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ASME B16.5 Class 2500 Flange

1. Technical Drawings for ASME B16.5 Class 2500 Flanges

Drawing of ASME B16.5 Class 2500 weld neck flange, raised face(RF).

Drawing of ASME B16.5 Class 2500 weld neck flange, raised face(RF).

Drawing of ASME B16.5 Class 2500 blind flange, raised face(RF).

Drawing of ASME B16.5 Class 2500 blind flange, raised face(RF).

Drawing of ASME B16.5 Class 2500 threaded flange, raised face(RF).

Drawing of ASME B16.5 Class 2500 threaded flange, raised face(RF).

Drawing of ASME B16.5 Class 2500 lap joint flange.

Drawing of ASME B16.5 Class 2500 lap joint flange.

2. Flange and Bolting Dimensions for Class 2500

The ASME B16.5 Class 2500 flanges are available in four types: weld neck, blind, threaded, and lap joint. Threaded flanges 2500# are available with sizes from 1/2″ to 2-1/2″. Others are available with sizes from 1/2″ to 12″. Tables below are applicable to Class 2500 flanges with 7 mm raised face which is additional to the minimum flange thickness.

NPSO
mm
inch
T
mm
inch
X
mm
inch
Ah
mm
inch
ro
mm
inch
Q
mm
inch
1/2135
5.25
30.2
1.19
43
1.69
21.3
0.84
3
0.12
23.6
0.93
3/4140
5.50
31.8
1.25
51
2.00
26.7
1.05
3
0.12
29.0
1.14
1160
6.25
35.0
1.38
57
2.25
33.4
1.32
3
0.12
35.8
1.41
1-1/4185
7.25
38.1
1.50
73
2.88
42.2
1.66
5
0.19
44.4
1.75
1-1/2205
8.00
44.5
1.75
79
3.12
48.3
1.90
6
0.25
50.6
1.99
2235
9.25
50.9
2.00
95
3.75
60.3
2.38
8
0.31
63.5
2.50
2-1/2265
10.50
57.2
2.25
114
4.50
73.0
2.88
8
0.31
76.2
3.00
3305
12.00
66.7
2.62
133
5.25
88.9
3.50
10
0.38
-
4355
14.00
76.2
3.00
165
6.50
114.3
4.50
11
0.44
-
5420
16.50
92.1
3.62
203
8.00
141.3
5.56
11
0.44
-
6485
19.00
108.0
4.25
235
9.25
168.3
6.63
13
0.50
-
8550
21.75
127.0
5.00
305
12.00
219.1
8.63
13
0.50
-
10675
26.50
165.1
6.50
375
14.75
273.0
10.75
13
0.50
-
12760
30.00
184.2
7.25
441
17.38
323.8
12.75
13
0.50
-
*O:outside diameter of flange; T:minimum flange thickness(T=To=T1); X:diameter at hub.
*Ah:hub diameter at the beginning of chamfer for W/N; ro: corner bore radius of lapped flange; Q:minimum counterbore of threaded flange.

NPSY1
mm
inch
Y2
mm
inch
Y3
mm
inch
Ta
mm
inch
B1
mm
inch
B3
mm
inch
1/273
2.88
40
1.56
40
1.56
29
1.12
-22.9
0.90
3/479
3.12
43
1.69
43
1.69
32
1.25
-28.2
1.11
189
3.50
48
1.88
48
1.88
35
1.38
-34.9
1.38
1-1/495
3.75
52
2.06
52
2.06
39
1.50
-43.7
1.72
1-1/2111
4.38
60
2.38
60
2.38
45
1.75
-50.0
1.97
2127
5.00
70
2.75
70
2.75
51
2.00
-
62.5
2.46
2-1/2143
5.62
79
3.12
79
3.12
58
2.25
-75.4
2.97
3168
6.62
-92
3.62
--91.4
3.60
4190
7.50
-108
4.25
--116.8
4.60
5229
9.00
-130
5.12
--144.4
5.69
6273
10.75
-152
6.00
--171.4
6.75
8318
12.50
-178
7.00
--222.2
8.75
10419
16.50
-229
9.00
--277.4
10.92
12464
18.25
-254
10.00
--328.2
12.92
*Y1:length through hub of welding neck flange; Y2:length through hub of threaded; Y3:length through hub of lapped flange.
*Ta:minimum thread length of threaded flange; B1:bore diameter of welding neck flange. B3:bore diameter of lap joint(lapped) flange.

NPSW
mm
inch
R
mm
inch
d
inch
ndo
inch
LSRF
mm
inch
LSRJ
mm
inch
LTG
mm
inch
1/288.9
3.50
34.9
1.38
7/843/4120
4.75
120
4.75
115
4.50
3/495.2
3.75
42.9
1.69
7/843/4125
5.00
125
5.00
120
4.75
1108.0
4.25
50.8
2.00
147/8140
5.50
140
5.50
135
5.25
1-1/4130.2
5.12
63.5
2.50
1 1/841150
6.00
150
6.00
145
5.75
1-1/2146.0
5.75
73.0
2.88
1 1/441 1/8170
6.75
170
6.75
165
6.50
2171.4
6.75
92.1
3.62
1 1/881180
7.00
180
7.00
170
6.75
2-1/2196.8
7.75
104.8
4.12
1 1/481 1/8195
7.75
205
8.00
190
7.50
3228.6
9.00
127.0
5.00
1 3/881 1/4220
8.75
230
9.00
215
8.50
4273.0
10.75
157.2
6.19
1 5/881 1/2255
10.00
260
10.25
250
9.75
5323.8
12.75
185.7
7.31
1 7/881 3/4300
11.75
310
12.25
290
11.50
6368.3
14.50
215.9
8.50
2 1/882345
13.50
355
14.00
335
13.25
8438.2
17.25
269.9
10.62
2 1/8122380
15.00
395
15.50
375
14.75
10539.8
21.25
323.8
12.75
2 5/8122 1/2490
19.25
510
20.00
485
19.00
12619.1
24.38
381.0
15.00
2 7/8122 3/4540
21.25
560
22.00
535
21.00
*W:diameter of bolt circle; d:diameter of bolt holes; n:number of bolts; do:diameter of bolts; R:outside diameter of RF.
*LSRF:length of stud bolt for raised face; LSRJ:length of stud bolt for ring joint; LTG:length of stud bolt for male/ female tongue and groove.

Stud bolt with nuts for ASME B16.5 Class 2500 flanges.

Stud bolt with nuts for ASME B16.5 Class 2500 flanges.

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    (Shijiazhuang Metalsin Pipeline Tech Co., Ltd)
    No. 176, Zhonghua South Street, Shijiazhuang, China.
    Tel: +86-311-89642206
    Fax:+86-311-67906676
    Web: www.metalspiping.com
    Email: sales@metalspiping.com