Thermal Properties

PE-X Pipe will not melt. This is due to the irreversable cross linking process which has changed the chemical structure of the base polyethylene.

Property
Value
Ignition Temperature °C
380
Specific Heat (J/kg/K)
2300
Density (g/cm³)
0.94
Thermal Expansion Coefficient (x10-6/K)
14.22

 

Thermal Linear Expansion

The table below represents expansion and contraction of PE-X tube in millimetres, resulting from a given change in temperature. The graph and table are calculated using the following equation.


Change in tube length = 0.1422 x Tube length x Change in temperature

 
Change in temperature °C
Length of tube in metres
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
1
1.4
1.7
2.0
2.3
2.6
2.8
3.1
3.4
3.7
4.0
4.3
4.6
4.8
5.1
5.4
5.7
2
2.8
3.4
4.0
4.6
5.1
5.7
6.3
6.8
7.4
8.0
8.5
9.1
9.7
10.2
10.8
11.4
4
5.7
6.8
8.0
9.1
10.2
11.4
12.5
13.7
14.8
15.9
17.1
18.2
19.3
20.5
21.6
22.8
6
8.5
10.2
11.9
13.7
15.4
17.1
18.8
20.5
22.2
23.9
25.6
27.3
29.0
30.7
32.4
34.1
8
11.4
13.7
15.9
18.2
20.5
22.8
25.0
27.3
29.6
31.9
34.1
36.4
38.7
41.0
43.2
45.5
10
14.2
17.1
19.9
22.8
25.6
28.4
31.3
34.1
37.0
39.8
42.7
45.5
48.3
51.2
54.0
56.9
12
17.1
20.5
23.9
27.3
30.7
34.1
37.5
41.0
44.4
47.8
51.2
54.6
58.0
61.4
64.8
68.3
14
19.9
23.9
27.9
31.9
35.8
39.8
43.8
47.8
51.8
55.7
59.7
63.7
67.7
71.7
75.7
79.6
16
22.8
27.3
31.9
36.4
41.0
45.5
50.1
54.6
59.2
63.7
68.3
72.8
77.4
81.9
86.5
91.0
18
25.6
30.7
35.8
41.0
46.1
51.2
56.3
61.4
66.5
71.7
76.8
81.9
87.0
92.1
97.3
102.4
20
28.4
34.1
39.8
45.5
51.2
56.9
62.6
68.3
73.9
79.6
85.3
91.0
96.7
102.4
108.1
113.8
22
31.3
37.5
43.8
50.1
56.3
62.6
68.8
75.1
81.3
87.6
93.9
100.1
106.4
112.6
118.9
125.1
24
34.1
41.0
47.8
54.6
61.4
68.3
75.1
81.9
88.7
95.6
102.4
109.2
116.0
122.9
129.7
136.5
26
37.0
44.4
51.8
59.2
66.5
73.9
81.3
88.7
96.1
103.5
110.9
118.3
125.7
133.1
140.5
147.9
28
39.8
47.8
55.7
63.7
71.7
79.6
87.6
95.6
103.5
111.5
119.4
127.4
135.4
143.3
151.3
159.3
30
42.7
51.2
59.7
68.3
76.8
85.3
93.9
102.4
110.9
119.4
128.0
136.5
145.0
153.6
162.1
170.6
32
45.5
54.6
63.7
72.8
81.9
91.0
100.1
109.2
118.3
127.4
136.5
145.6
154.7
163.8
172.9
182.0
34
48.3
58.0
67.7
77.4
87.0
96.7
106.4
116.0
125.7
135.4
145.0
154.7
164.4
174.1
183.7
193.4
36
51.2
61.4
71.7
81.9
92.1
102.4
112.6
122.9
133.1
143.3
153.6
163.8
174.1
184.3
194.5
204.8
38
54.0
64.8
75.7
86.5
97.3
108.1
118.9
129.7
140.5
151.3
162.1
172.9
183.7
194.5
205.3
216.1
40
56.9
68.3
79.6
91.0
102.4
113.8
125.1
136.5
147.9
159.3
170.6
182.0
193.4
204.8
216.1
227.5

For specific lengths or temperature variations not included in the above table please use this calculator.

Thermal Linear Expansion Calculator
Tube Length (m):
Change in Temperature (°C):

(mm):