aquatherm blue: piping system for heating, cooling and fan coil lines
aquatherm blue is a corrosion-resistant polypropylene (fusiolen PP-RCT) piping system developed for closed-circuit heating and cooling systems and technical pipe networks. Typical uses are chilled water and heating lines in building services and industrial buildings, and liquid cooling in data centres.
- 20–630 mm diameter range
- Oxygen-barrier OT option
- 10-year manufacturer's warranty
- Push-fit 90–450 mm
None of the problems of metal pipe in closed circuits
Corrosion-resistant polypropylene: MF RP variants in fusiolen PP-RCT, S and SDR 7.4 MF variants in fusiolen PP-R. Unlike steel and copper, the material does not degrade in service and forms no rust or deposits.
No corrosion or deposits
Rust and sludge from steel pipe clog fan coil coils and valves; polypropylene does not degrade in service and forms no deposits.
Self-insulating
Thermal conductivity 0.15 W/mK: thinner thermal and anti-condensation insulation than on metal pipe.
Low expansion with glass fibre
In MF and MF RP series, linear expansion is at least 75% lower than in standard PP pipe; the expansion coefficient is close to that of metal pipe.
Light and quick to install
For roughly 30 m of pipe: blue 7.44 kg, copper 13.5 kg, steel 48 kg (same nominal size; manufacturer's US data).
Oxygen barrier (OT)
Protects metal components such as pumps, valves and heat exchangers in closed heating circuits from oxygen diffusion (DIN 4726).
One-piece joints
Pipe and fitting are fused (heated-tool socket, butt or electrofusion welding) into a homogeneous, material-bonded single piece with no additional sealing point. Push-fit connection is an alternative in large diameters.
Made in Germany (Attendorn, Ennest, Radeberg) — catalogue: "100% Made in Germany". Images and technical data: aquatherm GmbH (aquatherm.de, aquatherm blue technical catalogue 2026). Values are as published by the manufacturer; the current catalogue governs project calculations.
aquatherm blue variants
SDR (standard dimension ratio) is the ratio of outside diameter to wall thickness. The lower the SDR, the thicker the wall and the higher the pressure rating.
| Variant | SDR | Diameter (mm) | Material | Structure |
|---|---|---|---|---|
| S | SDR 11 / SDR 7.4 (product page) | 20–32 | fusiolen PP-R | Single layer |
| MF | SDR 7.4 | 20–25 | fusiolen PP-R / PP-RCT | Multilayer, glass-fibre-reinforced composite (PP-RCT / fibre / PP-RCT) |
| MF UV | SDR 7.4 | 20–25 | fusiolen PP-R | MF + polyethylene UV outer layer |
| MF OT | SDR 7.4 | 20–25 | fusiolen PP-R | MF + diffusion (oxygen) barrier |
| MF RP | SDR 9 (32 mm) / SDR 11 (40–450 mm) / SDR 17.6 (125–630 mm) | 32–630 | fusiolen PP-RCT | Multilayer fibre-reinforced, raised pressure resistance |
| MF RP UV | SDR 9 (32 mm) / SDR 11 (40–450 mm) / SDR 17.6 (160–630 mm) | 32–630 | fusiolen PP-RCT | MF RP + polyethylene UV outer layer |
| MF RP OT | SDR 9 (32 mm) / SDR 11 (40–250 mm) | 32–250 (product page: 20–250) | fusiolen PP-RCT | MF RP + diffusion (oxygen) barrier |
MF = multilayer glass-fibre-reinforced; RP = raised pressure resistance (PP-RCT); UV = polyethylene UV outer layer; OT = oxygen diffusion barrier.
aquatherm blue S
20–32 mmSingle-layer pipe; the catalogue notes it is particularly suitable for cold water installations (media up to 45 °C). SDR 11 S is also supplied in coils in 20/25/32 mm. Note: the product page also lists SDR 7.4 for S; only SDR 11 S appears in the catalogue price list.
Standards: DIN 8077/78, DIN EN ISO 15874, ASTM F 2389, CSA B 137.11, NSF 14
aquatherm blue MF
20–25 mmMultilayer extruded pipe with a glass fibre middle layer. Catalogue: linear expansion at least 75% lower than standard PP pipe; the thinner wall gives 20% more flow at the same pressure; the expansion coefficient is close to that of metal pipe.
Standards: SKZ HR 3.28, ASTM F 2389, CSA B 137.11, ISO 21003
aquatherm blue MF UV
20–25 mmMF pipe with a black polyethylene outer layer for outdoor installation exposed to sunlight.
Standards: SKZ HR 3.28, ASTM F 2389, CSA B 137.11, ISO 21003
aquatherm blue MF OT
20–25 mmMF pipe with an oxygen diffusion barrier to DIN 4726 for closed heating circuits with metal components.
Standards: DIN 8077/78, DIN EN ISO 15874, ASTM F 2389, CSA B 137.11, ISO 21003
aquatherm blue MF RP
32–630 mmfusiolen PP-RCT fibre-composite pipe with raised pressure resistance; SDR 9 at 32 mm, SDR 11 at 40–450 mm and SDR 17.6 at 125–630 mm. The main series for risers, mains and large-diameter cooling lines.
Standards: SKZ HR 3.28, ASTM F 2389, CSA B 137.11, ISO 21003
aquatherm blue MF RP UV
32–630 mmMF RP with a black UV-resistant outer layer for outdoor mains, 32–630 mm.
Standards: SKZ HR 3.28, ASTM F 2389, CSA B 137.11, ISO 21003
aquatherm blue MF RP OT
32–250 mmMF RP with an oxygen barrier (DIN 4726), 32–250 mm; peeled before welding. Push-fit fittings and 160–250 mm electrofusion sockets are not used on OT pipe.
Standards: DIN 8077/78, DIN EN ISO 15874, ASTM F 2389, CSA B 137.11, ISO 21003
Contact us for the variants held in Ankara stock and current lead times. Images and technical data: aquatherm GmbH (aquatherm.de, aquatherm blue technical catalogue 2026). Values are as published by the manufacturer; the current catalogue governs project calculations.
Why an oxygen barrier (OT) is needed
Where a heating system contains metal components such as pumps, valves and heat exchangers, oxygen diffusing through the pipe wall accelerates corrosion of those components. aquatherm blue OT pipe is built as PP-RCT layer / fibre layer / PP-RCT layer / oxygen barrier and meets the requirements of DIN 4726.
- OT pipe is peeled before welding with the peeling tool (art. no. 9800050479–9800050488); peeling depths are in the welding parameters table.
- OT socket fusion in 20–125 mm; for branches, the weld-in saddle OT can be applied later.
- Push-fit fittings and 160–250 mm electrofusion sockets are not used on OT pipe.
Joining methods
| Method | Diameter | Note |
|---|---|---|
| Socket fusion (hand tool) | 20–63 mm | General rules of DVS 2207-11 apply. |
| Socket fusion (welding machine) | 50–125 mm | — |
| Butt welding | 160–630 mm | With dedicated butt welding machines. |
| Electric welding jig | 63–125 mm | Assists socket fusion. |
| Electrofusion socket welding | 20–250 mm | For hard-to-reach locations; 160–250 mm sockets are not used on OT pipe. |
| Weld-in saddle OT | — | For adding branches to OT pipe later. |
| OT socket fusion | 20–125 mm | Peeling is mandatory. |
| Push-fit fittings | 90–450 mm | SDR 11 and SDR 17.6 MF RP pipe; not OT. |
aquatherm push-fit fittings
A mechanical connection developed exclusively for aquatherm blue piping systems, with no welding. Joints are made up to 40% faster than with electrofusion sockets and need far fewer tools. The joint takes full pressure immediately after assembly; there is no waiting or cooling time.
| Property | Value |
|---|---|
| Diameter range | 90–450 mm |
| Compatible pipe | aquatherm blue SDR 11 and SDR 17.6 (except oxygen-tight OT pipe) |
| Temperature range | Medium 0–95 °C (verified by the IMA Dresden test institute) |
| Material | Body fusiolen PP-RCT (product list: PP-RP / EPDM seal) |
| Standard | DIN EN ISO 15874 |
Components
- Socket body: Durable fusiolen PP-RCT
- Gripping teeth: High-strength plastic; provides pull-out resistance
- Profile ring: Keeps dirt out of the mechanism
- Spring-loaded independent segments: Guide the gripping elements and generate the radial force
- Thrust unit: Easily replaced if required
Installation benefits
- Shorter installation time (brochure example: 110 mm MF RP pipe, electrofusion socket about 30 min each, push-fit about 6 min each)
- Installation in any weather, including below 0 °C
- Use in confined spaces such as riser shafts, trenches or below ceilings
- No heavy or expensive tools; tool-free installation below 160 mm
- Residual medium in the pipe is no problem for retrofit work
- Immediately and permanently tight
Product programme: Push-fit adapter (SDR 11: 90–450 mm; SDR 17.6: 125–450 mm); Push-fit coupling (double push-fit socket) 90–450 mm; End cap, 90° elbow, 45° elbow and tee with push-fit adapters (SDR 11 and SDR 17.6; some parts from 315 mm are segment-welded pipe sections).
Tested at IMA Dresden together with aquatherm blue pipe to DIN EN ISO 15874 in 0 °C / 20 °C and 20 °C / 95 °C temperature cycling; no leakage or fracture. Reference: Varta AG, Germany.
Diameter, wall thickness and weight
Catalogue pipe tables; UV and OT variants have the same outside diameter and wall thickness, with a small difference in weight per metre.
| Outside dia. | Wall (mm) | Inside dia. (mm) | Water (l/m) | Weight (kg/m) | DN | Welding |
|---|---|---|---|---|---|---|
| 40 mm | 3.7 | 32.6 | 0.834 | 0.430 | DN 32 | Socket |
| 50 mm | 4.6 | 40.8 | 1.307 | 0.651 | DN 40 | Socket |
| 63 mm | 5.8 | 51.4 | 2.074 | 1.062 | DN 50 | Socket |
| 75 mm | 6.8 | 61.4 | 2.959 | 1.494 | DN 65 | Socket |
| 90 mm | 8.2 | 73.6 | 4.252 | 2.141 | DN 80 | Socket |
| 110 mm | 10.0 | 90.0 | 6.359 | 3.239 | — | Socket |
| 125 mm | 11.4 | 102.2 | 8.199 | 4.092 | DN 100 | Socket |
| 160 mm | 14.6 | 130.8 | 13.430 | 6.710 | DN 125 | Butt |
| 200 mm | 18.2 | 163.6 | 21.010 | 10.442 | DN 150 | Butt |
| 250 mm | 22.7 | 204.6 | 32.861 | 16.579 | DN 200 | Butt |
| 315 mm | 28.6 | 257.8 | 52.172 | 26.223 | DN 250 | Butt |
| 355 mm | 32.2 | 290.6 | 66.290 | 33.276 | DN 300 | Butt |
| 400 mm | 36.3 | 327.6 | 84.290 | 42.266 | DN 300 | Butt |
| 450 mm | 40.9 | 368.2 | 106.470 | 53.566 | DN 400 | Butt |
| Outside dia. | Wall (mm) | Inside dia. (mm) | Water (l/m) | Weight (kg/m) | DN | Welding |
|---|---|---|---|---|---|---|
| 125 mm | 7.1 | 110.8 | 9.637 | 2.666 | — | Socket |
| 160 mm | 9.1 | 141.8 | 15.792 | 4.390 | — | Butt |
| 200 mm | 11.4 | 177.2 | 24.661 | 6.927 | — | Butt |
| 250 mm | 14.2 | 221.6 | 38.568 | 10.636 | — | Butt |
| 315 mm | 17.9 | 279.2 | 61.223 | 16.606 | — | Butt |
| 355 mm | 20.1 | 314.8 | 77.832 | 21.589 | — | Butt |
| 400 mm | 22.7 | 354.6 | 98.756 | 27.468 | — | Butt |
| 450 mm | 25.5 | 399.0 | 125.036 | 34.716 | — | Butt |
| 500 mm | 28.4 | 443.2 | 154.272 | 42.955 | — | Butt |
| 630 mm | 35.7 | 558.6 | 245.070 | 68.044 | — | Butt |
| Series | Outside dia. | Wall (mm) | Inside dia. (mm) | Water (l/m) | Weight (kg/m) | DN | Welding |
|---|---|---|---|---|---|---|---|
| SDR 7.4 MF | 20 mm | 2.8 | 14.4 | 0.163 | 0.157 | DN 15 | Socket |
| SDR 7.4 MF | 25 mm | 3.5 | 18.0 | 0.254 | 0.244 | DN 20 | Socket |
| SDR 9 MF RP | 32 mm | 3.6 | 24.8 | 0.483 | 0.334 | DN 25 | Socket |
| SDR 11 S | 20 mm | 1.9 | 16.2 | 0.206 | 0.108 | DN 15 | Socket |
| SDR 11 S | 25 mm | 2.3 | 20.4 | 0.327 | 0.165 | DN 20 | Socket |
| SDR 11 S | 32 mm | 2.9 | 26.2 | 0.539 | 0.261 | DN 25 | Socket |
SDR 11 S 20/25/32 mm is also available in coils. SDR 11 MF RP OT 40–250 mm and SDR 17.6 MF RP UV 160–630 mm share the same dimensions; the full list is in the catalogue.
Images and technical data: aquatherm GmbH (aquatherm.de, aquatherm blue technical catalogue 2026). Values are as published by the manufacturer; the current catalogue governs project calculations.
Permissible working pressure (bar)
General pressure pipe applications, continuous operation; by temperature and design life. SDR is selected from this table; aquatherm does not publish PN classes.
| Temperature | Design life | SDR 17.6 MF RP | SDR 11 MF RP | SDR 11 S | SDR 9 MF RP |
|---|---|---|---|---|---|
| 10 °C | 10 years | 13.1 | 25.3 | 19.3 | 27.5 |
| 10 °C | 25 years | 12.9 | 24.7 | 18.7 | 27.1 |
| 10 °C | 50 years | 12.7 | 24.1 | 18.2 | 26.7 |
| 10 °C | 100 years | 12.6 | 23.5 | 17.8 | 26.3 |
| 15 °C | 10 years | 12.3 | 23.4 | 17.8 | 25.7 |
| 15 °C | 25 years | 12.1 | 22.8 | 17.2 | 25.2 |
| 15 °C | 50 years | 11.9 | 22.2 | 16.8 | 24.9 |
| 15 °C | 100 years | 11.7 | 21.6 | 16.3 | 24.5 |
| 20 °C | 10 years | 11.4 | 21.4 | 16.4 | 23.9 |
| 20 °C | 25 years | 11.2 | 21.0 | 15.9 | 23.5 |
| 20 °C | 50 years | 11.0 | 20.4 | 15.4 | 23.1 |
| 20 °C | 100 years | 10.9 | 19.9 | 15.0 | 22.8 |
| 30 °C | 10 years | 9.8 | 18.3 | 13.9 | 20.6 |
| 30 °C | 25 years | 9.6 | 17.8 | 13.4 | 20.2 |
| 30 °C | 50 years | 9.5 | 17.3 | 13.0 | 19.9 |
| 30 °C | 100 years | 9.4 | 16.8 | 12.7 | 19.7 |
| 40 °C | 10 years | 8.4 | 15.5 | 11.8 | 17.7 |
| 40 °C | 25 years | 8.3 | 15.0 | 11.3 | 17.3 |
| 40 °C | 50 years | 8.1 | 14.6 | 11.0 | 17.1 |
| 40 °C | 100 years | 8.0 | 14.1 | 10.7 | 16.8 |
| 50 °C | 10 years | 7.2 | 13.0 | 9.9 | 15.1 |
| 50 °C | 25 years | 7.0 | 12.6 | 9.5 | 14.7 |
| 50 °C | 50 years | 6.9 | 12.2 | 9.2 | 14.5 |
| 50 °C | 100 years | 6.8 | 11.9 | 9.0 | 14.3 |
| 60 °C | 10 years | 6.1 | 10.9 | 8.3 | 12.7 |
| 60 °C | 25 years | 5.9 | 10.6 | 8.0 | 12.4 |
| 60 °C | 50 years | 5.8 | 10.3 | 7.7 | 12.2 |
| 70 °C | 10 years | 5.1 | 8.5 | 7.0 | 10.7 |
| 70 °C | 25 years | 5.0 | 8.3 | 6.0 | 10.4 |
| 70 °C | 50 years | 4.9 | 8.1 | 5.1 | 10.2 |
| 75 °C | 10 years | 4.6 | 7.7 | 6.0 | 9.7 |
| 75 °C | 25 years | 4.5 | 7.6 | 4.8 | 9.5 |
| 75 °C | 50 years | 4.4 | 7.3 | 4.0 | 9.3 |
| 80 °C | 5 years | 4.3 | 7.2 | 5.7 | 9.0 |
| 80 °C | 10 years | 4.2 | 7.0 | 4.8 | 8.9 |
| 80 °C | 25 years | 4.1 | 6.8 | 3.9 | 8.6 |
| 90 °C | 5 years | 3.5 | 5.9 | 3.7 | 7.4 |
| 90 °C | 10 years | 3.4 | 5.8 | 3.2 | 7.3 |
A reduction factor of 0.75 (table values reduced by 25%) applies to fittings made from butt-welded pipe segments. For media such as water-glycol and for short-term peaks above 90 °C, see the catalogue notes.
Source: aquatherm GmbH, "Permissible working pressure for general applications" and the aquatherm blue technical catalogue.
Welding parameters
Socket fusion to DVS 2207-11. AQE column: heating time recommended by aquatherm for ambient temperatures below +5 °C.
| Diameter | Heating DVS (s) | Heating AQE (s) | Joining (s) | Cooling (min) | Welding depth (mm) | Peeling, socket (mm) | Peeling, e-socket (mm) | Insertion depth (mm) |
|---|---|---|---|---|---|---|---|---|
| 20 mm | 5 | 8 | 4 | 2 | 14.5 | 16 | 39 | 35.0 |
| 25 mm | 7 | 11 | 4 | 2 | 16.0 | 20 | 43 | 39.0 |
| 32 mm | 8 | 12 | 6 | 4 | 18.0 | 22 | 45 | 40.0 |
| 40 mm | 12 | 18 | 6 | 4 | 20.5 | 25 | 50 | 46.0 |
| 50 mm | 18 | 27 | 6 | 4 | 23.5 | 28 | 56 | 51.0 |
| 63 mm | 24 | 36 | 8 | 6 | 27.5 | 32 | 65 | 59.0 |
| 75 mm | 30 | 45 | 8 | 8 | 30.0 | 34 | 69 | 65.0 |
| 90 mm | 40 | 60 | 8 | 8 | 33.0 | 37 | 77 | 72.5 |
| 110 mm | 50 | 75 | 10 | 8 | 37.0 | 42 | 85 | 80.0 |
| 125 mm | 60 | 90 | 10 | 8 | 40.0 | 44 | 90 | 86.0 |
160–630 mm are joined by butt welding. Electrofusion insertion depth: 160 mm → 93 mm, 200 mm → 105 mm, 250 mm → 125 mm. The peeling columns apply to OT (oxygen-barrier) pipe.
| Diameter | SDR 11 | SDR 9 | SDR 17.6 |
|---|---|---|---|
| 160 mm | 1.0 | 1.0 | 1.0 |
| 200 mm | 1.0 | 1.5 | 1.0 |
| 250 mm | 1.5 | 1.5 | 1.0 |
| 315 mm | 2.0 | 2.0 | 1.0 |
| 355 mm | 2.0 | 2.5 | 1.5 |
| 400 mm | 2.0 | — | 1.5 |
| 450 mm | — | — | 1.5 |
| 500 mm | — | — | 2.0 |
| 560 mm | — | — | 2.0 |
| 630 mm | — | — | 2.0 |
Support spacing, cm
Rows: ΔT = operating temperature − installation temperature (K). In vertical lines the spacing may be increased by about 20%.
| ΔT (K) | 32 | 40 | 50 | 63 | 75 | 90 | 110 | 125 | 160 | 200 | 250 | 315 | 355 | 400 | 450 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 150 | 170 | 195 | 220 | 235 | 250 | 275 | 280 | 285 | 290 | 300 | 310 | 315 | 325 | 325 |
| 20 | 110 | 125 | 145 | 165 | 175 | 185 | 200 | 205 | 210 | 220 | 225 | 230 | 235 | 250 | 265 |
| 30 | 110 | 125 | 145 | 165 | 175 | 185 | 190 | 195 | 200 | 210 | 215 | 220 | 225 | 240 | 255 |
| 40 | 100 | 115 | 135 | 155 | 165 | 175 | 180 | 185 | 190 | 200 | 210 | 210 | 215 | 230 | 245 |
| 50 | 100 | 115 | 135 | 155 | 160 | 170 | 170 | 175 | 180 | 190 | 200 | 205 | 205 | 220 | 235 |
| 60 | 95 | 110 | 125 | 145 | 150 | 160 | 160 | 165 | 170 | 180 | 185 | 190 | 195 | 205 | 220 |
| 70 | 85 | 100 | 120 | 135 | 140 | 145 | 150 | 155 | 160 | 170 | 175 | 185 | 190 | 195 | 210 |
| ΔT (K) | 125 | 160 | 200 | 250 | 315 | 355 | 400 | 450 | 500 | 630 |
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 255 | 260 | 265 | 275 | 280 | 285 | 295 | 305 | 315 | 330 |
| 20 | 185 | 190 | 200 | 205 | 210 | 215 | 230 | 240 | 255 | 280 |
| 30 | 175 | 180 | 190 | 195 | 200 | 205 | 220 | 230 | 245 | 275 |
| 40 | 170 | 175 | 180 | 190 | 190 | 195 | 210 | 225 | 235 | 265 |
| 50 | 160 | 165 | 175 | 180 | 185 | 190 | 200 | 215 | 230 | 255 |
| 60 | 150 | 155 | 165 | 170 | 175 | 180 | 185 | 200 | 215 | 240 |
| 70 | 140 | 145 | 155 | 160 | 170 | 175 | 180 | 190 | 205 | 230 |
Column headings are outside diameters (mm). The small-diameter ranges for SDR 7.4 MF, SDR 9 MF RP and SDR 11 S are in the installation principles PDF. Source: aquatherm GmbH, installation principles 07/2026.
Thermal expansion
ΔL = α × L × ΔT; α = 0.035 mm/(m·K) for fibre-composite pipe, 0.15 mm/(m·K) for PP-R pipe without fibre. Example: 0.035 mm/(m·K) × 25 m × 40 K = 35 mm.
Straight fibre-composite runs need expansion compensation above 40 m; pipe without fibre every 10 m.
Pressure test
- Preliminary test: 3 × 5 min at 18 bar (aquatherm blue SDR 17.6: 10 bar); the line is depressurised between cycles.
- Main test: 15 min at 10 bar; drop at most 0.5 bar.
- Final test: 60 min at 10 bar; drop at most 0.5 bar.
The test report is signed by client and contractor; the 10-year warranty depends on this documented test.
Fixed and sliding points, storage
Clamps are selected for the outside diameter of the plastic pipe; aquatherm clamps suit both fixed and sliding points. Fixed point: 0 spacer rings; sliding point: 1 spacer ring (MF and S pipe). Swinging hangers are not used as fixed points.
Pipe may be stored outdoors at any temperature on a flat, firm surface. It is sensitive to impact below 0 °C. Outdoors in undamaged original packaging for at most 6 months.
Where is it used?
Chilled water and cooling systems
Closed-circuit chilled water and cooling loops, from server rooms to food, beverage and pharmaceutical cooling. Corrosion-resistant, diffusion-tight polypropylene is suited to carrying coolant in closed systems; for buried runs the pre-insulated version (aquatherm energy) carries it over long distances with little temperature loss.
References: Art Depot Boijmans Van Beuningen (Netherlands), AFAS Clubhuis (Netherlands), Arina Beach Resort (Greece)
Heating installations
Heating water distribution from the heat generator connection (heat pump, buffer tank, boiler) through plant-room and manifold installation, risers and horizontal distribution to radiator and underfloor heating supply. Connection to existing metal networks in refurbishment and external or buried lines are also covered.
References: Orsolina28 (Italy), Hotel Poststadl (Germany), Arina Beach Resort (Greece)
HVAC connections
In air-conditioning systems steel pipe corrodes from the outside because of condensation between pipe and insulation; in heating systems internal corrosion raises pressure loss and pump energy. aquatherm blue is corrosion-resistant polypropylene, so there are no deposits, pitting or leaks.
References: Research vessels Snow Dragon 1 and 2 (China), hybrid superyacht Artefact (Germany)
Data centre liquid cooling
Rack power densities in AI servers and GPU clusters are rising from 65 kW to more than 150 kW; such loads make liquid cooling mandatory. aquatherm blue is used in closed chilled water loops, heat exchanger cooling, containment and free cooling systems and direct-to-chip (DLC) connections.
References: Novva hyperscale data centre (USA); Microsoft and Credit Suisse data centres (product page reference)
Chilled water and cooling systems
Industrial cooling — free cooling and cooling towers above 20 °C; compression chillers from −40 °C to +10 °C with water-glycol, water-alcohol and brine; comfort cooling at 6–20 °C.
Heating installations
Selection criteria: temperature range, pressure, hydraulically controllable pressure losses, permanently tight joints; OT pipe may be needed where pumps, valves or heat exchangers are present.
HVAC connections
Thermal conductivity 0.15 W/mK: less heat, cold and anti-condensation insulation than metal pipe; sound-insulating; low weight.
Data centre liquid cooling
Smooth bore (friction coefficient 0.007) for low pressure loss and pump energy; secondary fluid networks with dielectric fluids; transition systems from copper or PEX for phased expansion and retrofit.
Other areas: Refrigeration, Marine applications, Swimming pool technology, Sports surface heating and cooling, Industrial underfloor heating, Plant engineering and industrial buildings (water and chemical lines, agriculture).
Certificates and standards
- DIN 8077/78, DIN EN ISO 15874 (S and OT pipe)
- SKZ HR 3.28, ASTM F 2389, CSA B 137.11, ISO 21003 (MF and MF RP pipe)
- NSF 14 (SDR 11 S)
- DIN 4726 (OT oxygen tightness)
- ISO 9001 (since 1996)
- ISO 14001
- ISO 50001
Planning standards: DIN 1988, DVS 2207/2208, ISO 10508.
EPD: to ISO 14025 and EN 15804, cradle to gate; product groups aquatherm green/blue S/MF, S/MF (OT), S/MF (UV), S/MF (ENERGY).
External monitoring by SKZ (Germany), NSF (USA), IIP (Italy), CSTB (France), TGM (Austria) and the Hygieneinstitut des Ruhrgebiets. The country-by-country certificate list is on aquatherm.de; certificates are valid only under the legislation of the country concerned. No Turkish-specific certificate (TSE etc.) was found in the source.
Warranty and system
Catalogue: a 10-year manufacturer's warranty on all pipes and fittings instead of the 2 years required by German law; the warranty takes effect with a pressure test carried out and documented to the aquatherm specification.
System components: straight lengths and coils, a fittings programme shared with aquatherm green, flange adapters, PP-to-metal transitions, weld-in saddle branches, manifolds, valves, welding equipment and clamps.
Market launch: 2002 (catalogue history); the diameter range was extended to 630 mm in 2010.
Related products and services
Green pipe
Drinking water lines; pressure-temperature table and all technical data.
Go to page Kaskyapı workshopHeating and cooling manifolds
Fan coil and plant-room manifolds from blue pipe, delivered pressure tested.
Go to page FittingsFittings and valves (Turkish)
Elbows, tees, flange adapters, metal transitions, ball valves.
Go to pageaquatherm blue — frequently asked questions
Which cooling applications is aquatherm blue used for?
Closed-circuit chilled water systems in building services and industry: from chilled water and cooling lines to liquid cooling in data centres.
Which heating applications is it suitable for?
Closed heating circuits, from single- and two-pipe heating systems to industrial heating loops.
Which variants are available?
S, MF, MF UV, MF OT, MF RP, MF RP UV and MF RP OT; 20–630 mm, SDR 7.4 / 9 / 11 / 17.6.
Which standards apply to planning and installation?
DIN 1988, DVS 2207/2208 and ISO 10508; details are in the installation documentation.
Why does oxygen tightness matter?
If the system contains metal components such as pumps, valves or heat exchangers, oxygen entering through the pipe wall accelerates corrosion; in that case OT pipe should be selected.
Can it be combined with components of other materials?
Yes, provided it is verified that the operating parameters defined for PP do not harm the other components and vice versa. The fact that aquatherm pipe resists a medium does not mean the metal components in the system do; metal parts may need corrosion protection.
Can blue pipe be used for drinking water?
For drinking water, use the drinking-water-approved aquatherm green. aquatherm blue is intended for closed-circuit heating and cooling and technical pipe networks.
Catalogue, tables and documents
aquatherm GmbH publications in their original English, downloadable as PDF. Turkish translations prepared by Kaskyapı are secondary; the manufacturer's original is the binding document.
- aquatherm blue technical catalogue (2026)PDF · 16.7 MB
- Permissible working pressure – general applicationsPDF · 0.0 MB
- Push-fit fitting brochure (2026)PDF · 1.3 MB
- Installation principles (07/2026)PDF · 0.8 MB
- Table of loss coefficients (zeta values)PDF · 0.2 MB
Images and technical data: aquatherm GmbH (aquatherm.de, aquatherm blue technical catalogue 2026). Values are as published by the manufacturer; the current catalogue governs project calculations. Documents are the original files published by the manufacturer.
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