VALDuotherm PP-R\/PP-R+GF\/PP-R SDR 7.4 pipe is used for indoor cold water, hot water and heating installations, as follows:
– Class 1 – hot water 60\u00b0C \u2013 PN8 bar; design temperature related to service life: 60\u00b0C\/49 years + 80\u00b0C\/1 year + 95\u00b0C\/100 hours;
– Class 2 (hot water 70\u00b0C) – PN 6 bar; design temperature related to service life: 70\u00b0C\/49 years + 80\u00b0C\/1 year + 95\u00b0C\/100 hours;
– Class 5 (heating installations including high-temperature radiators) – PN 6 bar, design temperature related to service life: 20\u00b0C\/14 years + 60\u00b0C\/25 years + 80\u00b0C\/10 years + 90\u00b0C\/1 year +100\u00b0C\/100 hours;
– cold water PN 16 bar at c=1.5 and PN 20 bar at c=1.25 (Informative – In accordance with SR EN ISO 21003-1 – the design pressure for sanitary cold water installations for a period of 50 years at a temperature of 20\u00b0C is 10 bar).<\/p>\n
Reference standard: SR EN ISO 21003-2 – Multilayer piping systems for hot and cold water installations inside buildings, Part 2: Pipes<\/p>\n
The linear expansion coefficient of PP-R\/PP-R+GF\/PP-R pipes is \u03b1 = 0.045 mm\/m K, which is why before wall mounting (surface mounting) of PP-R\/PP-R+GF\/PP-R pipes, the effect of pipe expansion or contraction must be evaluated. 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 periods. As a rule, installation expansion is compensated between 2 fixed points by changing direction, expansion loop or where not possible, compensators must be fixed between the pipe and structure. Installation fixing clamps (also called fixed points) are positioned near branches, valves or wall penetrations, while sliding ones are mounted along the installation route at well-defined distances. This ensures installation alignment, support and controlled axial displacement. When installing fiber PP-R pipes in screed or wall, they are mounted in protective pipes with flexible structure, good insulators and capable of absorbing pipe expansion. In case of excessive expansion difficult to compensate through the insulating protective pipe, an expansion compensator must be calculated and installed. Attention, pipes must be installed at an acceptable depth under the screed or inside the wall to avoid cracks; in addition, excessive internal stresses from joints must be avoided. Installation depth must be greater than or equal to 1.5 \u00d7 pipe outer diameter. Threaded joints are not accepted in screed or wall. Pressure test is performed before final burial of the pipe\/installation.
The technical manual covers methods for evaluating expansion and ways to compensate for it, including clamp positioning. <\/p>\n","protected":false},"excerpt":{"rendered":"
For cold and hot water sanitary installations, and heating installations, as follows: – Class 1 (hot water 60C) – design temperature related to service life: 60C\/49 years + 80C\/1 year + 95C\/100 hours. – Class 2 (hot water 70C) – design temperature related to service life: 70C\/49 years + 80C\/1 year + 95C\/100 hours. – Class 5 (radiator heating) – design temperature related to service life: 80C\/10 years + 60C\/25 years + 20C\/14 years + 90C\/1 year +100C\/100 hours. <\/p>\n","protected":false},"featured_media":97430,"template":"","meta":{"inline_featured_image":false,"wds_primary_product_brand":0,"wds_primary_product_cat":0},"product_brand":[],"product_cat":[8070],"product_tag":[],"class_list":{"0":"post-129341","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-white-ppr-pressure-pipes","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"yoast_head":"\n