

MECHANICAL. PP-RCT plastic pipe system for HVAC & industry
Suitable for: HVAC
Cooling water
Process water
Condensers
Heating & cooling connection
Compressed air
Geothermal energy/district heating
Simple installation – decades of use without loss of performance or leaks
- Ø 20-500 mm
- SDR 7.4, SDR 11.0 & SDR 17.6
- Enormous longevity
- High operational reliability
- 75 % less linear expansion
- Fewer fixing points
- Higher flow rate
- Up to 80 % lighter than steel
- Easy, safe installation
No rust. No deposits. Plastic pipes for industrial & plant engineering
MECHANICAL PP-RCT pipe systems for industrial applications, commercial applications and air conditioning are characterized by their high stability, safety, durability and cost-effectiveness. MECHANICAL PP-RCT is a pipe system with unique properties: Ideal for use in industrial plant construction. In addition to their long service life, our products are easy to install and economical. Plastic pipes (PP-RCT pipes and fittings) from MECHANICAL withstand aggressive chemicals and are ideal for transporting demanding media (e.g. acids).
The high corrosion resistance of our plastic pipes also makes them suitable for use in cooling water systems. MECHANICAL PP-RCT pipe systems have proven themselves in media supply and meet the individual requirements of a wide range of plant construction projects.
The POLYMELT MECHANICAL product line
MECHANICAL PP-RCT pipe SDR 7.4

Suitable for
HVAC
Cooling water
Process water
Condensers
Heating & cooling connection
Compressed air
Geothermal energy/district heating
PP-RCT, multilayer pipe, fiber-reinforced, color: grey, standards: DIN 8077/78, EN ISO 15874, ASTM 2389, NSF14, certificate: ICC-ES PMG 1458, available sizes: 20-25 mm, pipe length: 20-25 mm; in 5.8 m lengths, special lengths on request
Art. No. | Outer-Ø (mm) | Wall thickness (mm) | Inner-Ø (mm) |
680322 | 20 | 2,8 | 14,4 |
680323 | 25 | 3,5 | 18,0 |
MECHANICAL PP-RCT pipe SDR 11

Suitable for
HVAC
Cooling water
Process water
Condensers
Heating & cooling connection
Compressed air
Geothermal energy/district heating
PP-RCT, multilayer pipe, fiber-reinforced, color: grey, standards: DIN 8077/78, EN ISO 15874, ASTM 2389, NSF14, certificate: ICC-ES PMG 1458, available sizes: 20-25 mm, pipe length: 32-450 mm; in 5.8 m lengths, special lengths on request
Art. No. | Outer-Ø (mm) | Wall thickness (mm) | Inner-Ø (mm) |
680324 | 32 | 2,9 | 26,2 |
680325 | 40 | 3,7 | 32,6 |
680326 | 50 | 4,6 | 40,8 |
680327 | 63 | 5,8 | 51,4 |
680328 | 75 | 6,8 | 61,4 |
680329 | 90 | 8,2 | 73,6 |
680330 | 110 | 10,0 | 90,0 |
680331 | 125 | 11,4 | 102,2 |
680333 | 160 | 14,6 | 130,8 |
680334 | 200 | 18,2 | 163,6 |
680335 | 250 | 22,7 | 204,6 |
680346 | 315 | 28,6 | 257,8 |
680347 | 355 | 32,2 | 290,6 |
680348 | 400 | 36,3 | 327,4 |
680349 | 450 | 40,9 | 368,2 |
MECHANICAL PP-RCT pipe SDR 17.6

Suitable for
HVAC
Cooling water
Process water
Condensers
Heating & cooling connection
Compressed air
Geothermal energy/district heating
PP-RCT, multilayer pipe, fiber-reinforced, color: grey, standards: DIN 8077/78, EN ISO 15874, ASTM 2389, NSF14, certificate: ICC-ES PMG 1458, available sizes: 20-25 mm, pipe length: 125-500 mm; in 5.8 m lengths, special lengths on request
Art. No. | Outer-Ø (mm) | Wall thickness (mm) | Inner-Ø (mm) |
680351 | 125 | 7,1 | 110,8 |
680353 | 160 | 9,1 | 141,8 |
680354 | 200 | 11,4 | 177,2 |
680355 | 250 | 14,2 | 221,6 |
680366 | 315 | 17,9 | 279,2 |
680367 | 355 | 20,1 | 314,8 |
680368 | 400 | 22,7 | 354,6 |
680369 | 450 | 25,5 | 399,0 |
680370 | 500 | 28,4 | 443,2 |
Operating pressure values. Long-term behavior with a safety factor of 1.25.
Temperature | Operating time | Max. operating pressure SDR 11 (bar) | Max. operating pressure SDR 11 (psi) | Max. operating pressure SDR 17,6 (bar) | Max. operating pressure SDR 17,6 (psi) |
up to 10° C | 1 | 22,8 | 331 | 13,7 | 199 |
up to 10° C | 5 | 22,1 | 321 | 13,3 | 193 |
up to 10° C | 10 | 21,9 | 318 | 13,1 | 190 |
up to 10° C | 25 | 21,5 | 312 | 12,9 | 187 |
up to 10° C | 50 | 21,2 | 307 | 12,7 | 184 |
15° C | 1 | 22,1 | 321 | 13,2 | 191 |
15° C | 5 | 21,4 | 310 | 12,5 | 181 |
15° C | 10 | 21,0 | 305 | 12,0 | 174 |
15° C | 25 | 20,2 | 293 | 11,9 | 173 |
15° C | 50 | 19,5 | 283 | 11,5 | 167 |
20° C | 1 | 19,9 | 289 | 11,9 | 173 |
20° C | 5 | 19,3 | 280 | 11,6 | 168 |
20° C | 10 | 19,0 | 276 | 11,4 | 165 |
20° C | 25 | 18,6 | 270 | 11,2 | 162 |
20° C | 50 | 18,4 | 267 | 11,0 | 160 |
30° C | 1 | 17,2 | 249 | 10,3 | 149 |
30° C | 5 | 16,6 | 241 | 10,0 | 145 |
30° C | 10 | 16,4 | 238 | 9,8 | 142 |
30° C | 25 | 16,1 | 234 | 9,6 | 139 |
30° C | 50 | 15,8 | 229 | 9,5 | 138 |
40° C | 1 | 14,8 | 215 | 8,9 | 129 |
40° C | 5 | 14,3 | 207 | 8,6 | 125 |
40° C | 10 | 14,1 | 205 | 8,4 | 122 |
40° C | 25 | 13,8 | 200 | 8,3 | 120 |
40° C | 50 | 13,6 | 197 | 8,1 | 117 |
50° C | 1 | 12,6 | 183 | 7,6 | 110 |
50° C | 5 | 12,2 | 177 | 7,3 | 106 |
50° C | 10 | 12,0 | 174 | 7,2 | 104 |
50° C | 25 | 11,7 | 170 | 7,0 | 102 |
50° C | 50 | 11,5 | 167 | 6,9 | 100 |
60° C | 1 | 10,7 | 155 | 6,4 | 93 |
60° C | 5 | 10,3 | 149 | 6,2 | 90 |
60° C | 10 | 10,1 | 146 | 6,1 | 88 |
60° C | 25 | 9,9 | 144 | 5,9 | 86 |
60° C | 50 | 9,7 | 141 | 5,8 | 84 |
70° C | 1 | 9,0 | 131 | 5,4 | 78 |
70° C | 5 | 8,6 | 125 | 5,2 | 75 |
70° C | 10 | 8,5 | 123 | 5,1 | 74 |
70° C | 25 | 8,3 | 120 | 5,0 | 73 |
70° C | 50 | 8,1 | 117 | 4,9 | 71 |
75° C | 1 | 8,3 | 120 | 5,2 | 75 |
75° C | 5 | 8,0 | 116 | 4,8 | 70 |
75° C | 10 | 7,7 | 112 | 4,5 | 65 |
75° C | 25 | 7,3 | 106 | 4,0 | 58 |
75° C | 50 | 6,8 | 99 | 3,8 | 55 |
80° C | 1 | 7,5 | 109 | 4,5 | 65 |
80° C | 5 | 7,2 | 104 | 4,3 | 62 |
80° C | 10 | 7,0 | 102 | 4,2 | 61 |
80° C | 25 | 6,9 | 100 | 4,1 | 59 |
90° C | 1 | 5,6 | 81 | 3,4 | 49 |
90° C | 5 | 5,3 | 77 | 3,2 | 46 |
90° C | 10 | 5,2 | 75 | 3,1 | 45 |


MECHANICAL. PP-RCT plastic pipe system for HVAC & industry
Suitable for: HVAC
Cooling water
Process water
Condensers
Heating & cooling connection
Compressed air
Geothermal energy/district heating
Simple installation – decades of use without loss of performance or leaks
- Ø 20-500 mm
- SDR 7.4, SDR 11.0 & SDR 17.6
- Enormous longevity
- High operational reliability
- 75 % less linear expansion
- Fewer fixing points
- Higher flow rate
- Up to 80 % lighter than steel
- Easy, safe installation

Would you like to find out more about our pipe systems for drinking water & sanitary installations or pipes for HVAC & industry?
MECHANICAL PP-RCT pipe systems. Outstanding performance over many years.
MECHANICAL PP-RCT piping systems have a number of outstanding properties that make them a first-class choice. The special composition of our pipes ensures superior stability to withstand even the most demanding conditions.
Our piping systems are outstanding in workmanship, performance and ease of maintenance, setting standards that make your systems reliable and efficient in the long term.
- Low maintenance costs: The robust construction and chemical resistance minimize deposits, resulting in low maintenance costs and long-term stability.
- Consistent performance: MECHANICAL PP-RCT pipes maintain their efficiency over time, resulting in stable operating conditions and minimal downtime.
- No increase in pumping energy: Thanks to the smooth inner surface and low friction losses, our pipes provide efficient flow, resulting in lower operating costs and energy-efficient system operation.
- No deposits: Resistance to scaling makes MECHANICAL PP-RCT pipes the optimal choice for long-term, cost-effective piping systems.

MECHANICAL PP-RCT pipe systems. The durable, robust choice.
The durability of MECHANICAL PP-RCT piping systems is based on various features of the developed raw material. The improved structure improves heat resistance and stability. At the same time, PP-RCT pipes have a high chemical resistance and the linear expansion is much smaller than with conventional PP-R pipes. In addition, the smooth inner surfaces protect against deposits and rust or corrosion are not an issue.
- Long service life: The durable design of MECHANICAL PP-RCT pipes means that they will function reliably for decades. An investment that pays off in the long term.
- Resistance to environmental influences: Whether heat or cold – the temperature resistance of our pipes ensures consistent performance in all environmental scenarios.
- Minimized downtime: The consistent performance of MECHANICAL PP-RCT pipes helps to minimize unexpected downtime, which increases operational efficiency.
- Robust structure: The special composition of our pipes ensures superior structural stability to withstand the most demanding conditions, enabling consistent and stable performance.

Would you like to find out more about our pipe systems for drinking water & sanitary installations or pipes for HVAC & industry?