Law 10/91 and DPR 412/93 require that the hot water temperature at the point of use is 48 C + 5 and require the insulation of all piping.
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- Norma Ferguson
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1 4.4 HEAT LOSS Law 10/91 and DPR 412/93 require that the hot water temperature at the point of use is 48 C + 5 and require the insulation of all piping. The thickness of the insulation layer depends on its thermal conductivity and on the pipe diameter. PPR PIPING SYSTEM pipes, both insulated and non-insulated, have very low heat loss and allow to meet the required values as can be seen in the following tables. N.B.: Please contact NUPIGECO chnical Office for heat loss values according to different water speed, pipe SDR, thermal conductivity of the insulation layer and ambien temperature. mm mm NON-INSULATED PIPE Water temp. 40 C Speed 2 m/s SDR Ambient temperature 10 C 15 C 20 C Heat loss C every 10m of pipe ,25 0,21 0, ,18 0,15 0, ,13 0,11 0, ,09 0,08 0, ,07 0,06 0, ,05 0,04 0, ,04 0,03 0, ,03 0,02 0, ,02 0,02 0, ,02 0,01 0,01 SDR INSULATED PIPE Water temp. 40 C Speed 2 m/s Insulation layer 0,038 W/mk thickness Ambient temperature 10 C 15 C 20 C Heat loss C every 10m of pipe ,10 0,08 0, ,05 0,05 0, ,04 0,03 0, ,03 0,02 0, ,02 0,02 0, ,01 0,01 0, ,01 0,00 0, ,00 0,00 0, ,00 0,00 0, ,00 0,00 0,00 mm mm SDR NON-INSULATED PIPE Water temp. 40 C Speed 2 m/s SDR INSULATED PIPE Water temp. 40 C Speed 2 m/s Insulation layer 0,038 W/mk thickness Ambient temperature 10 C 15 C 20 C Heat loss C every 10m of pipe 25 7,4 0,17 0,14 0, ,4 0,12 0,10 0, ,4 0,09 0,07 0, ,4 0,07 0,06 0, ,4 0,05 0,04 0, ,4 0,04 0,03 0, ,4 0,03 0,02 0, ,4 0,02 0,02 0, ,4 0,02 0,01 0,01 1 7,4 0,01 0,01 0,00 Ambient temperature 10 C 15 C 20 C Heat loss C every 10m of pipe 25 7,4 9 0,05 0,04 0, ,4 9 0,04 0,03 0, ,4 9 0,03 0,02 0, ,4 12 0,02 0,01 0, ,4 15 0,01 0,00 0, ,4 15 0,01 0,00 0, ,4 17 0,00 0,00 0, ,4 18 0,00 0,00 0, ,4 18 0,00 0,00 0,00 1 7,4 18 0,00 0,00 0,00 PPR Piping System 111
2 s = Thickness of the insulation layer in mm with a conductivity value of W/mk = Outside air temperature in C = Water temperature inside the pipes in C %/% = Relative humidity of air PIPE 20 x 3,4 SDR 6 5 3,7 3,9 4,1 4,3 4,6 4,8 5,3 5,5 7 3,0 3,3 3,5 4,0 4,2 4,5 4,7 9 2,4 2,9 3,2 3,4 3,7 3,9 4,2 4, ,7 12,1 12,4 12,8 13,2 13,6 7 9,5 9,9 10,3 1 11,1 1 11,9 12, ,4 8,8 9,2 9,6 10, ,7 4.5 ANTI-CONDENSATION INSULATION IN AIR CONDITIONING SYSTEMS The tables below indicate the minimum thickness of insulation required for PPR PI- PING SYSTEM pipes to avoid that moisture present in the air turns into dew on the pipes in air conditioning systems. PIPE 63 x 1 SDR 6 5 2,8 3,1 3,4 3,7 4,0 4,2 4,5 4,8 5,1 7 2,1 2,4 3,0 3,3 3,6 4,1 4,4 9 1,4 1,7 2,0 2,3 2,6 2,9 3,2 3, ,0 12,5 13,0 13,5 14,0 14,5 1 15,5 7 10,1 1 11,2 11, ,2 1 14,3 9 8,7 9,2 9,8 10,3 1 11,4 12,0 12,5 13,1 PIPE 25 x 4,2 SDR 6 5 3,6 4,1 4,3 4,6 4,8 5,1 5,3 5,6 7 3,0 3,2 3,5 3,7 4,0 4,2 4,5 4,8 9 2,3 2,6 2,9 3,1 3,4 3,7 3,9 4,2 4, ,7 12,1 12,5 12,9 13,3 13,7 14,1 7 9,7 10,2 1 11,0 11,4 11,9 12,3 1 13,1 9 8,6 9,0 9,5 9,9 10,3 10,8 11,2 11,7 12,1 PIPE 32 x 5,4 SDR 6 5 3,5 4,0 4,3 4,5 4,8 5,3 5,5 7 2,9 3,1 3,4 3,6 3,9 4,2 4,4 4,7 9 2,5 3,0 3,3 3,6 4,1 4,4 5 11,1 11,6 12,0 12,4 12,9 13,3 13,7 14,1 14,6 7 10, , ,1 13,5 9 8,7 9,2 9,7 10,1 1 11,1 11,6 12,0 12,5 PIPE 40 x SDR 6 5 3,4 3,6 3,9 4,4 4,7 4,9 4,9 5,2 5,5 7 3,0 3,2 4,1 4,3 4,3 4,6 4,9 9 2,0 2,3 2,6 3,1 3,4 3,7 3,7 4,0 4, ,8 12,3 13,2 13,6 14,1 14,1 14, ,1 1 11,0 13,0 12,5 12,9 12,9 13,4 13,9 9 8,8 9,3 9,8 10,8 1 11,8 11,8 12,3 12,8 PIPE 50 x 8,4 SDR 6 5 3,1 3,4 3,7 4,0 4,2 4,5 4,8 5,3 7 2,4 3,0 3,3 3,6 4,1 4,4 4,7 9 1,7 2,0 2,3 2,6 2,9 3,2 3,5 4, ,9 12,4 12,9 13,4 1 14,3 14,8 15,3 7 10,1 1 11,1 11,6 12,1 12,6 13,1 13,6 14,1 9 8,8 9,3 9, ,4 11,9 12,4 13,0 PIPE 75 x 12,5 SDR 6 5 2,3 2,6 2,9 3,2 3,5 4,1 4,4 4,7 7 1,6 1,9 2,5 2,8 3,1 3,4 3,7 4,0 9 1,2 1,8 2,1 2,4 3,0 3,3 5 11,1 11,6 12,1 12,6 13,1 13,6 14,1 14,6 15,1 7 9,7 10,2 1 11,2 11, ,2 13,7 9 8,2 8,8 9,4 10,0 1 11,2 11,8 12,4 13,0 PIPE 90 x 15 SDR 6 5 1,8 2,1 2,4 3,0 3,3 3,6 3,9 4,2 7 1,1 1,7 2,0 2,3 2,6 2,9 3,2 3,5 9 0,3 1,2 1,8 2,1 2,4 5 10,8 11,4 11,9 12,5 13,0 13,6 14,1 14,7 15,2 7 9,4 10,0 1 11,1 11, , ,9 8,5 9,0 9,6 10,1 1 11,2 11,8 12,3 PIPE 110 x 18,4 SDR 6 5 1,6 1,9 2,5 2,8 3,1 3,4 3,7 7 0,8 1,1 1,4 1,7 2,0 2,3 2,6 2,9 9 0,0 0,1 1,0 1,6 1, ,1 11, ,3 1 14,4 14,9 7 9,0 9,6 10,1 1 11,2 11,8 12,3 12,9 13,4 9 8,1 8,7 9,3 9,9 1 11,1 11,7 12,3 PIPE 125 x 20,8 SDR 6 5 0,8 1,1 1,4 1,7 2,0 2,3 2,6 2,9 3,2 7 0,0 0,3 1,2 1,8 2,1 2,4 9 0,0 0,0 0,0 0,2 0,8 1,1 1,4 1,7 5 10,2 10,8 1 11,9 12,4 13,0 13,5 14,1 14,6 7 8,6 9,2 9,8 1 11,0 11,6 1 12,8 13,4 9 7,1 7,7 8,3 8,9 9,5 10, ,9 112 PPR Piping System
3 PIPE 20 x 2,8 SDR 7,4 5 4,0 4,3 4,5 4,7 5,2 5,4 5,6 7 3,2 3,5 3,7 4,0 4,2 4,5 4,7 5,2 9 2,6 2,9 3,1 3,4 3,6 3,9 4,1 4,4 4, ,0 11,4 11,8 1 12,6 13,0 13, ,6 10,0 1 10,8 11,2 11,6 12,0 12,4 12,8 9 8,5 8,9 9,3 9,7 10, ,7 PIPE 25 x 3,5 SDR 7,4 5 4,0 4,3 4,5 4,7 5,2 5,4 5,7 7 3,2 3,5 3,7 4,0 4,2 4,5 4,7 5,2 9 2,5 2,8 3,1 3,4 3,6 3,9 4,1 4,4 4, ,7 12,1 12,5 12,9 13,3 13,7 14,1 7 9,8 10,3 1 11,2 11,6 12,1 12,5 13,0 13,4 9 8,7 9,2 9,6 10,1 1 11,0 11,4 11,9 12,3 PIPE 32 x 4,4 SDR 7, ,3 4,5 4,7 5 5,2 5,4 5,7 7 3,1 3,4 3,6 3,9 4,1 4,4 4,6 4,9 5,1 9 2,4 3 3,3 3,5 4 4,3 4, , ,1 13,6 14,0 14,5 14,9 7 10,2 1 11,1 11,6 12,0 12,5 12,9 13, ,9 9,4 9, ,4 11,9 12,4 12,9 PIPE 40 x 5,5 SDR 7,4 5 3,6 3,9 4,1 4,4 4,6 4,9 5,1 5,4 5,6 7 2,9 3,2 3,4 3,7 4,0 4,3 4,5 4,8 5,1 9 2,5 2,8 3,1 3,4 3,7 3,9 4,2 4, ,0 12,4 12,9 13,4 13,9 14,3 14,8 15,3 7 10,3 10,8 11,2 11,7 12,1 12,6 13,0 13,5 13,9 9 9,0 9,5 10,0 1 11,0 1 12,0 12,5 13,0 PIPE 50 x 6,9 SDR 7,4 5 3,5 4,0 4,3 4,5 4,8 5,1 5,3 5,6 7 3,0 3,2 3,5 4,1 4,3 4,6 4,9 9 2,0 2,3 2,6 2,9 3,2 3,5 3,7 4,0 4,3 5 11, ,2 13,7 14,2 14,7 15,2 15, ,4 11,9 12,4 12,9 13,4 13,9 14,4 9 9,0 9,5 10,1 1 11,2 11,7 1 12,8 13,3 PIPE 63 x 8,7 SDR 7,4 5 3,2 3,5 4,0 4,3 4,6 4,9 5,2 5,4 7 2,5 2,8 3,1 3,4 3,7 4,0 4,2 4,5 4,8 9 1,7 2 2,3 2,6 2,9 3,2 3,5 4,1 5 11,8 12,3 12,8 13,3 1 14,3 14,8 15,3 15, ,0 1 12,1 12,6 13,2 13,7 14,3 14,8 9 9,0 9,6 10,1 1 11,2 11,8 12,4 12,9 13,5 PIPE 90 x 12,5 SDR 7,4 5 2,6 2,9 3,2 3,5 4,1 4,4 4, ,9 2,5 2,8 3,1 3,4 3,7 4 4,3 9 1,1 1,4 1,7 2,1 2,4 3 3,3 3,6 5 11,8 12,3 12,9 13,4 13,9 14, ,6 16,1 7 10,3 1 11, ,6 13,1 13,7 14,2 14,8 9 8,8 9, ,1 11,7 12,3 12,9 13,5 PIPE 110 x 15,2 SDR 7,4 5 2,3 2,6 2,9 3,2 3,5 4,1 4,4 4,6 7 1,9 2,5 2,8 3,1 3,4 3, ,8 1,1 1,4 1,7 2,1 2,4 3 3, ,8 13,4 13,9 14,5 15,1 15,6 16, ,9 12,5 13,1 13,7 14,3 14,8 9 8,5 9,2 9,8 1 11,1 11,7 12,3 12,9 13,5 PIPE 125 x 17,1 SDR 7,4 5 2,5 2,8 3,1 3,4 3,7 4,0 4,3 4,5 7 1,4 1,8 2,1 2,4 3,0 3,3 3,6 3, ,0 1,6 2,0 2,3 2,6 2,8 3, ,0 12,6 13,2 13,7 14,3 1 15,5 16,0 7 9,8 1 11,1 11,7 12,3 13,0 13,5 14,0 14, ,3 9,0 9,7 10,3 11,0 1 12,0 12,8 13,2 PIPE 1 x 21,9 SDR 7,4 5 0,8 1,1 1,4 1,7 2,0 2,3 2,6 2,9 3,2 7 0,0 1,0 1,6 1,9 2,5 9 0,0 0,0 0,0 0,3 1,2 1, ,1 11,7 12,3 12,9 13,5 14,1 14,7 15,3 7 8,9 9,5 10, ,9 12,5 13,1 13,7 9 7,2 7,9 8,5 9,2 9,8 1 11,1 11,8 12,4 PIPE 200 x 18,2 SDR ,7 2,0 2,3 2,6 2,9 3,2 3,5 4,1 7 1,2 1,8 2,1 2,4 3,0 3,3 9 0,1 0,8 1,1 1,4 1,7 2,0 2,3 2, ,8 13,5 14,1 14,7 15,3 16,0 16,6 7 9, ,9 12,5 13,1 1 14,5 15,1 9 8,2 8,9 9,6 10,3 11,0 11,7 12,3 13,0 13,6 PIPE 250 x 2 SDR ,7 2,0 2,3 2,6 2,9 3,2 3,5 4,1 7 1,2 1,8 2,1 2,4 3,0 3,3 9 0,1 0,8 1,1 1,4 1,7 2,0 2,3 2, ,8 13,5 14,1 14,7 15,3 16,0 16,6 7 9, ,9 12,5 13,1 1 14,5 15,1 9 8,2 8,9 9,6 10,3 11,0 11,7 12,3 13,0 13,6 PIPE 75 x 1 SDR 7,4 5 2,5 2,8 3,1 3,4 3,7 3,9 4,2 4,5 4,8 7 1,8 2,1 2,4 3,0 3,3 3,5 4,1 9 1,0 1,6 1,9 2,6 2,9 3,2 3,5 5 11,4 11,9 12,4 13,0 13,5 14,0 14,5 1 15,6 7 10,0 1 11,1 11,6 12,1 1 13,2 1 14,3 9 8,5 9,1 9,7 10,2 10,8 1 11,9 12,5 13,0 PPR Piping System 113
4 4.5.1 MINIMUM INSULATION THICKNESS RECOMMENDED FOR PPR PIPES According to the current standard in force UNI EN (Hygrothermal performance of systems, buildings and industrial installations - Calculation of water vapor diffusion - Insulation systems for cold pipes), hot and cold fluid distribution networks in heat systems must be insulated with an insulating layer with thickness values as per the following table depending on: the diameter of the non-insulated pipe; the usable thermal conductivity (W/mK) of the insulation material at an average temperature of 40 C. Diameter of the pipe < 20 mm from 20 to 39 from 40 to 59 from to 79 from to 99 > 100 Usable thermal conductivity of the insulation material W/m C , , , , , , , , , , , NOTES - For values of usable thermal conductivity of the insulation material other than those indicated in the table, the minimum thickness of the insulation material is obtained by linear interpolation of the data shown in the table. - Vertical pipe risers shall be placed outside the thermal insulation of the building towards the inside of the building and the minimum thickness of the insulation layer resulting from the table shall be multiplied by. - For pipes installed inside structures that do not overlook either outside or on unheated rooms, the thickness values indicated in the table shall be multiplied by 0,3. - Hot air channels for winter heating placed in unheated spaces should be insulated with an insulation thickness not lower than the insulation thicknesses indicated in the table for pipes with an outside diameter from 20 to 39 mm. The standard also indicates some installation requirements, in particular: all piping shall be uniformly insulated, without chokes or reductions in thickness, ensuring the perfect welding of both the joints of the PPR system and the insulation material, insulating also elbows, fittings, flanges, valves and gate valves and everything that could be used as a thermal bridge. 114 PPR Piping System
5 4.6 HEAD LOSS UNIT HEAD LOSS FOR PPR PIPING SYSTEM PIPES SDR 6 WITH WATER TEMPERATURE AT 10 C , , , , , x 10 0, , x3,4 2 0,14 8 0, , , , , ,83 25x4,2 0,09 3 0,18 4 0,23 6 0, , , , ,85 32x5,4 1 0,11 2 0,14 2 0,17 4 0,23 6 0,28 8 0, , , , , , ,98 40x 50x8,4 63x1 Head loss in mm c.a./m Average speed in m/s 0,15 2 0,18 3 0,22 4 0,26 5 0, , , , , , ,63 0,09 0,11 0,14 1,44 0,16 1,8 0,19 0,21 2,69 0,24 3,3 0,27 4,1 0,30 5,3 0,35 7, , , ,05 0,09 5 0,10 6 0,12 0,13 0,84 0,15 1 0,17 0,19 1,6 0,22 0,26 0,29 3,4 0,32 4, ,7 6,5 7,6 1 8,5 4 9, , , , , , , , , , , , , , , , , x5,4 40x 143 1, ,16 50x8, , , , , , ,31 63x , , , , 66 1, , , , ,53 75x1 7,9 9,2 1 12,1 15,3 18, ,02 26,9 1,12 31,4 36,1 2 41,2 46,6 3 61,4 1,78 77,9 2,04 96, ,2 2,55 161,1 3,06 90x12,5 2,8 0,35 3,9 4,5 5,1 0 6,4 7,9 4 9, ,1 15,1 2 17,3 9 19,5 25,7 1,24 32,6 1,41 40,2 9 48,5 1,77 67,2 2,12 88,6 2, ,83 139,3 3,18 110x15,2 3,7 4,4 5,1 5,9 2 9,9 12,6 5 15,5 18,7 25,9 34,2 43,4 1,90 53,6 64,8 77 2,61 90,0 2,85 104,0 3,09 125x20,8 3,1 3,6 1 4,1 5 5, ,3 0,82 10,0 2 13,9 1,10 18,3 1,28 23,2 1,46 28,7 1,65 34,7 1,83 41,1 48,1 0 55,6 71,9 5 92,1 3,11 PPR Piping System 115
6 UNIT HEAD LOSS FOR PPR PIPING SYSTEM PIPES SDR 7,4 WITH WATER TEMPERATURE AT 10 C 0,10 3 0, , , x4,2 16,9 0, ,4 9 81,4 8 0, ,6 0, , , ,3 1, , ,7 2,16 0, , , , , , 5.7 1, 6.4 2, , , x4,4 5,2 0,24 40x5,5 50x6,9 63x8,7 75x1 90x12,5 10,2 0,35 Head loss in mm c.a./m 1 Average speed in m/s 24,5 9 33,6 43,9 55,3 5 67,9 8 96, ,42 129, ,0 165,9 1,77 185,9 1,89 206,8 228,7 2,13 11,7 5 15,3 3 19,2 23,6 8 28,3 6 33,4 38,9 1 44, ,4 1,14 64,3 7 1,29 79,1 6 95, ,2 1,82 172,3 2,12 0,39 8,3 4 9,9 9 11,7 3 13,6 8 15,6 3 17,8 8 20,0 3 22,4 8 24,9 27,6 0,87 33,1 7 45,6 1,17 59,9 6 75,8 5 93,3 1,75 112,5 1,94 133,2 5,2 0 6,0 9 8,3 9,2 5 11,1 15,2 3 20,0 25,2 8 31,1 1,10 2,00 44,3 5 51,6 1,47 69,5 9 4,9 8,8 11,1 9 13,6 8 16,4 0,87 19, ,04 26,1 1,13 3,7 4,7 5,7 4 6,9 0, 8,2 9,5 2 11,0 8 2, , , , , , , , , , , , , , , , , , , , , , , x6,9 63x8,7 67,9 1,71 7 1, ,0 2,45 158,0 6 75x1 29,8 33,6 0 44,2 2 56,0 1,73 69,1 1,95 83,4 2,17 98,9 115,6 2, 90x12,5 12,5 0,84 14,1 0 18,6 1,05 23, ,4 1,81 55,9 1,96 6 2, ,0 2,41 100, x15,2 4,6 6 5,4 0, 7,1 0 8,9 0, 11,0 0 13,3 1,00 15,7 1,11 18,4 2 1,29 24,2 1,41 27, ,61 97,9 1,81 45,8 54,3 1 63,5 2,41 73,3 2,61 125x17,1 2,9 4 4,8 2 5,9 9 7,1 7 8,4 9, ,00 12,9 1,08 14,6 16,3 1,24 20,2 9 24,4 4 28,9 1,70 3 1,85 39,0 44,5 2,16 5 2,32 56,6 2,47 63,1 2,63 1x21,9 2,6 3,0 3,5 4,0 4,5 5 6,2 4 8,9 1,04 1 1,13 12,0 1,23 13,6 2 15,4 1,41 17,1 0 19,3 1, 25,9 1,89 5 2,83 UNIT HEAD LOSS FOR PPR PIPING SYSTEM PIPES SDR 11 WITH WATER TEMPERATURE AT 10 C 10, , , , , x18,2 250x2 1,46 1,73 2,02 2,33 2 2,65 0 0, , , , , , ,00 3,37 6 3,75 4,16 4,58 0 1,03 9 1, , , , , ,73 17,47 1,90 1,72 5 2,56 6 3,56 1 4,69 5, , , , ,61 26,14 3 2,62 7,38 7 8, , 1,67 12,40 1,82 14,74 70, , , ,39 2,13 18, ,88 2,43 25, PPR Piping System
7 UNIT HEAD LOSS FOR BLUE PPR FIBER GLASS PIPES SDR 11 WITH WATER TEMPERATURE AT 10 C (32 TO 125) 0,10 3 0, , , , , , , , , , , 5.7 1, 6.4 2, , , x2,8 48,4 96, ,0 1,23 321,6 1,84 531,8 2,46 787,0 3,07 25x3,5 17,0 0, , ,6 184, ,3 1, ,36 492, ,14 32x2,9 2,9 0,19 40x3,7 50x4,6 63x5,8 75x6,8 90x8,2 6,5 0,30 Head loss in mm c.a./m 9,4 Average speed in m/s 1 18,9 6 24,7 5 31,1 4 38,1 45,8 3 54,1 1,02 63,0 1,11 72,1 82,5 0 93, ,2 1,48 116,0 8 8,8 11,1 13,6 4 16,3 0, 19,2 22,3 2 25,7 8 29,2 0,84 33,0 0 36,9 6 41,0 1,02 43,3 1,08 54,5 1,20 75,2 1,44 98,7 1,68 0,31 4,7 0,34 5,6 0,38 6,6 7,7 8,9 0 10,1 4 11,4 1 14,1 5 15,8 9 18,8 6 25,8 2 33,9 42,9 52,8 8 63,6 3 73,2 1,68 3,0 0,31 3,4 0,34 4,3 0,39 4,7 1 5,2 6,3 8, ,3 7 21,1 6 21, ,2 33,6 1,25 0,34 3,7 1 4,9 6,1 4 9,1 8 9, ,5 14,4 2,1 2,6 0,38 4,5 5,3 6 6,1 2, , , , , , , , , , , , , , , , , , , , , , x4,6 63x5,8 38,3 5 43,3 1,45 57,0 1,69 7 1,93 75x6,8 16,4 18,5 1,01 24,4 3 1,4 38,1 46,0 1,69 54,5 1,86 63,6 2,0 90x8,2 6,9 7,8 10,3 0,82 13,0 16,0 1,1 19,3 22,9 1,29 2 1,4 35,2 1,6 44,7 1,9 110x10 3,0 3,9 5 6,1 7,4 9 8,8 10,2 13,4 1,1 17,1 21,1 1,4 25,4 7 30,1 1,73 35,2 1, x11,4 1,6 2,1 3,3 4,0 4,8 5,6 7,3 9,3 1,0 1 1,1 1 16,4 4 19,2 1,46 22,1 8 25,3 1,71 28,6 1,83 32,1 1,95 PPR Piping System 117
8 UNIT HEAD LOSS FOR BLUE PPR FIBER GLASS PIPES SDR 11 WITH WATER TEMPERATURE AT 10 C (1 TO 400) , , , , , , , , , , , , , , , , , x14,6 1,2 1 1,7 2,3 2,9 3,5 4,2 4 0,82 5,9 0,89 6,8 7 7,7 1,04 8,8 1,12 9,8 11,0 1,27 12,1 4 13,4 1,41 14,7 1,49 21,9 1, x18,2 0,24 0,26 0,29 0,8 1,0 0,38 1,2 1,7 2,0 2,3 2 3,0 3,4 6 4,2 4, ,7 1 1,9 250x2 0,1 0,15 0,2 0,17 0,2 0,18 0,2 0,18 0,3 0,21 0,27 0,30 0,8 0 1,0 1,2 9 1,4 5 1,6 8 1,7 2,6 6 3,6 1 4,7 6,0 315x28,6 0,8 1,2 2, x36,3 0,3 0, , , , , , , , , , , , , x14,6 200x18,2 21,6 26,1 250x2 7,4 7 8, ,67 12,4 1,82 14,3 1,98 16,4 2,13 18, ,43 315x28,6 2,4 2,9 6 3,5 1,05 4,1 1,15 4,9 1,26 5,4 4 6,1 1,44 6,9 3 8,5 1,72 10,3 1,92 1 2,11 400x36,3 0, , ,7 1,9 0,89 5 3,3 3,9 1 4,5 5,2 4 6,0 6,8 1, PPR Piping System
9 4.7 FITTING HEAD LOSS (DIN 1988) LOCAL RESISTANCE COEFFICIENTS R FOR PPR PIPING SYSTEM FITTINGS Figure No. Graphic symbol Resistance coefficient r 90 Elbow 90 2,0 Male threaded elbow 90M 45 Elbow 120 e Reduced e e union Reduced e e union Reduced e e union Reduced e R R R R 1,8 3,6 2,6 4,2 9 Threaded e 130F 0,8 Adapter up to 2 sizes Adapter from 3 sizes Coupler 270 0,25 Male threaded union 270M Reduced male threaded union 270RM The table shows the head loss z with a coefficient r = 1 for water transport at 10 C at different v flow rate values (m/s). v m/s 0,1 0,2 0,3 0,8 1,0 1,1 1,2 1,4 1,6 1,7 1,8 1,9 2,0 2,1 2,3 2,4 2,5 Head loss z (mbar) 0,1 0,2 0,8 1,8 2,5 3,2 4,1 6,1 7,2 8,5 9,8 1 12,8 14,5 16,2 18,1 20,0 22,1 24,2 26,5 28,8 3 v m/s 2,6 2,8 2,9 3,0 3,1 3,2 3,3 3,4 3,5 3,6 3,7 3,9 4,0 4,1 4,2 4,3 4,4 4,5 4,6 4,7 4,8 4,9 Head loss z (mbar) 3 36,5 39,2 42, mbar = 10,1 mm c.a. The local pressure drop z is the result of the formula z = 5v2 r and the total head loss of the system is the sum of the distributed head loss and the total of local head loss z. PPR Piping System 119
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