VALDuotherm PP-R SDR6 pipe is used for indoor cold and hot water supply installations, as follows:
– Class 1 – hot water 60\u00b0C – PN 10 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 8 bar; design temperature related to service life: 70\u00b0C\/49 years + 80\u00b0C\/1 year + 95\u00b0C\/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\u00b0C is 10 bar).<\/p>\n
The linear expansion coefficient of single-layer PP-R pipes is \u03b1 = 0.15 mm\/m\u00b7K, which is why, 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 system are positioned near branches, valves, or wall penetrations, and the sliding ones are installed along the route at well-defined distances. This ensures system alignment, support, and controlled axial movement. When installing PP-R pipes in screed or in the wall, they are installed in protective sleeves with a flexible structure, good insulation, 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: the pipes 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 \u00d7 the pipe\u2019s outside diameter. Threaded joints are not permitted in screed or in the wall. The pressure test is carried out before the pipe\/system is permanently buried. <\/p>\n
The technical manual covers methods for assessing expansion and ways to compensate for it, including clamp positioning.<\/p>\n","protected":false},"excerpt":{"rendered":"
For indoor cold and hot water supply installations, as follows: – Class 1 (hot water 60\u00b0C) – design temperature related to service life: 60\u00b0C\/49 years + 80\u00b0C\/1 year + 95\u00b0C\/100 hours. – Class 2 (hot water 70\u00b0C) – design temperature related to service life: 70\u00b0C\/49 years + 80\u00b0C\/1 year + 95\u00b0C\/100 hours. <\/p>\n","protected":false},"featured_media":97196,"template":"","meta":{"inline_featured_image":false,"wds_primary_product_brand":0,"wds_primary_product_cat":0},"product_brand":[],"product_cat":[8059],"product_tag":[],"class_list":{"0":"post-129326","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-gray-ppr-pressure-pipes","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"yoast_head":"\n