GRE (Glass Reinforced Epoxy) Pipe
GRE pipe is resistant to the abrasive effects of caustic substances and acid concentrations due to its chemical composition. For this reason, it is used in fire, drinking water and cooling water transmission lines, power plants and industrial wastewater systems.
GRP (Glass Reinforced Polyester) Pipe
GRP pipe is a type of pipe that does not corrode, has an insulating feature, and can operate in a wide range of pH. Drinking water and clean water transmission lines, piping lines of chemical plants and circulation lines of power plants are among the prominent areas of use of these pipes.
The production standards and norms of GRE and GRP pipes are as follows.
|
Production Standards |
|
TS EN 14364 |
|
ISO 10639:2017 |
|
ASTM D3262 |
|
ASTM D3517-19 |
Rigid polyurethane foam is an insulation material with an extremely low thermal transmission coefficient, consisting of mixing 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 enabling 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 pipes, the PUR in accordance with the standard TS EN 253 has to meet the following minimum requirements:
|
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 |
|
The 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 sheath pipe is used to protect the insulation material from external factors and chemicals. HDPE casing pipe produced according to TS EN 253 and TS EN 12201-2 standards should contain anti-oxidants, UV stabilisers and carbon black.
|
Standard |
EN 253, EN 12201-2 |
|
Dimensions |
EN 253 part 4.3.2.2 table5 |
|
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) |
|
UVProtection |
Yes |
| PRODUCT NOMINAL SIZE | GRE & GRP CARRIER PIPE**** | HDPE CASING PIPE | PUR | ||||
| DN | Outer Diameter dₐ (mm) | kg/m | Outer Diameter D (mm) | Wall Thickness s (mm) | Inner Diameter (mm) | Thickness (mm) | |
| Ø 25/90 | 25 | 30,2 | 0,11 | 90 | 3,0 | 84,0 | 26,9 |
| Ø 40/110 | 40 | 45,2 | 0,17 | 110 | 3,0 | 104,0 | 29,4 |
| Ø 50/110 | 50 | 55,2 | 0,27 | 110 | 3,0 | 104,0 | 24,4 |
| Ø 65/125 | 65 | 71,4 | 0,43 | 125 | 3,0 | 119,0 | 23,8 |
| Ø 80/160 | 80 | 86,4 | 0,67 | 160 | 3,0 | 154,0 | 33,8 |
| Ø 100/200 | 100 | 106,8 | 1,05 | 200 | 3,2 | 193,6 | 43,4 |
| Ø 125/225 | 125 | 131,8 | 1,47 | 225 | 3,4 | 218,2 | 43,2 |
| Ø 150/250 | 150 | 157,8 | 2,12 | 250 | 3,6 | 242,8 | 42,5 |
| Ø 200/315 | 200 | 209,8 | 3,14 | 315 | 4,1 | 306,8 | 48,5 |
| Ø 250/400 | 250 | 261,8 | 6,33 | 400 | 4,8 | 390,4 | 64,3 |
| Ø 300/450 | 300 | 313,5 | 6,67 | 450 | 5,2 | 439,6 | 63,05 |
| Ø 350/500 | 350 | 365,5 | 10,40 | 500 | 5,6 | 488,8 | 61,65 |
| Ø 400/560 | 400 | 412 | 16,20 | 560 | 6,0 | 548,0 | 68 |
| Ø 450/630 | 450 | 463 | 25,60 | 630 | 6,6 | 616,8 | 76,9 |
| Ø 500/710 | 500 | 514 | 41,30 | 710 | 7,2 | 695,6 | 90,8 |
| Ø 600/800 | 600 | 616 | 52,30 | 800 | 7,9 | 784,2 | 84,1 |
| Ø 700/900 | 700 | 718 | 900 | 8,7 | 882,6 | 82,3 | |
| Ø 800/1000 | 800 | 820 | 1000 | 9,4 | 981,2 | 80,6 | |
| Ø 900/1100 | 900 | 922 | 1100 | 10,2 | 1079,6 | 78,8 | |
| Ø 1000/1200 | 1000 | 1024 | 1200 | 11,0 | 1178,0 | 77 | |
| Ø 1100/1400 | 1100 | 1126 | 1400 | 12,5 | 1375,0 | 124,5 | |
| Ø 1200/1400 | 1200 | 1228 | 1400 | 12,5 | 1375,0 | 73,5 | |
- 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 wall thicknesses and unit weights of GRE & GRP carrier pipes may vary.
