Steel pipes with polyurethane foam heat isolation with a storage casing is a hard construction «a pipe in a pipe». They are designed for underground laying of a heat supply system (in a polyethylene mantle – by a duct-free method, with a sheet galvanized steel mantle – in a walkway or a tunnel) and overground laying of heat supply systems (for pipes with a sheet galvanized steel mantle) with the following calculated parameters of the heat carrier: operating pressure not more than 1,6 MPa and temperature not more than 140° C within the graph of ratio governing of heat supply 150° C – 70°C.
Also it is acceptable to use isolated pipes for pipe-lines transporting different materials (oil, gas, etc.).
| Outer diameter and minimum thickness of steel pipe wall* d, mm |
Gal mantle |
|
|
D, mm |
S, mm |
|
| 32х3,0 | 140 | 53,45 |
| 38х3,0 | 140 | 50,45 |
| 45х3,0 | 140 | 46,95 |
| 57х3,0 | 140 | 40,95 |
| 76х3,0 | 160 | 41,45 |
| 89х4,0 | 180 | 44,95 |
| 108х4,0 | 200 | 45,4 |
| 133х4,0 | 225 | 45,4 |
| 159х4,5 | 250 | 44,8 |
| 219х6,0 | 315 | 47,3 |
| 273х7,0 | 400 | 62,7 |
| 325х7,0 | 450 | 61,7 |
| 426х7,0 | 560 | 66 |
| 530х7,0 | 675 | 71,5 |
| 630х8,0 | 775 | 71,5 |
|
720х8,0 |
875 | 76,5 |
| 820х9,0 | 975 | 76,5 |
| 920х10,0 | 1075 | 77,5 |
| 1020х11,0 | 1175 | 76,5 |
An example of the type codes in the ordered specification:
The steel pipe of outer diameter 108 mm, with thickness of pipe wall 4 mm, with isolation of type 2 from polyurethane foam in polyethylene casing:
- Pipe St108*4-2-PUF-PEM
The steel pipe of outer diameter 108 mm, with thickness of pipe wall 4 mm, with isolation from polyurethane foam in galvanized casing:
- Pipe St108*4-PUF-GalM
Note:
The weight of products is introduced according to the recommended National State Standard 30732-2006 of the thickness of steel pipe wall.
