Pressione d'esercizio max ammissibile per i raccordi in acciaio grado B

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Pressione d'esercizio max ammissibile per i raccordi in acciaio grado B

Diametro
nominale
pollici
Tipo di tubo
Spessore mm
Centrali termiche e di
riscaldamento fino a
400 °C kg/cm2
Condotte di aria
e gas fino a
230 °C kg/cm2
Raffinerie fino a 400 °C
olio-interno kg/cm2
Raffinerie fino a 40 °C
olio-esterno kg/cm2
3/4''
STD
2.87
70.9
192.5
85.0
194.6
XS
3.91
126.7
281.1
148.1
338.9
1''
STD
3.38
76.5
187.4
91.4
209.2
XS
4.55
127.4
266.9
149.0
341.0
1 1/4''
STD
3.56
52.5
159.1
80.4
184.1
XS
4.85
94.5
227.1
128.9
295.0
1 1/2''
STD
3.68
48.9
145.0
74.0
169.5
XS
5.08
88.9
209.2
120.7
76.1
2''
STD
3.91
44.2
124.5
65.8
150.6
XS
5.54
81.0
184.8
108.8
248.9
2 1/2''
STD
5.16
59.4
141.2
81.4
186.2
XS
7.01
94.8
197.7
122.5
280.4
3''
STD
5.49
53.4
124.5
73.1
167.4
XS
7.62
86.6
178.4
111.5
255.3
3 1/2''
STD
5.74
50.1
114.2
67.6
154.8
XS
8.08
81.4
165.5
105.1
238.5
4''
STD
6.02
47.4
106.5
64.0
146.5
XS
8.56
77.9
156.6
99.6
228.0
5''
STD
6.55
43.3
95.0
57.6
131.8
XS
9..52
71.9
142.5
91.4
209.2
6''
STD
7.11
40.6
87.3
53.9
123.4
XS
10.97
71.9
138.6
90.5
207.1
8''
STD
8.18
37.6
78.3
49.3
113.0
XS
12.70
65.5
124.5
82.3
188.3
10''
STD
9.27
35.3
71.9
45.7
104.6
XS
12.70
52.2
100.1
65.8
150.6
12''
STD
9.52
30.7
61.6
40.2
92.0
XS
12.70
43.9
84.7
55.8
127.6
14''
STD
9.52
28.0
56.5
36.6
83.7
XS
12.70
39.8
77.0
50.3
115.0
16''
STD
9.52
24.5
49.4
32.0
73.2
XS
12.70
34.9
66.7
44.8
102.5
18''
STD
9.52
21.7
43.7
28.3
64.8
XS
12.70
30.8
59.7
39.3
89.9
20''
STD
9.52
19.5
39.8
25.6
58.6
XS
10.70
27.7
53.9
35.7
81.6
24''
STD
9.52
16.3
33.0
21.0
48.1
XS
10.70
22.9
44.9
29.3
66.9
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