158 * Date in this document are purely reference values and changes slightly depending on a production method, etc. of the test piece. Please be noted that these data cannot be applied to products directly. * Values in the table are maximum working pressure in water and are not applicable for chemical solutions other than water. * These values are calculated based on a simple work condition (temperature and pressure are consistent and no influence of ultraviolet rays) with safety factor of 2 at the time of elapse of service life. (Max.=1.0 MPa) * These data are experimental values and do not guarantee the performance. * These figures are not applicable to processed products. * Assume maximum working pressure of threaded connection part to be 75% of this value. (SDR11/PN10) (Unit: MPa) (SDR26/PN4) (Unit: MPa) PP pipe has a creep phenomenon specific to plastics, and the strength under a specific pressure is involved in temperature and time. Basic Property Maximum Working Pressure by Temperature (Relationship of Temperature, Pressure and Service Life) Relationship between Working temperature/Period and Maximum Working Pressure Working Temperature 10｢ｪC 20｢ｪC 30｢ｪC 40｢ｪC 50｢ｪC 60｢ｪC 70｢ｪC 80｢ｪC 90｢ｪC Service Life 1 year 1.00 1.00 1.00 0.90 0.77 0.64 0.50 0.41 0.33 5 years 1.00 1.00 0.96 0.81 0.69 0.57 0.44 0.35 0.24 10 years 1.00 1.00 0.92 0.78 0.66 0.54 0.42 0.29 0.20 25 years 1.00 1.00 0.87 0.73 0.62 0.51 0.35 0.23 . 50 years 1.00 1.00 0.83 0.70 0.59 0.48 0.30 . . Working Temperature 10｢ｪC 20｢ｪC 30｢ｪC 40｢ｪC 50｢ｪC 60｢ｪC 70｢ｪC 80｢ｪC 90｢ｪC Service Life 1 year 0.40 0.40 0.40 0.36 0.31 0.25 0.20 0.17 0.13 5 years 0.40 0.40 0.38 0.33 0.27 0.23 0.18 0.14 0.10 10 years 0.40 0.40 0.37 0.31 0.26 0.22 0.17 0.12 0.08 25 years 0.40 0.40 0.35 0.29 0.25 0.20 0.14 0.09 . 50 years 0.40 0.40 0.33 0.28 0.23 0.19 0.12 . . Features Value Unit Test Method Specific Gravity 0.91 . 0.92 ― JIS K 7112 Tensile Strength (Yield) 35 MPa JIS K 7113 Tensile Strength (Breakage) > 150 ％ JIS K 7113 Tensile Elasticity 1340 MPa JIS K 7113 Izod Impact Value 23｢ｪC 10 . 13 (With notch) 0｢ｪC 3 . 5 KJ/m2 JIS K 7110 -20｢ｪC 3 . 4 Specific Heat 2.2 J/g｢ｪC JIS K 7123 Heat Conductivity 0.21 W/m･K JIS A 1412 Vicat Softening Point 158 ｢ｪC JIS K 7206 Linear Expansion Coefficient 1.1×10.4 1/｢ｪC Deflection Temperature Under Load 0.45MPa 106 ｢ｪC JIS K 7191 Volume Resistivity 2.2×1016 Ω-cm JIS K 6911 Permittivity 2.4 − JIS K 6911 Water Absorption 23｢ｪC < 0.05 ％ JIS K 7209 Technical Document