Ductile cast iron pipe is a pipe type preferred in main transmission lines since it has superior properties such as corrosion strength and abrasion resistance as it is made of cast iron, as well as being able to stretch without deformation. In regions where the temperature is low, freezing frequently occurs on the main transmission lines, especially in winter. Such problems can be avoided by using pre-insulated geothermal ductile iron pipes.
Technical Specifications
|
General Design |
ISO 2351 TS EN 545 EN 598 |
|
Pipe Socket and Gasket |
DIN 28603 EN681-1 |
|
Flange Sizes |
EN 1092-2 ISO 7005-2 BS 4504 DIN 2501 |
|
Internal Coating |
ISO 4179 |
|
External Coating |
ISO 8179 |
|
Polyethylene Coating(Optional) |
ISO 8180 |
Rigid polyurethane foam is an insulation material with an extremely low thermal transmission coefficient, consisting of the mixing of polyol and isocyanate in certain ratios and pressure injection of these materials. PUR, which is injected between the carrier pipe and the casing pipe (HDPE), provides heat insulation as well as enables two pipes to operate as one pipe by bonding them together and filling in the space between the pipes longitudinally. In the manufacturing of pre-insulated geothermal pipes, the PUR in accordance with the standard TS EN 253 has to meet the following minimum requirements:
Technical Specifications
|
Components |
Polyol and Isocyanate |
|
Minimum cellular mass density |
55 kg/m3 ISO 845 |
|
Max. Thermal Conductivity Coefficient |
0,029 W/mK ISO 8497 |
|
Average cell structure |
< 0,5 mm |
|
Closed cell content |
> %88 ISO 4590 |
|
Min. Radial Compressive Strength |
0,30 MPa ISO 844 |
|
Water absorption at high temperature |
< 10% when tested according to TS EN 253 5.3.5 |
|
Axial cutting strength |
23 °C ± 2 °C ≥ 0,12 N/mm² |
|
140 °C ± 2 °C ≥ 0,08 N/mm² |
|
|
Temperature range |
-50 °C / +148 °C |
|
Impact strength |
No damage must exist - when tested in accordance with EN 253 5.4.5 |
|
Linear Water Tightness |
Must be Watertight When tested in accordance with EN 253 5.4.6 |
|
Chlorofluorocarbon |
None |
|
Service life of insulation according to continuous service temperature |
3 years at 140 ˚C |
|
30 years at 120 ˚C |
|
|
50 years at 115 ˚C |
Extruded polyethylene casing pipe is used on the outermost part, which protects the insulation material from external factors and chemicals. The HDPE casing pipe manufactured in accordance with the standards TS EN 253 and TS EN 12201-2 must contain antioxidants, UV stabilizers and carbon black.
|
Standard |
EN 253, EN 12201-2 |
|
Dimensions |
EN 253 part4.3.2.2 table 5 |
|
Material |
PE 80 – PE 100 ISO 9080 |
|
Density |
> 944 kg/m3 ISO 1133 |
|
Thermal Conductivity Coefficient |
0,43 W/mK |
|
Thermal Stability (OIT) |
> 20 min (210 °C) ISO 11357-6 |
|
Temperature Range |
40 °C / + 80 °C |
|
Cracking resistance under stress |
> 300 hrs (4 MPa, 80 °C) ISO 16770 |
|
Post-thermal treatment changes |
<%3 (no damage must exist) ISO 2505 |
|
Melt Flow Index (MFI 190°C/5kg) |
0,2 < MFR ≤ 1,0 g/10dk ISO 1133 |
|
Carbon black content |
> by mass % 2,5 ± 0,5 ISO 6964 |
|
Carbon black propagation degree |
<3 ISO 18553 |
|
Breaking elongation |
>% 350 ISO 6259-1 |
|
Hydrostatic Strength |
10,8 bar 80°C 165 sa ISO 1167-1-2 |
|
Inner surface treatment |
Corona process on extruded line (on-line) |
|
UV Protection |
yes |
| PRODUCT NOMINAL SIZE | DUCTILE PIPE | HDPE CASING PIPE | PUR | PIPE LENGTH | INSULATED PIPE WEIGHT (kg/m) | ||||||
| DN | INCH | Outer Diameter dₐ (mm) | Wall Thickness t (mm)**** | kg/m | Outer Diameter D (mm) | Wall Thickness s (mm) | Inner Diameter (mm) | Thickness (mm) | L (mt) | ||
| Ø 80/200 | 80 | 3" | 98 | 6,00 | 12,20 | 200 | 3,2 | 193,6 | 47,8 | 6 | 15,78 |
| Ø 100/250 | 100 | 4" | 118 | 6,10 | 15,10 | 250 | 3,6 | 242,8 | 62,4 | 6 | 20,52 |
| Ø 125/280 | 125 | 5" | 144 | 6,20 | 18,90 | 280 | 3,9 | 272,2 | 64,1 | 6-12 | 25,41 |
| Ø 150/315 | 150 | 6" | 170 | 6,30 | 22,80 | 315 | 4,1 | 306,8 | 68,4 | 6-12 | 30,63 |
| Ø 200/355 | 200 | 8" | 222 | 6,30 | 33,51 | 355 | 4,5 | 346,0 | 62 | 6-12 | 42,59 |
| Ø 250/400 | 250 | 10" | 274 | 6,80 | 40,20 | 400 | 4,8 | 390,4 | 58,2 | 6-12 | 50,69 |
| Ø 300/450 | 300 | 12" | 326 | 7,20 | 50,80 | 450 | 5,2 | 439,6 | 56,8 | 6-12 | 63,14 |
| Ø 350/500 | 350 | 14" | 378 | 7,70 | 63,20 | 500 | 5,6 | 488,8 | 55,4 | 6-12 | 77,53 |
| Ø 400/560 | 400 | 16" | 429 | 8,10 | 75,50 | 560 | 6,0 | 548,0 | 59,5 | 6-12 | 93,03 |
| Ø 450/630 | 450 | 18" | 480 | 8,60 | 89,90 | 630 | 6,6 | 616,8 | 68,4 | 6-12 | 111,89 |
| Ø 500/710 | 500 | 20" | 508 | 9,00 | 110,75 | 710 | 7,2 | 695,6 | 93,8 | 6-12 | 140,24 |
| Ø 600/800 | 600 | 24" | 610 | 9,90 | 146,50 | 800 | 7,9 | 784,2 | 87,1 | 6-12 | 180,76 |
| Ø 700/900 | 700 | 28" | 711 | 10,80 | 186,48 | 900 | 8,7 | 882,6 | 85,8 | 6-12 | 227,20 |
| Ø 800/1000 | 800 | 32" | 812,8 | 11,70 | 231,13 | 1000 | 9,4 | 981,2 | 84,2 | 6-12 | 278,21 |
| Ø 900/1100 | 900 | 36" | 914 | 12,60 | 280,08 | 1100 | 10,2 | 1079,6 | 82,8 | 6-12 | 334,63 |
| Ø 1000/1200 | 1000 | 40" | 1016 | 13,50 | 333,74 | 1200 | 11,0 | 1178,0 | 81 | 6-12 | 395,66 |
| Ø 1200/1400 | 1200 | 48" | 1219 | 14,40 | 427,76 | 1400 | 12,5 | 1375,0 | 78 | 6-12 | 505,76 |
- Non-insulated pipe ends will have a length of 150 - 250 mm ±10 mm.
- Upon request, manufacturing can be made in lengths, diameters and insulation thicknesses different from the values in the table.
- Our company reserves the right to make changes on this and all other data in the brochures, written documentation and on our website. You may contact our company for getting up-to-date information.
- The outer diameter, wall thickness and unit weight of the ductile pipe are based on the K9 production standard. The values may vary in different production standards.
