Expansion and contraction in piping systems may be accommodated in a number of ways including, but not limited to, piping design and layout, material selection, and the inclusion of expansion joints.
Temperature change is 60 – 10 = 50°C Enter the chart at 50°C, read up to the ABS line (#4), and then across to the mm scale. 47 mm/10 m of pipe therefore the change in length over 20 m is 20/10 X 47 94 mm