PIR Premier and PUR classic sandwich panels
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Energy Safe Technologies PIR PREMIER AND PUR CLASSIC SANDWICH PANELS Technical Catalog

CHAPTER 1: GENERAL INFORMATION 1.1 HISTORY Sandwich panels are extensively used in the construction of prefabricated buildings, cold storages, deep freeze rooms, manufacturing facilities and offices, as well as for other purposes. During the COVID-19 pandemic, infection hospitals and pavilions are erected using this technology. With their high thermal insulation performance, sandwich panels reduce the costs of heating and conditioning. The energy savings, along with the fast speed of installation, is an important factor in their growing popularity. In 2005, the European Committee for...

of gases is tens and hundreds times lower than that of solid materials. PU foams are: • Energy-saving – their thermal conductivity is as low as 0.020 W/m·K and reaches 0.018 W/m·K if advanced blowing agents are used. • Eco-friendly – PU foams are everywhere from the soles of your shoes to the wheels of your car or to the insulation of fuel tanks in spacecraft. In Russia, they are approved for use in residential construction, since the order of Ministry of Health no. 07/6 561 on 26 December 1986. • Healthy – they are used in the food industry for cold storage. • Vapor- and waterproof. •...

1.4 WHAT IS THE DIFFERENCE BETWEEN PUR AND PIR PANELS? Polyisocyanurate (PIR) foam is a type of rigid polyurethane foam. It has improved fire resistance and differs from pure polyurethane foams only in the ratio in which the primary components, polyol and isocyanate, are mixed. This ratio is approximately 100:150 for PIR and about 100:110 for simple polyurethane. There is, therefore, more isocyanate in PIR panels than in PUR panels. Mechanical properties of the foam may also depend on the activators used. Sandwich panels with PUR Classic insulation are mainly applied in cold and deep freeze...

This means that a lower density translates into more effective insulation, but such foams are rather fragile. The figures below show the empirical relationship between thermal conductivity and density of PU foams. Figure 4. Relationship between thermal conductivity and average cell size in PU foams Figure 5. Relationship between thermal conductivity and density in PU foams These data suggest that a PU foam with the density of 40 kg/m³ is the best option for thermal insulation. As we will soon show, the rigidity of panels with this core density is also sufficient. Below are the results of...

Bending stress at failure, kPa Bending deflection at failure, mm Water absorption after 24 h, % Bond to faces at uniform separation, kPa Thermal conductivity, W/m·K Dimensional stability at +75 °С after 24 h, % Table 3. Results of tests of a fragment of PIR panel (component А is Voraterm CN815, no primer) Parameter Applicable standard Density, kg/m³ Apparent core density, kg/m³ Compression stress at 10% deformation, kPa Bond to faces at uniform separation, kPa 1.5 WHY IS PIR PREMIER BETTER THAN OTHER PIR SYSTEMS? While most Russian manufacturers of PU sandwich panels prefer ready-made...

As of May 2019, PH Insulation had made more than 5 million square meters of sandwich panels with PIR Premier and over 5 thousand tons of polyol systems. Currently PH Insulation manufactures panels and doors with PU insulation for more than two thousand companies annually in 15 countries around the world. WHAT IS THE SECRET OF PIR PREMIER PANELS? PIR Premier blend is manufactured with attention to all the special features of Pu.Ma continuous lines (Italy) installed at PH Insulation. Immediate integration with further production processes makes the system unique. In order to guarantee the...

The minimum yield strength of stainless faces is shown in Table 5. The chemical composition of faces and their physical properties meet the requirements of GOST 5632-14 standard. PH Insulation uses steel sheets and rolls (GOST 19904-90) or similar imported products (AISI 304 for the food industry, and AISI 430 for general purposes). Table 5. Technical characteristics of metal facings of panels Minimum yield strength Maximum yield strength Ultimate tensile strength Total weight of zinc coating on both faces Average thickness of zinc coating Standard width of steel sheet Average thickness of...

in a controlled temperature. This, as well as all the previous stages, is very important for the correct shape of panels. Production lines are always assembled individually according to client’s requirements, so if you are told that a certain line is unique and customized, take such claims with a grain of salt. Image 2. A section of continuous line by Pu.Ma, Italy, installed in PH Insulation manufacturing facility.

CHAPTER 2: PARAMETERS AND FEATURES OF SANDWICH PANELS 2.1 DIMENSIONAL TOLERANCES Table 6. Dimensional tolerances of sandwich panels Parameter Deviation from flatness for measured distance on flat plane (L) Depth of metal profile ribs (roof panels) Depth of stiffeners on lightly profiled facings (wall panels)

Cover width Deviation from squareness 0.6% of the nominal cover width Deviation from straightness

2.0 mm for each meter length but not greater than 10 mm; 8.5 mm for each meter width for lightly profiled wall panels; 10 mm for each meter width for roof panels Pitch of profile (roof panels) 2.2 THERMAL CONDUCTIVITY, THERMAL TRANSMISSION, AND THERMAL RESISTANCE OF PU PANELS Thermal losses in buildings and other structures occur due to: 1. Transmission losses through floors, walls and ceilings; and 2. Ventilation losses as a consequence of permeable cladding (natural ventilation). Transmission losses can be reduced by using materials with lower thermal conductivity. Ventilation losses can...

and not on the shape or dimensions. Table 7. Thermal conductivity of the most popular materials Material Foam concrete Mineral wool Expanded polystyrene Urea formaldehyde foam Polyurethane foam (PUR/PIR) Usually, the declared thermal conductivity of both PUR and PIR foams is in the range of 0.021–0.022 W/m·K. According to EN 14509-2005 standard, the manufacturer must declare lambda 90/90 values that ensure that the declared thermal conductivity can be obtained for 90% of production within a 90% confidence level. Thermal conductivity (λdesign) is actually a more important for construction...