250
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159
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4,5
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250
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3,9
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24,3
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| 219/315
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219
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6,0
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315
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4,9
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40,8
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| 273/400
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273
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7,0
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400
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6,3
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59,5
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| 325/450
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325
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8,0
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450
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7,0
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77,1
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| 377/500
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377
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9,0
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500
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7,8
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97,2
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| 426/560
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426
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7,0
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560
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8,8
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91,2
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Galvanized pipe with galvanized sheath - Ö ÎÑ |
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It is used for hot water supply systems, laid above ground |
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Nominal size and weight of PI-pipes for underground pipelining
(main pipe – galvanized, steel; mantel pipe – galvanized, steel)
| Nominal size of PI-pipes
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Galvanized steel pipe parameters
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Mantel pipe parameters
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Weight of 1 ì.ï. PI-pipe, kg
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| Nominal inside diameter d, mm
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Outer diameter d, mm
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Minimal wall thickness Smin, mm
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Polyethylene
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| Outer diameter d, mm
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Wall thickness S, mm
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| 25/90
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25
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33,5
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3,2
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90
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2,2
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4,6
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| 32/110
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32
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42,3
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3,2
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110
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2,5
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5,8
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| 40/110
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40
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48,0
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3,5
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110
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2,5
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6,7
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| 50/125
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50
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60
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3,5
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125
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2,5
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8,2
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| 65/140
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65
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76
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4,0
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140
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3,0
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10,6
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| 80/160
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80
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89
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4,0
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160
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3,0
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12,8
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| 100/200
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100
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114
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4,0
|
200
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3,2
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16,6
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| 125/255
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125
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140
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4,5
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200
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3,5
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19,1
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| 150/250
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150
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165
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4,5
|
225
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3,9
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24,3
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Application of PI-pipes manufactured by “SarmatTermoEngineering”: |
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Underground and above-ground pipelining of heat and utility networks |
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Heat and cold insulation of industrial pipelines, steam condensers, pipelines for chemical water cleaning, mazout lines and so on with temperature range +25 - +130°C˚Ñ (at special order – up to +400°C˚Ñ). |
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Application of PI-pipes manufactured by “SarmatTermoEngineering” is regulated by: |
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STB (National Standard of the Republic of Belarus) 1295-2001 Steel pipes pre-insulated with polyurethane foam; |
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Construction Norms and Regulations 2.04.07-86 Heat networks; |
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Construction Norms and Regulations 2.04.14-88 Heat insulation of equipment and pipelines; |
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Construction Norms and Regulations 3.05.03-85 Heat networks. |
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Every set of PI-pipe shaped parts manufactured by “SarmatTermoEngineering” passes acceptance testing in special accredited laboratory for compliance with STB (National Standard of the Republic of Belarus) 1295-2001 standards and technical requirements of manufacturer. |
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All practical questions of designing PI - pipeline systems are covered in “Sarmat” Ltd. publications:
“Recommendations for PI -pipeline designing” |
“Catalogue of pre-insulated pipes manufactured by “SarmatTermoEngineering” |
“Manual for system assemblage of pre-insulated with foam polyurethane pipelines of nominal size 25/90-630/800” |
“Manual for designing, assemblage and operating of ROM system” |
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You can ask a question to get additional information about application of “SarmatTermoEngineering” pre-insulated pipeline systems. |
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