For indoor cold and hot water supply installations, as follows: – Class 1 (hot water 60°C) – design temperature related to service life: 60°C/49 years + 80°C/1 year + 95°C/100 hours. – Class 2 (hot water 70°C) – design temperature related to service life: 70°C/49 years + 80°C/1 year + 95°C/100 hours. INSTALLATION For PP-R pipes that are not installed embedded in a protective sleeve (where expansions occur within the sleeve) and for large-diameter pipes, measures to compensate for expansion must be taken already at the design stage. PPR pipes have the expansion coefficient: – PP-R (alpha) = 0.15 mm/m K, – PP-R/FIBRa (alpha) = 0.088 mm/m K – PP-R/Al (alpha) = 0.03 mm/m K. For surface-mounted installation, the system must be fixed to prevent uncontrolled pipe movement. Linear expansion is compensated between two fixed points. The system fixed points are positioned near branches, valves, or wall penetrations. Fixed points are placed so that expansion forces Length variation of the pipe depending on pipe length and temperature variation is calculated using the following formula: (delta)L = (alpha) x (delta)T x L (delta)L = L-Lo (delta)T = T – To where: (delta)L = total pipe length variation [mm] (delta)T = total temperature variation (alpha) = linear expansion coefficient, [mm/m K] T = operating temperature To = installation temperature L = pipe length at temperature T, [m] Lo = pipe length at temperature To, [m] Sliding points must be well fixed to ensure installation alignment, support, and axial movement, preventing vibrations and noise transmission. Calculation of the length of the L-type expansion compensator Where Lb = expansion arm length, [mm] d = pipe outside diameter, [mm] (delta)L = total pipe length variation [mm] C = dimensionless material constant (C = 30 for PP-R) FP: fixed point. SP: sliding point Calculation of the U expansion compensator The U compensator is an assembly of 2 L-type compensators, whose length is calculated with the formula above and the minimum width as follows: Lc = 2 x (delta)L + ms, Lc minimum width of the compensator. ms – safety width = 150 mm
VALDuotherm GRAY PP-R PIPE D. 20×3.4 mm SDR6 L4 m
VALDuotherm PP-R SDR6 pipe is used for indoor cold and hot water supply installations, as follows:
- Class 1 - hot water 60°C - PN 10 bar; design temperature related to service life: 60°C/49 years + 80°C/1 year + 95°C/100 hours;
- Class 2 (hot water 70°C) - PN 8 bar; design temperature related to service life: 70°C/49 years + 80°C/1 year + 95°C/100 hours;
- cold water PN 20 bar at c = 1.5 and PN 25 bar at c = 1.25 (Informative - In accordance with ISO 15874-1 - the design pressure for sanitary cold water installations for a period of 50 years at a temperature of 20°C is 10 bar).
The linear expansion coefficient of single-layer PP-R pipes is α = 0.15 mm/m K, therefore before wall mounting (surface mounting) PP-R pipes, the effect of pipe expansion or contraction must be assessed. Correct installation of clamps or other types of supports and correct positioning of expansion compensators prevents uncontrolled pipe movement due to temperature variations during installation and operation. As a rule, system expansion is compensated between 2 fixed points by changing direction, an expansion loop, or where this is not possible, compensators must be fixed between the pipe and the structure. The fixing clamps (also called fixed points) of the installation are positioned near branches, valves, or wall penetrations, and the sliding ones are installed along the route at well-defined distances. This ensures alignment of the installation, support, and controlled axial movement. When installing PP-R pipes in screed or wall, they are installed in flexible-structure protective sleeves, good insulators and capable of absorbing pipe expansion. In the case of excessive expansion that is difficult to compensate through the protective insulating sleeve, an expansion compensator must be calculated and installed. Attention: pipelines must be installed at an acceptable depth under the screed or inside the wall to avoid cracks; in addition, excessive internal stresses at joints must be avoided. The installation depth must be greater than or equal to 1.5 × the pipe outside diameter. Threaded joints are not permitted in screed or wall. The pressure test is performed before the pipe/installation is permanently embedded.
The technical manual covers methods for assessing expansion and ways to compensate for it, including clamp positioning.
- Class 1 - hot water 60°C - PN 10 bar; design temperature related to service life: 60°C/49 years + 80°C/1 year + 95°C/100 hours;
- Class 2 (hot water 70°C) - PN 8 bar; design temperature related to service life: 70°C/49 years + 80°C/1 year + 95°C/100 hours;
- cold water PN 20 bar at c = 1.5 and PN 25 bar at c = 1.25 (Informative - In accordance with ISO 15874-1 - the design pressure for sanitary cold water installations for a period of 50 years at a temperature of 20°C is 10 bar).
The linear expansion coefficient of single-layer PP-R pipes is α = 0.15 mm/m K, therefore before wall mounting (surface mounting) PP-R pipes, the effect of pipe expansion or contraction must be assessed. Correct installation of clamps or other types of supports and correct positioning of expansion compensators prevents uncontrolled pipe movement due to temperature variations during installation and operation. As a rule, system expansion is compensated between 2 fixed points by changing direction, an expansion loop, or where this is not possible, compensators must be fixed between the pipe and the structure. The fixing clamps (also called fixed points) of the installation are positioned near branches, valves, or wall penetrations, and the sliding ones are installed along the route at well-defined distances. This ensures alignment of the installation, support, and controlled axial movement. When installing PP-R pipes in screed or wall, they are installed in flexible-structure protective sleeves, good insulators and capable of absorbing pipe expansion. In the case of excessive expansion that is difficult to compensate through the protective insulating sleeve, an expansion compensator must be calculated and installed. Attention: pipelines must be installed at an acceptable depth under the screed or inside the wall to avoid cracks; in addition, excessive internal stresses at joints must be avoided. The installation depth must be greater than or equal to 1.5 × the pipe outside diameter. Threaded joints are not permitted in screed or wall. The pressure test is performed before the pipe/installation is permanently embedded.
The technical manual covers methods for assessing expansion and ways to compensate for it, including clamp positioning.
| Ambalare | PLASTIC BAG |
|---|---|
| Subclasa | GRAY PPR PRESSURE PIPES |
| Culoare | GRI |
| UM colete | BAG |
| Tara origine preferentiala | EU |
| Cod CPV | CPV 44115200-1 |
| Lungime | 4 m |
| SDR | 6 |
| Diametru | 20 |
| Cantitate colet | 20 |
| Diametru(mm) | |
| Durata estimata de viata | 50 Years |
| Perioada garantie | 60 Months |
| Cod vamal | 39172210 |
