56
Fig.E.2. Design of flow straightener of B type
3. Hole pattern in the flow straighteners is shown in Table E.1.
Table E.1. Hole coordinates in the flow straighteners of A and B type (D is
pipe inner diameter)
No.
X-axis
Y-axis
1
0
0
2
0
0,142
D
3
0
0.283
D
4
0
0.423
D
5
0.129
D
0.078
D
6
0.134
D
0.225
D
7
0.156
D
0.381
D
8
0.252
D
0
9
0.255
D
0.146
D
10
0.288
D
0.288
D
11
0.396
D
0
12
0.400
D
0.151
D
4. The flow straightener is installed in the pipeline at 1
2 DN of the pipeline
from the local resistance that is the last in the flow. When installing the
flow straightener, the required length of the straight section in front of the
PEA is defined as the distance from the hydraulic resistance to the PEA.
re_buf310_eng_doc1.0
