Testing( Hydrostatic & Pneumatic )-Blind plate & Blank Thickness calculation Chart and Formula
TEST PRESS. (Kg/cm2)
|
PIPE SIZE
|
||||||||||||||
1.1/2
|
2
|
2.1/2
|
3
|
4
|
5
|
6
|
8
|
10
|
12
|
14
|
16
|
18
|
20
|
24
|
|
7
|
1.6
|
2.0
|
2.3
|
3.0
|
4.0
|
4.5
|
5.5
|
7.0
|
9.0
|
10.5
|
11.5
|
13.0
|
14.5
|
16.5
|
19.5
|
14
|
2.3
|
2.7
|
3.5
|
4.0
|
5.5
|
6.5
|
7.5
|
10.0
|
12.5
|
15.5
|
16.0
|
18.5
|
21.0
|
23.0
|
28.0
|
21
|
2.7
|
3.4
|
4.0
|
5.0
|
6.5
|
8.0
|
9.5
|
12.0
|
15.0
|
18.5
|
20.0
|
22.5
|
25.5
|
28.5
|
34.0
|
28
|
3.2
|
4.0
|
5.5
|
6.0
|
7.5
|
9.0
|
11.0
|
14.0
|
17.5
|
21.0
|
23.0
|
26.0
|
29.5
|
32.5
|
39.0
|
35
|
3.5
|
4.5
|
6.0
|
6.5
|
8.5
|
10.0
|
12.0
|
16.0
|
19.5
|
23.5
|
25.5
|
29.0
|
33.0
|
36.5
|
43.5
|
42
|
4.0
|
4.5
|
6.0
|
7.0
|
9.0
|
11.0
|
13.5
|
17.5
|
21.5
|
25.5
|
28.0
|
32.0
|
36.0
|
40.0
|
48.0
|
49
|
4.0
|
5.0
|
7.0
|
7.5
|
10.0
|
12.0
|
14.5
|
18.5
|
23.0
|
27.5
|
30.0
|
34.5
|
39.0
|
43.0
|
51.5
|
56
|
4.5
|
5.5
|
7.0
|
8.0
|
10.5
|
13.0
|
15.5
|
20.0
|
25.0
|
29.5
|
32.5
|
37.0
|
41.5
|
46.0
|
55.5
|
63
|
5.0
|
6.0
|
7.5
|
8.5
|
11.0
|
14.0
|
16.0
|
21.0
|
26.5
|
31.0
|
34.0
|
39.0
|
44.0
|
49.0
|
58.6
|
70
|
5.0
|
6.0
|
8.0
|
9.0
|
12.0
|
14.5
|
17.0
|
22.5
|
27.5
|
33.0
|
36.0
|
41.0
|
46.5
|
51.5
|
62.0
|
77
|
5.5
|
6.5
|
8.0
|
9.5
|
12.0
|
15.0
|
18.0
|
23.5
|
29.0
|
34.5
|
38.0
|
43.0
|
48.5
|
54.0
|
65.0
|
84
|
5.5
|
7.0
|
8.5
|
10.0
|
13.0
|
16.0
|
18.5
|
24.5
|
30.5
|
36.0
|
39.5
|
45.0
|
51.0
|
56.5
|
68.0
|
91
|
5.5
|
7.0
|
9.0
|
10.5
|
13.5
|
16.5
|
19.5
|
25.5
|
31.5
|
39.5
|
41.0
|
47.0
|
53.0
|
58.5
|
70.5
|
98
|
6.0
|
7.5
|
9.0
|
10.5
|
14.0
|
17.0
|
20.0
|
26.5
|
33.5
|
39.0
|
42.5
|
49.0
|
55.0
|
61.0
|
73.0
|
105
|
6.0
|
7.5
|
9.5
|
11.0
|
14.5
|
17.5
|
21.0
|
27.0
|
34.0
|
40.0
|
44.0
|
50.5
|
57.0
|
63.0
|
75.5
|
112
|
6.5
|
8.0
|
10.0
|
11.5
|
14.5
|
18.0
|
21.5
|
28.0
|
34.0
|
41.5
|
45.5
|
52.0
|
58.5
|
65.0
|
78.0
|
119
|
6.5
|
8.0
|
10.0
|
12.0
|
15.0
|
18.5
|
22.0
|
29.0
|
36.0
|
43.0
|
47.0
|
54.0
|
60.5
|
69.0
|
80.5
|
126
|
6.5
|
8.5
|
10.5
|
12.0
|
15.5
|
20.0
|
23.0
|
30.0
|
37.0
|
44.0
|
48.5
|
55.5
|
62.0
|
69.0
|
83.0
|
133
|
7.0
|
8.5
|
10.5
|
12.5
|
16.0
|
20.0
|
23.5
|
30.5
|
38.0
|
45.5
|
49.5
|
57.0
|
64.0
|
71.0
|
85.0
|
140
|
7.0
|
9.0
|
10.5
|
13.0
|
16.5
|
20.5
|
24.0
|
31.5
|
39.0
|
46.5
|
51.0
|
58.5
|
65.5
|
73.0
|
87.5
|
175
|
8.0
|
10.0
|
12.0
|
14.5
|
18.5
|
23.0
|
27.0
|
35.0
|
44.0
|
52.0
|
57.0
|
65.0
|
73.5
|
81.5
|
97.5
|
210
|
8.5
|
11.0
|
13.0
|
15.5
|
20.0
|
25.0
|
30.0
|
38.5
|
48.0
|
57.0
|
62.5
|
71.0
|
80.5
|
89.0
|
107
|
2. The piping
diameter is 1” and below, the following table shall be followed for the
thickness of blind plate.
Test Pressure (kg /
cm2)
|
Thickness of Blind
Plate (mm)
|
7 and below
|
1.6
|
8 ~ 14
|
2.3
|
15 ~ 40
|
2.5
|
41 ~ 60
|
3.2
|
61 ~ 115
|
4.5
|
116 ~ 210
|
6.0
|
3.The piping diameter is greater than or equal to 26”, following
formula shall be applied to determine the thickness of blank.
Thickness of blank (t) mm =
Thickness of blank (t) mm =
(Ref. ASME B31.3
dg : inside diameter of
gasket (mm)
P : Test pressure (Kg/cm2)
S : Allowable Stress
(Kg/cm2)
E : Quality Factor
I haven’t known about it before. This article is very helpful!
ReplyDeleteThank you so much!
Hydro testing services in UAE
If the vessel is to be hydo-test, what will be the blind plate thickness.
ReplyDeleteYour work is really very useful.
ReplyDeleteIt would be really helpful if for table no.1(blind plate thickness for piping above1-1/2") you could please share the formula used for calculation and the reference for the formula/table.
can i use 30mm +20mm combined blind instead of 50 mm blind?
ReplyDelete