管道的熱損失（W/m)(金屬管道：保溫材料為玻璃棉：厚度為I；室外，風(fēng)速9m/see;已包括10％余量）
厚度I（mm)
溫差ΔT（℃）
公稱直徑 DN（mm）
8
15
20
25
32
40
50
65
80
100
150
200
250
300
350
400
4.0
4.6
5.3
6.2
7.3
8.0
9.5
11.1
13.0
16.0
22.5
28.5
34.9
40.9
44.7
50.7
30
7.0
8.1
9.4
12.2
14.5
16.8
19.8
24.4
34.2
43.4
53.2
62.3
68.0
77.1
8.3
10.9
12.7
15.0
16.5
19.6
22.8
26.7
33.0
46.3
58.7
71.9
84.2
92.0
104.3
60
12.8
14.7
16.9
23.1
25.5
30.2
35.1
41.2
50.9
71.4
90.5
110.8
129.9
141.8
160.8
5.0
5.6
6.3
8.4
9.2
10.8
12.4
14.4
17.6
24.3
30.5
37.1
43.3
47.2
53.4
6.7
7.6
8.6
9.8
11.4
12.5
14.6
19.5
23.8
32.8
41.3
50.0
58.6
63.8
72.2
10.2
11.7
13.2
15.1
19.2
25.9
30.0
36.0
50.6
63.6
77.4
90.4
98.4
111.4
14.2
18.2
20.8
24.1
26.4
30.9
35.5
50.3
69.4
87.3
106.3
124.0
135.1
152.9
18.3
20.7
23.4
26.8
31.1
34.1
39.8
45.8
65.0
89.7
112.8
137.2
160.2
174.5
197.4
120
22.7
25.6
29.0
33.2
38.6
42.2
49.3
56.7
65.9
80.4
111.0
139.6
169.9
198.3
216.1
244.4
140
27.2
30.8
40.0
46.4
50.8
59.4
68.3
79.3
96.8
133.5
168.0
204.4
238.6
259.9
294.0
4.3
4.8
5.4
6.1
7.7
8.9
10.1
11.6
14.1
19.1
23.9
28.9
33.6
36.6
5.8
6.5
10.4
12.0
13.7
15.7
19.0
32.3
39.1
45.5
49.4
55.8
9.0
11.3
18.5
21.1
29.3
39.9
49.8
60.3
70.1
76.2
86.0
12.3
13.8
15.5
20.0
21.9
25.4
33.3
40.2
54.8
68.4
82.7
96.2
104.6
118.1
15.9
17.8
26.0
28.3
37.3
43.0
52.0
70.8
88.3
106.8
124.2
152.4
19.7
22.1
24.8
28.1
32.2
40.6
46.2
53.3
64.4
87.6
109.3
132.3
153.9
167.3
188.8
23.7
26.5
29.8
33.8
38.8
48.8
55.6
64.1
105.4
131.5
159.1
185.1
201.2
227.1
160
27.9
31.2
45.6
49.7
57.4
65.5
75.4
91.1
124.1
154.8
187.3
217.9
236.9
267.3
180
36.2
46.0
52.9
57.5
66.5
75.8
105.5
143.7
179.3
216.9
252.2
274.3
309.5
5.9
9.1
11.8
13.4
16.1
21.7
26.9
37.5
40.7
12.9
14.0
18.1
33.4
41.4
49.9
57.8
62.7
70.6
11.2
17.7
22.0
24.9
45.9
56.8
86.1
96.9
20.1
24.7
28.4
32.1
36.7
44.0
59.2
73.4
102.4
111.1
125.1
30.6
54.5
73.3
90.9
109.4
126.8
137.6
154.9
21.5
26.6
29.9
34.0
36.8
42.3
47.9
54.7
65.6
88.2
131.6
152.5
165.5
186.4
25.3
31.3
35.2
40.1
56.3
77.2
103.9
128.7
179.5
194.9
219.4
29.2
32.5
50.2
57.6
65.2
74.6
89.4
120.3
149.0
179.4
207.9
225.6
254.0
4.4
5.2
7.9
8.8
9.9
15.2
27.3
7.4
10.0
12.1
13.5
15.3
17.9
23.5
28.6
39.0
42.1
47.1
14.8
16.6
18.6
20.9
24.6
39.2
46.6
53.5
64.7
11.9
14.3
24.0
31.8
41.6
60.2
69.1
83.5
23.6
29.7
33.5
39.3
51.5
74.5
85.5
92.4
103.4
19.4
21.4
32.0
35.7
40.3
47.3
61.9
89.6
102.9
111.12
124.4
22.9
25.1
27.8
37.7
47.4
55.7
72.9
88.8
121.1
130.9
146.4
29.1
36.1
38.7
43.7
48.7
54.9
64.5
84.4
102.8
122.2
140.3
151.5
169.5
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