Questions & Answers
Steel grades of insulated steel pipes
According to GOST 19281-2014 standards: 17G1S-U, 10G2S1, 17G1S, 09G2S.
According to GOST 1050-2013 standards: 35, 10, 20, 45.
According to heating network pipe standards (GOST 8732-78 / GOST 10704-91): St3ps, St3sp, St3, St2.
According to European EN standards: E355, P265GH, E235, P265GH.
Standards for insulated steel pipes
International ISO standards:
ISO 12944;
ISO 21809.
Ukrainian standards (DSTU):
DSTU EN 253;
DSTU B V.2.5-31:2007.
Standards for basic steel pipes (used for insulation):
GOST 8731-74;
GOST 8732-78;
GOST 10705-80;
GOST 10704-91.
European standards:
EN 489;
EN 488;
EN 448;
EN 253.
Table for calculating the weight of 1 meter of thermally insulated steel pipes
| Outer diameter of steel pipe, mm | Shell diameter (PE/OC), mm | Weight of 1 meter of pipe in polyurethane foam insulation, kg |
| 32 | 90 | 3,5 - 5,0 |
| 57 | 125 | 6,5 - 9,0 |
| 76 | 140 | 8,5 - 12 |
| 89 | 160 | 11 - 15 |
| 108 | 200/225 | 15 - 20 |
| 133 | 225/250 | 19 - 25 |
| 159 | 250/280 | 25 - 35 |
| 219 | 315/355 | 40 - 55 |
| 273 | 400/450 | 55 - 75 |
| 325 | 450/500 | 70 - 95 |