Pipe wall thicknesses for welded flanges (EN 1092-1:2013-04)
valve
Ø
PN 2.5
Sp
PN 6
PN 10
PN 16
PN 25
PN 40
PN 63
PN 100
17.2
2.0
21.3
26.9
2.3
2.6
33.7
42.4
2.9
48.3
60.3
3.2
76.1
3.6
88.9
4.0
114.3
5.0
139.7
4.5
6.3
168.3
5.6
7.1
219.1
10.0
273.0
8.8
12.5
323.9
8.0
11.0
14.2
355.6
16.0
406.4
457
508
610
711
813
914
1,016
17.5
1,219
1,422
1,626
9.0
Excerpt from Table A.1 in EN 1092-1:2013-0 — wall thickness for type 11
A Ø
Outer diameter
Wall thickness
PN
Nominal pressure stage
The pressure and temperature ratings of flanges is based on the material groups. The following materials and groups are customary in the area of steam boilers:
Material group
Description
Material number
3E0
Unalloyed steels with guaranteed strength characteristics at higher temperatures
1.0352 P245 GH 1.0460 P250 GH
3E1
Unalloyed steels with defined characteristics up to 400°C, upper yield point > 265N/mm²
1.0426 P280 GH
4E0
Low alloy steels with 0.3% molybdenum
1.5415 16Mo3
12E0
Standard carbon content, stabilised with Ti or Nb
1.4541 X6CrNiTi18-10 1.4550 X6CrNiNb18-10 1.4941 X6CrNiTiB18-10
15E0
Standard carbon content, alloyed with molybdenum, stabilised with Ti or Nb
1.4571 X6CrNiMoTi17-12-2 1.4580 X6CrNiMoNb17-12-2
Pressure-temperature assignment
1) Source: EN 1092-1:2013-04 Table 9, G.2.2, G.3.2, Table D.1
Notices regarding the following tables and diagrams:
PN10
TS [°C]
RT
100
150
200
250
300
350
400
450
460
470
480
490
500
510
520
530
PS [bar]
9.2
8.3
7.6
6.9
6.4
5.9
–
9.7
7.3
8.5
7.4
5.4
4.9
4.4
3.5
2.8
2.2
Excerpt from table G.2.1–3 – PN 10 for ferritic materials
550
560
570
580
590
600
9.9
9.3
8.4
7.9
7.2
7.0
6.7
6.1
9.8
7.8
7.5
6.0
5.5
Excerpt from table G.4.1–3 – PN 10 for austenitic materials
PN16
14.8
14.0
13.3
12.1
10.2
9.5
5.2
15.6
12.9
11.8
13.7
11.9
9.4
8.6
Excerpt from table G.2.1–4 – PN 16 for ferritic materials
15.8
14.9
14.1
13.4
12.7
12.2
11.6
11.3
10.8
8.9
8.1
6.5
12.8
12.4
12.0
11.7
10.7
Excerpt from table G.4.1–4 – PN 16 for austenitic materials
25.0
23.2
22.0
20.8
19.0
8.2
24.4
20.2
18.4
10.1
21.4
18.6
14.7
13.5
12.3
Excerpt from table G.2.1–5 – PN 25 for ferritic materials
24.7
23.3
22.1
21.0
19.8
19.1
18.5
18.1
17.7
16.9
15.3
11.4
24.5
20.1
19.5
18.8
18.3
16.7
15.2
13.8
Excerpt from table G.4.1–5 – PN 25 for austenitic materials
40.0
37.1
35.2
33.3
30.4
27.6
25.7
23.8
13.1
39.0
32.3
29.5
16.1
34.2
29.9
25.6
23.6
21.6
19.7
11.2
Excerpt from table G.2.1–6 – PN 40 for ferritic materials
39.6
37.3
35.4
31.8
30.6
29.7
29.0
28.3
27.0
22.4
20.3
18.2
16.3
39.2
32.1
31.2
30.0
29.6
29.3
26.8
24.3
Excerpt from table G.4.1–6 – PN 40 for austenitic materials
63.0
58.5
55.5
52.5
48.0
43.5
40.5
37.5
20.7
61.5
51.0
46.5
25.5
54.0
47.1
40.3
37.2
34.1
31.0
27.9
22.2
Excerpt from table G.2.1–7 – PN 63 for ferritic materials
62.4
58.8
55.8
53.1
50.1
46.8
45.7
44.7
42.6
38.7
28.8
25.8
61.8
50.7
49.2
47.4
46.6
46.2
42.3
38.4
34.8
Excerpt from table G.4.1–7 – PN 63 for austenitic materials
Medium
Area of application
Recommended speed
Steam
0 –1 bar
20 – 25m/s
1 – 40 bar
30 – 40m/s
Water
Suction line
0.4 (0.25 – 0.6) m/s
Pressure line
2 (1.5 – 3) m/s
Condensate
Steam fraction
15 m/s
Water fraction
2 m/s
Flue gas
16.5 m/s
Oil
Light fuel oil intake side
0.5 m/s
Light oil discharge side
1 m/s
Heavy fuel oil intake side
0.3 m/s
Heavy fuel oil discharge side
Natural gas
No specifications Design via pressure loss
Standard design speeds (recommended speeds) for pipework sizing
Shut-off valve, servovalve, butterfly valve
DN
Kvs value
Pressure loss coefficient ζ 1)
Shut-off valve
Servovalve
Butterfly valve
15
5.3
4
5.1
0.9
20
2.4
25
12
10
26
4.3
6.2
1.7
32
16
26.5
0.7
40
28.5
49.6
5
0.4
50
43
116
0.5
65
75
63
259
0.3
80
105
377
170
160
763
125
270
1,030
0.2
405
1,790
675
3,460
1,090
5,070
1,460
7,430
2,010
10,320
2,640
13,290
Shut-off valve, servovalve, butterfly valve 1) The pressure loss coefficient ζ is relative to the nominal diameter DN.
Intermediate flange-type non-return valve, non-return valve, dirt trap
ZIntermediate flange-type non-return valve
Non-return valve
Dirt trap
Intermediate flange-type non-return valve
5.7
4.2
2.5
17.8
17.9
26.1
27.5
36.7
3.0
46
48
61
4.7
2.7
69
77.6
98.6
87
109
146
8.7
3.1
122
168
234
251
376
389
394
664
652
5.8
1,017
1,225
1,446
1,873
3.7
2,042
2,725
4,167
Pressure loss of water vapour and other gases
Pressure loss of water vapour and other gases with isothermal flow
with isothermal flow T2 = T1
p1
Pressure upstream of the pipe section [Pa]
p 2
Pressure downstream of the pipe section [Pa]
λ
Pipe friction coefficient
l
Length of pipe [m]
d
Diameter of pipe [m]
ζ
Pressure loss coefficient
For calculation of pressure loss up to consumer ζ =
+
ζ steam extraction
Tab. Shut-off valve, servovalve, butterfly valve
ζ extension/availability
as a rule following steam extraction
n elbow ∙ ζ elbow
Guide value ζ90° elbow ≈ 0.5
ζ valves
ζ consumer inlet
if applicable (can be disregarded as a rule)
ρ
Density of flowing medium in kg/m³
u
Average speed at pipe inlet
T1
Temperature of the medium at the pipe inlet
T2
The deviation compared to adiabatic flow can normally be disregarded.
Pressure loss of liquids
Conversion of Kv value, pressure loss coefficient ζ and flow coefficient Cv
Conversion of Kv value of a valve to the pressure loss coefficient ζ
Conversion of pressure loss coefficient ζ of a valve to the Kv valve
Conversion of Cv value (flow coefficient) in metric systems to the Kv value