Fig. E.2. Design of type B flow straightening vane.
3. Hole marking in straightening vanes is shown in Table E.1.
Table E.1. Coordinates of the holes in straightening vanes of A and B type
(D – pipeline internal diameter)
Item
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 straightening vane is installed in the pipeline at a distance of 1
÷
2
pipeline’s DN from the last source of hydraulic resistance with respect
to the flow direction. When installing the straightening vane, the length
of a straight run before PEA is determined as the distance from the
source of hydraulic resistance to PEA.
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