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Weld Neck Flange


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Details of the introduction

A weld neck flange (also known as a high-hub flange and tapered hub flange

) is a type of flange. Weld Neck Flange is easy to recognize at the long tapered hub, that goes gradually over to the wall thickness from a pipe or fitting.

There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant. A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.

Such flanges are suitable for use in hostile environments that have extremes of temperature, pressure or other sources of stress. The resilience of this type of flange is achieved by sharing the environmental stress with the pipe with which it is welded. This type of flange has been used successfully at pressures up to 5,000 psi.

These flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction of product flow. This prevents turbulence at the joint and reduces erosion. They also provide excellent stress distribution through the tapered hub and are easily radio-graphed for flaw detection.

Weld neck flange will be welded to a pipe or fitting with a single full penetration, V weld (Butt-weld).

Flange Type

Welding Neck flange, Slip-On; Socket Welding, Blind, Thread, Lap-joint; Long Welding Neck; Orifice; All flanges in Raised Face, Flat face and RTJ;

Material

ASTM A105; A350 LF2; A694 F42, F46, F52, F56,
A182 F12/F22/F5/F9/ F91;
A182 F304/F304L/F316/F316L, etc.

Size

1/2”~60”, as the clients’ requests;

Pressure

Class: 150 300 400 600 900 1500 2500; PN6,PN10,PN16,PN25,PN40;5K,10K,16K,20K,30K

Standard

ASME B16.5, ASME B16.47, MSS SP43, EN1092DIN, JIS;



Class 150 lb
Pipe Flange Data Hub Data Raised Face Drilling Data Unit Weight
Nominal
Pipe Size
A B C D E F G H I J
Outside
Diameter
Overall
Diameter
Inside
Diameter
Flange
Thickness
min
Overall
Length
Diameter
at Weld
Bevel
Hub
Diameter
Face
Diameter
Number
of Holes
Bolt Hole
Diameter
Diameter
of Circle
of Holes
kg/
piece
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
1/2 0.840
21.30
3.500
88.90
0.620
15.70
0.440
11.20
1.880
47.80
0.840
21.30
1.190
30.20
1.380
35.00
4 0.620 15.70 2.380 60.45 0.48
3/4 1.050
26.70
3.880
98.60
0.820
20.80
0.500
12.70
2.060
52.30
1.050
26.70
1.500
38.10
1.690
42.90
4 0.620 15.70 2.750 69.85 0.71
1 1.315
33.40
4.250
108.0
1.050
26.70
0.560
14.20
2.190
55.60
1.320
33.50
1.940
49.30
2.000
50.80
4 0.620 15.70 3.120 79.25 1.01
1 1/4 1.660
42.20
4.620
117.3
1.380
35.10
0.620
15.70
2.250
57.15
1.660
42.20
2.310
58.70
2.500
63.50
4 0.620 15.70 3.500 88.90 1.33
1 1/2 1.900
48.30
5.000
127.0
1.610
40.90
0.690
17.50
2.440
62.00
1.900
48.30
2.560
65.00
2.880
73.15
4 0.620 15.70 3.880 98.60 1.72
2 2.375
60.30
6.000
152.4
2.070
52.60
0.750
19.10
2.500
63.50
2.380
60.45
3.060
77.70
3.620
91.90
4 0.750 19.10 4.750 120.7 2.58
2 1/2 2.875
73.00
7.000
177.8
2.470
62.70
0.880
22.40
2.750
69.85
2.880
73.15
3.560
90.40
4.120
104.6
4 0.750 19.10 5.500 139.7 4.11
3 3.500
88.90
7.500
190.5
3.070
78.00
0.940
23.90
2.750
69.85
3.500
88.90
4.250
108.0
5.000
127.0
4 0.750 19.10 6.000 152.4 4.92
31/2 4.000
101.6
8.500
215.9
3.550
90.20
0.940
23.90
2.810
71.40
4.000
101.6
4.810
122.2
5.500
139.7
8 0.750 19.10 7.000 177.8 6.08
4 4.500
114.3
9.000
228.6
4.030
102.4
0.940
23.90
3.000
76.20
4.500
114.3
5.310
134.9
6.190
157.2
8 0.750 19.10 7.500 190.5 6.84
5 5.563
141.3
10.00
254.0
5.050
128.3
0.940
23.90
3.500
88.90
5.560
141.2
6.440
163.6
7.310
185.7
8 0.880 22.40 8.500 215.9 8.56
6 6.625
168.3
11.00
279.4
6.070
154.2
1.000
25.40
3.500
88.90
6.630
168.4
7.560
192.0
8.500
215.9
8 0.880 22.40 9.500 241.3 10.6
8 8.625
219.1
13.50
342.9
7.980
202.7
1.120
28.40
4.000
101.6
8.630
219.2
9.690
246.1
10.62
269.7
8 0.880 22.40 298.5 11.75 17.6
10 10.75
273.0
16.00
406.4
10.02
254.5
1.190
30.20
4.000
101.6
10.75
273.0
12.00
304.8
12.75
323.8
12 1.000 25.40 14.25 362.0 24
12 12.75
323.8
19.00
482.6
12.00
304.8
1.250
31.75
4.500
114.3
12.75
323.8
14.38
365.3
15.00
381.0
12 1.000 25.40 17.00 431.8 36.5
14 14.00
355.6
21.00
533.4
To be specified by
Purchaser
1.380
35.10
5.000
127.0
14.00
355.6
15.75
400.1
16.25
412.7
12 1.120 28.40 18.75 476.3 48.4
16 16.00
406.4
23.50
596.9
1.440
36.60
5.000
127.0
16.00
406.4
18.00
475.2
18.50
469.9
16 1.120 28.40 21.25 539.8 60.6
18 18.00
457.2
25.00
635.0
1.560
39.60
5.500
139.7
18.00
457.2
19.88
505.0
21.00
533.4
16 1.250 31.75 22.75 577.9 68.3
20 20.00
508.0
27.50
698.5
1.690
42.90
5.690
144.5
20.00
508.0
22.00
558.8
23.00
584.2
20 1.250 31.75 25.00 635.0 84.5
24 24.00
609.6
32.00
812.8
1.880
47.80
6.000
152.4
24.00
609.6
26.12
663.4
27.25
692.1
20 1.380 35.10 29.50 749.3 115

Class 300 lb
Pipe Flange Data Hub Data Raised Face Drilling Data Unit Weight
Nominal
Pipe Size
A B C D E F G H I J
Outside
Diameter
Overall
Diameter
Inside
Diameter
Flange
Thickness
min
Overall
Length
Diameter
at Weld
Bevel
Hub
Diameter
Face
Diameter
Number
of Holes
Bolt Hole
Diameter
Diameter
of Circle
of Holes
kg/
piece
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
1/2 0.840
21.30
3.750
95.20
0.620
15.70
0.560
14.20
2.060
52.30
0.840
21.30
1.500
38.10
1.380
35.00
4 0.620
15.70
2.620 66.55 0.75
3/4 1.050
26.70
4.620
117.3
0.820
20.80
0.620
15.70
2.250
57.15
1.050
26.70
1.880
47.70
1.690
42.90
4 0.750 19.00 3.250 82.50 1.26
1 1.315
33.40
4.880
123.9
1.050
26.70
0.690
17.50
2.440
62.00
1.320
33.50
2.120
53.80
2.000
50.80
4 0.750 19.00 3.500 88.90 1.52
1 1/4 1.660
42.20
5.250
133.3
1.380
35.10
0.750
19.00
2.560
65.00
1.660
42.20
2.500
63.50
2.500
63.50
4 0.750 19.00 3.880 98.50 2.03
1 1/2 1.900
48.30
6.120
155.4
1.610
40.90
0.810
20.60
2.690
68.30
1.900
48.30
2.750
69.85
2.880
73.15
4 0.880 22.30 4.500 114.3 2.89
2 2.375
60.30
6.500
165.1
2.070
52.60
0.880
22.30
2.750
69.85
2.380
60.45
3.310
84.00
3.620
91.90
8 0.750 19.00 5.000 127.0 3.4
2 1/2 2.875
73.00
7.500
190.5
2.470
62.70
1.000
25.40
3.000
76.20
2.880
73.15
3.940
100.0
4.120
104.6
8 0.880 22.30 5.880 149.3 5.17
3 3.500
88.90
8.250
209.5
3.070
78.00
1.120
28.40
3.120
79.25
3.500
88.90
4.620
117.3
5.000
127.0
8 0.880 22.30 6.620 168.1 6.93
31/2 4.000
101.6
9.000
228.6
3.550
90.20
1.190
30.20
3.190
81.00
4.000
101.6
5.250
133.3
5.500
139.7
8 0.880 22.30 7.250 184.1 8.67
4 4.500
114.3
10.00
254.0
4.030
102.4
1.250
31.70
3.380
85.80
4.500
114.3
5.750
146.0
6.190
157.2
8 0.880 22.30 7.880 200.1 11.2
5 5.563
141.3
11.00
279.4
5.050
128.3
1.380
35.00
3.880
98.50
5.560
141.2
7.000
177.8
7.310
185.7
8 0.880 22.30 9.250 234.9 15.1
6 6.625
168.3
12.50
317.5
6.070
154.2
1.440
36.50
3.880
98.50
6.630
168.4
8.120
206.2
8.500
215.9
12 0.880 22.30 10.62 269.7 19.1
8 8.625
219.1
15.00
381.0
7.980
202.7
1.620
41.10
4.380
111.2
8.630
219.2
10.25
260.3
10.62
269.7
12 1.000 25.40 13.00 330.2 29.9
10 10.75
273.0
17.50
444.5
10.02
254.5
1.880
47.70
4.620
117.3
10.75
273.0
12.62
320.5
12.75
323.8
16 1.120 28.40 15.25 387.3 42.7
12 12.75
323.8
20.50
520.7
12.00
304.8
2.000
50.80
5.120
130.0
12.75
323.8
14.75
374.6
15.00
381.0
16 1.250 31.70 17.75 450.8 61.8
14 14.00
355.6
23.00
584.2
To be specified by
Purchaser
2.120
53.80
5.620
142.7
14.00
355.6
16.75
425.4
16.25
412.7
20 1.250 31.70 20.25 514.3 85.8
16 16.00
406.4
25.50
647.7
2.250
57.15
5.750
146.0
16.00
406.4
19.00
482.6
18.50
469.9
20 1.380 35.00 22.50 571.5 106
18 18.00
457.2
28.00
711.2
2.380
60.45
6.250
158.7
18.00
457.2
21.00
533.4
21.00
533.4
24 1.380 35.00 24.75 628.6 131
20 20.00
508.0
30.50
774.7
2.500
63.50
6.380
162.0
20.00
508.0
23.12
587.2
23.00
584.2
24 1.380 35.00 27.00 685.8 158
24 24.00
609.6
36.00
914.4
2.750
69.85
6.620
168.1
24.00
609.6
27.62
701.5
27.25
692.1
24 1.620 41.10 32.00 812.8 230

Notes
- Dimension B corresponds to the pipe inside diameter. Values quoted assume 40S/Standard wall thickness.
- Weights are based on manufacturer’s data and are approximate.
- Flat face flanges may be provided at full thickness, C, or with raised face removed (the latter is nonstandard)


Class 400 lb
Pipe Flange Data Hub Data Raised Face Drilling Data Unit Weight
Nominal
Pipe Size
A B C D E F G H I J
Outside
Diameter
Overall
Diameter
Inside
Diameter
Flange
Thickness
min
Overall
Length
Diameter
at Weld
Bevel
Hub
Diameter
Face
Diameter
Number
of Holes
Bolt Hole
Diameter
Diameter
of Circle
of Holes
kg/
piece
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
1/2 0.840
21.30
3.750
95.30
To be specified by
Purchaser
0.560
14.20
2.060
52.30
0.840
21.30
1.500
38.10
1.380
35.00
4 0.620 15.70 2.620 66.55 0.87
3/4 1.050
26.70
4.620
117.3
0.620
15.70
2.250
57.15
1.050
26.70
1.880
47.80
1.690
42.90
4 0.750 19.10 3.250 82.60 1.45
1 1.315
33.40
4.880
124.0
0.690
17.50
2.440
62.00
1.320
33.50
2.120
53.80
2.000
50.80
4 0.750 19.10 3.500 88.90 1.76
1 1/4 1.660
42.20
5.250
133.4
0.810
20.60
2.620
66.55
1.660
42.20
2.500
63.50
2.500
63.50
4 0.750 19.10 3.880 98.60 2.49
1 1/2 1.900
48.30
6.120
155.4
0.880
22.40
2.750
69.85
1.900
48.30
2.750
69.85
2.880
73.15
4 0.880 22.40 4.500 114.3 3.49
2 2.375
60.30
6.500
165.1
1.000
25.40
2.880
73.15
2.380
60.45
3.310
84.10
3.620
91.90
8 0.750 19.10 5.000 127.0 4.36
2 1/2 2.875
73.00
7.500
190.5
1.120
28.40
3.120
79.25
2.880
73.15
3.940
100.1
4.120
104.6
8 0.880 22.40 5.880 149.4 6.43
3 3.500
88.90
8.250
209.6
1.250
31.75
3.250
82.60
3.500
88.90
4.620
117.3
5.000
127.0
8 0.880 22.40 6.620 168.1 8.53
31/2 4.000
101.6
9.000
228.6
1.380
35.10
3.380
85.90
4.000
101.6
5.250
133.4
5.500
139.7
8 1.000 25.40 7.250 184.2 10.7
4 4.500
114.3
10.00
254.0
1.380
35.10
3.500
88.90
4.500
114.3
5.750
146.1
6.190
157.2
8 1.000 25.40 7.880 200.2 12.8
5 5.563
141.3
11.00
279.4
1.500
38.10
4.000
101.6
5.560
141.2
7.000
177.8
7.310
185.7
8 1.000 25.40 9.250 235.0 16.9
6 6.625
168.3
12.50
317.5
1.620
41.10
4.060
103.1
6.630
168.4
8.120
206.2
8.500
215.9
12 1.000 25.40 10.62 269.7 22
8 8.625
219.1
15.00
381.0
1.880
47.80
4.620
117.3
8.630
219.2
10.25
260.4
10.62
269.7
12 1.120 28.40 13.00 330.2 34.7
10 10.75
273.0
17.50
444.5
2.120
53.80
4.880
124.0
10.75
273.0
12.62
320.5
12.75
323.8
16 1.250 31.75 15.25 387.4 48.5
12 12.75
323.8
20.50
520.7
2.250
57.15
5.380
136.7
12.75
323.8
14.75
374.7
15.00
381.0
16 1.380 35.10 17.75 450.9 69.6
14 14.00
355.6
23.00
584.2
2.380
60.45
5.880
149.4
14.00
355.6
16.75
425.5
16.25
412.7
20 1.380 35.10 20.25 514.4 95.5
16 16.00
406.4
25.50
647.7
2.500
63.50
6.000
152.4
16.00
406.4
19.00
482.6
18.50
469.9
20 1.500 38.10 22.50 571.5 118
18 18.00
457.2
28.00
711.2
2.620
66.55
6.500
165.1
18.00
457.2
21.00
533.4
21.00
533.4
24 1.500 38.10 24.75 628.7 145
20 20.00
508.0
30.50
774.7
2.750
69.85
6.620
168.1
20.00
508.0
23.12
587.2
23.00
584.2
24 1.620 41.10 27.00 685.8 173
24 24.00
609.6
36.00
914.4
3.000
76.20
6.880
174.8
24.00
609.6
27.62
701.5
27.25
692.1
24 1.880 47.80 32.00 812.8 249

Class 600 lb
Pipe Flange Data Hub Data Raised Face Drilling Data Unit Weight
Nominal
Pipe Size
A B C D E F G H I J
Outside
Diameter
Overall
Diameter
Inside
Diameter
Flange
Thickness
min
Overall
Length
Diameter
at Weld
Bevel
Hub
Diameter
Face
Diameter
Number
of Holes
Bolt Hole
Diameter
Diameter
of Circle
of Holes
kg/
piece
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
1/2 0.840
21.30
3.750
95.30
To be specified by
Purchaser
0.560
14.20
2.060
52.30
0.840
21.30
1.500
38.10
1.380
35.00
4 0.620 15.70 2.620 66.55 0.87
3/4 1.050
26.70
4.620
117.3
0.620
15.70
2.250
57.15
1.050
26.70
1.880
47.80
1.690
42.90
4 0.750 19.10 3.250 82.60 1.45
1 1.315
33.40
4.880
124.0
0.690
17.50
2.440
62.00
1.320
33.50
2.120
53.80
2.000
50.80
4 0.750 19.10 3.500 88.90 1.76
1 1/4 1.660
42.20
5.250
133.4
0.810
20.60
2.620
66.55
1.660
42.20
2.500
63.50
2.500
63.50
4 0.750 19.10 3.880 98.60 2.49
1 1/2 1.900
48.30
6.120
155.4
0.880
22.40
2.750
69.85
1.900
48.30
2.750
69.85
2.880
73.15
4 0.880 22.40 4.500 114.3 3.49
2 2.375
60.30
6.500
165.1
1.000
25.40
2.880
73.15
2.380
60.45
3.310
84.10
3.620
91.90
8 0.750 19.10 5.000 127.0 4.36
2 1/2 2.875
73.00
7.500
190.5
1.120
28.40
3.120
79.25
2.880
73.15
3.940
100.1
4.120
104.6
8 0.880 22.40 5.880 149.4 6.43
3 3.500
88.90
8.250
209.6
1.250
31.75
3.250
82.60
3.500
88.90
4.620
117.3
5.000
127.0
8 0.880 22.40 6.620 168.1 8.53
31/2 4.000
101.6
9.000
228.6
1.380
35.10
3.380
85.90
4.000
101.6
5.250
133.4
5.500
139.7
8 1.000 25.40 7.250 184.2 10.7
4 4.500
114.3
10.75
273.1
1.500
38.10
4.000
101.6
4.500
114.3
6.000
152.4
6.190
157.2
8 1.000 25.40 8.500 215.9 17.4
5 5.563
141.3
13.00
330.2
1.750
44.50
4.500
114.3
5.560
141.2
7.440
189.0
7.310
185.7
8 1.120 28.40 10.50 266.7 29.2
6 6.625
168.3
14.00
355.6
1.880
47.80
4.620
117.3
6.630
168.4
8.750
222.3
8.500
215.9
12 1.120 28.40 292.1 11.50 34.9
8 8.625
219.1
16.50
419.1
2.190
55.60
5.250
133.4
8.630
219.2
10.75
273.1
10.62
269.7
12 1.250 31.75 13.75 349.3 53.9
10 10.75
273.0
20.00
508.0
2.500
63.50
6.000
152.4
10.75
273.0
13.50
342.9
12.75
323.8
16 1.380 35.10 17.00 431.8 86.5
12 12.75
323.8
22.00
558.8
2.620
66.55
6.120
155.4
12.75
323.8
15.75
400.1
15.00
381.0
20 1.380 35.10 19.25 489.0 103
14 14.00
355.6
23.75
603.3
2.750
69.85
6.500
165.1
14.00
355.6
17.00
431.8
16.25
412.7
20 1.500 38.10 20.75 527.1 122
16 16.00
406.4
27.00
685.8
3.000
76.20
7.000
177.8
16.00
406.4
19.50
495.3
18.50
469.9
20 1.620 41.10 23.75 603.3 170
18 18.00
457.2
29.25
743.0
3.250
82.60
7.250
184.2
18.00
457.2
21.50
546.1
21.00
533.4
20 1.750 44.50 25.75 654.1 204
20 20.00
508.0
32.00
812.8
3.500
88.90
7.500
190.5
20.00
508.0
24.00
609.6
23.00
584.2
24 1.750 44.50 28.50 723.9 254
24 24.00
609.6
37.00
939.8
4.000
101.6
8.000
203.2
24.00
609.6
28.25
717.6
27.25
692.1
24 2.000 50.80 33.00 838.2 358

Class 900 lb
Pipe Flange Data Hub Data Raised Face Drilling Data Unit Weight
Nominal
Pipe Size
A B C D E F G H I J
Outside
Diameter
Overall
Diameter
Inside
Diameter
Flange
Thickness
min
Overall
Length
Diameter
at Weld
Bevel
Hub
Diameter
Face
Diameter
Number
of Holes
Bolt Hole
Diameter
Diameter
of Circle
of Holes
kg/
piece
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
1/2 0.840
21.30
4.750
120.6
To be specified by
Purchaser
0.880
22.30
2.380
60.45
0.840
21.30
1.500
38.10
1.380
35.00
4 0.880 22.30 3.250 82.50 1.87
3/4 1.050
26.70
5.120
130.0
1.000
25.40
2.750
69.85
1.050
26.70
1.750
44.00
1.690
42.90
4 0.880 22.30 3.500 88.90 2.56
1 1.315
33.40
5.880
149.3
1.120
28.40
2.880
73.15
1.320
33.50
2.060
52.30
2.000
50.80
4 1.000 25.40 4.000 101.6 3.74
1 1/4 1.660
42.20
6.250
158.7
1.120
28.40
2.880
73.15
1.660
42.20
2.500
63.50
2.500
63.50
4 1.000 25.40 4.380 111.2 4.33
1 1/2 1.900
48.30
7.000
177.8
1.250
31.70
3.250
82.50
1.900
48.30
2.750
69.85
2.880
73.15
4 1.120 28.40 4.880 123.9 5.94
2 2.375
60.30
8.500
215.9
1.500
38.10
4.000
101.6
2.380
60.45
4.120
104.6
3.620
91.90
8 1.000 25.40 6.500 165.1 10.8
2 1/2 2.875
73.00
9.620
244.3
1.620
41.10
4.120
104.6
2.880
73.15
4.880
123.9
4.120
104.6
8 1.120 28.40 7.500 190.5 15
3 3.500
88.90
9.500
241.3
1.500
38.10
4.000
101.6
3.500
88.90
5.000
127.0
5.000
127.0
8 1.000 25.40 7.500 190.5 13.7
4 4.500
114.3
11.50
292.1
1.750
44.40
4.500
114.3
4.500
114.3
6.250
158.7
6.190
157.2
8 1.250 31.70 9.250 234.9 22.5
5 5.563
141.3
13.75
349.2
2.000
50.80
5.000
127.0
5.560
141.2
7.500
190.5
7.310
185.7
8 1.380 35.00 279.4 11.00 37.4
6 6.625
168.3
15.00
381.0
2.190
55.60
5.500
139.7
6.630
168.4
9.250
234.9
8.500
215.9
12 1.250 31.70 12.50 317.5 47.7
8 8.625
219.1
18.50
469.9
2.500
63.50
6.380
162.0
8.630
219.2
11.75
298.4
10.62
269.7
12 1.500 38.10 15.50 393.7 81.3
10 10.75
273.0
21.50
546.1
2.750
69.85
7.250
184.1
10.75
273.0
14.50
368.3
12.75
323.8
16 1.500 38.10 18.50 469.9 119
12 12.75
323.8
24.00
609.6
3.120
79.25
7.880
200.1
12.75
323.8
16.50
419.1
15.00
381.0
20 1.500 38.10 21.00 533.4 157
14 14.00
355.6
25.25
641.3
3.380
85.80
8.380
212.8
14.00
355.6
17.75
450.8
16.25
412.7
20 1.620 41.10 22.00 558.8 180
16 16.00
406.4
27.75
704.8
3.500
88.90
8.500
215.9
16.00
406.4
20.00
508.0
18.50
469.9
20 1.750 44.40 24.25 615.9 217
18 18.00
457.2
31.00
787.4
4.000
101.6
9.000
228.6
18.00
457.2
22.25
565.1
21.00
533.4
20 2.000 50.80 27.00 685.8 292
20 20.00
508.0
33.75
857.2
4.250
107.9
9.750
247.6
20.00
508.0
24.50
622.3
23.00
584.2
20 2.120 53.80 29.50 749.3 362
24 24.00
609.6
41.00
1041.4
5.500
139.7
11.50
292.1
24.00
609.6
29.50
749.3
27.25
692.1
20 2.620 66.55 35.50 901.7 665

Class 1500 lb
Pipe Flange Data Hub Data Raised Face Drilling Data Unit Weight
Nominal
Pipe Size
A B C D E F G H I J
Outside
Diameter
Overall
Diameter
Inside
Diameter
Flange
Thickness
min
Overall
Length
Diameter
at Weld
Bevel
Hub
Diameter
Face
Diameter
Number
of Holes
Bolt Hole
Diameter
Diameter
of Circle
of Holes
kg/
piece
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
1/2 0.840
21.30
4.750
120.6
To be specified by
Purchaser
0.880
22.30
2.380
60.45
0.840
21.30
1.500
38.10
1.380
35.00
4 0.880 22.30 3.250 82.50 1.87
3/4 1.050
26.70
5.120
130.0
1.000
25.40
2.750
69.85
1.050
26.70
1.750
44.00
1.690
42.90
4 0.880 22.30 3.500 88.90 2.56
1 1.315
33.40
5.880
149.3
1.120
28.40
2.880
73.15
1.320
33.50
2.060
52.30
2.000
50.80
4 1.000 25.40 4.000 101.6 3.74
1 1/4 1.660
42.20
6.250
158.7
1.120
28.40
2.880
73.15
1.660
42.20
2.500
63.50
2.500
63.50
4 1.000 25.40 4.380 111.2 4.33
1 1/2 1.900
48.30
7.000
177.8
1.250
31.70
3.250
82.50
1.900
48.30
2.750
69.85
2.880
73.15
4 1.120 28.40 4.880 123.9 5.94
2 2.375
60.30
8.500
215.9
1.500
38.10
4.000
101.6
2.380
60.45
4.120
104.6
3.620
91.90
8 1.000 25.40 6.500 165.1 10.8
2 1/2 2.875
73.00
9.620
244.3
1.620
41.10
4.120
104.6
2.880
73.15
4.880
123.9
4.120
104.6
8 1.120 28.40 7.500 190.5 15
3 3.500
88.90
10.50
266.7
1.880
47.70
4.620
177.3
3.500
88.90
5.250
133.3
5.000
127.0
8 1.250 31.70 8.000 203.2 19.9
4 4.500
114.3
12.25
311.1
2.120
53.80
4.880
123.9
4.500
114.3
6.380
162.0
6.190
157.2
8 1.380 35.00 9.500 241.3 29.9
5 5.563
141.3
14.75
374.6
2.880
73.15
6.120
155.4
5.560
141.2
7.750
196.8
7.310
185.7
8 1.620 41.10 292.1 11.50 55.4
6 6.625
168.3
15.50
393.7
3.250
82.50
6.750
171.4
6.630
168.4
9.000
228.6
8.500
215.9
12 1.500 38.10 12.50 317.5 68.4
8 8.625
219.1
19.00
482.6
3.620
91.90
8.380
212.8
8.630
219.2
11.50
292.1
10.62
269.7
12 1.750 44.40 15.50 393.7 117
10 10.75
273.0
23.00
584.2
4.250
107.9
10.00
254.0
10.75
273.0
14.50
368.3
12.75
323.8
12 2.000 50.80 19.00 482.6 194
12 12.75
323.8
26.50
673.1
4.880
123.9
11.12
282.4
12.75
323.8
17.75
450.8
15.00
381.0
16 2.120 53.80 22.50 571.5 288
14 14.00
355.6
29.50
749.3
5.250
133.3
11.75
298.4
14.00
355.6
19.50
495.3
16.25
412.7
16 2.380 60.45 25.00 635.0 380
16 16.00
406.4
32.50
825.5
5.750
146.0
12.25
311.1
16.00
406.4
21.75
552.4
18.50
469.9
16 2.620 66.55 27.75 704.8 485
18 18.00
457.2
36.00
914.4
6.380
162.0
12.88
327.1
18.00
457.2
23.50
596.9
21.00
533.4
16 2.880 73.15 30.50 774.7 644
20 20.00
508.0
38.75
984.2
7.000
177.8
14.00
355.6
20.00
508.0
25.25
641.3
23.00
584.2
16 3.120 79.25 32.75 831.8 775
24 24.00
609.6
46.00
1168.4
8.000
203.2
16.00
406.4
24.00
609.6
30.00
762.0
27.25
692.1
16 3.620 91.90 39.00 990.6 1232

Class 2500 lb
Pipe Flange Data Hub Data Raised Face Drilling Data Unit Weight
Nominal
Pipe Size
A B C D E F G H I J
Outside
Diameter
Overall
Diameter
Inside
Diameter
Flange
Thickness
min
Overall
Length
Diameter
at Weld
Bevel
Hub
Diameter
Face
Diameter
Number
of Holes
Bolt Hole
Diameter
Diameter
of Circle
of Holes
kg/
piece
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
1/2 0.840
21.30
5.250
133.4
To be specified by
Purchaser
1.190
30.20
2.880
73.15
0.840
21.30
1.690
42.90
1.380
35.00
4 0.880 22.40 3.500 88.90 3.12
3/4 1.050
26.70
5.500
139.7
1.250
31.75
3.120
79.25
1.050
26.70
2.000
50.80
1.690
42.90
4 0.880 22.40 3.750 95.30 3.7
1 1.315
33.40
6.250
158.8
1.380
35.10
3.500
88.90
1.320
33.50
2.250
57.15
2.000
50.80
4 1.000 25.40 4.250 108.0 5.24
1 1/4 1.660
42.20
7.250
184.2
1.500
38.10
3.750
95.30
1.660
42.20
2.880
73.15
2.500
63.50
4 1.120 28.40 5.120 130.0 7.74
1 1/2 1.900
48.30
8.000
203.2
1.750
44.50
4.380
111.3
1.900
48.30
3.120
79.25
2.880
73.15
4 1.250 31.75 5.750 146.1 10.9
2 2.375
60.30
9.250
235.0
2.000
50.80
5.000
127.0
2.380
60.45
3.750
95.30
3.620
91.90
8 1.120 28.40 6.750 171.5 16.2
2 1/2 2.875
73.00
10.50
266.7
2.250
57.15
5.620
142.7
2.880
73.15
4.500
114.3
4.120
104.6
8 1.250 31.75 7.750 196.9 23.7
3 3.500
88.90
12.00
304.8
2.620
66.55
6.620
168.1
3.500
88.90
5.250
133.4
5.000
127.0
8 1.380 35.10 9.000 228.6 36.2
4 4.500
114.3
14.00
355.6
3.000
76.20
7.500
190.5
4.500
114.3
6.500
165.1
6.190
157.2
8 1.620 41.10 10.75 273.1 55.3
5 5.563
141.3
16.50
419.1
3.620
91.90
9.000
228.6
5.560
141.2
8.000
203.2
7.310
185.7
8 1.880 47.80 12.75 323.9 92.5
6 6.625
168.3
19.00
482.6
4.250
108.0
10.75
273.1
6.630
168.4
9.250
235.0
8.500
215.9
8 2.120 53.80 14.50 368.3 143
8 8.625
219.1
21.75
552.5
5.000
127.0
12.50
317.5
8.630
219.2
12.00
304.8
10.62
269.7
12 2.120 53.80 17.25 438.2 215
10 10.75
273.0
26.50
673.1
6.500
165.1
16.50
419.1
10.75
273.0
14.75
374.7
12.75
323.8
12 2.620 66.55 21.25 539.8 406
12 12.75
323.8
30.00
762.0
7.250
184.2
18.25
463.6
12.75
323.8
17.38
441.5
15.00
381.0
12 2.880 73.15 24.38 619.3 572

Notes
- Dimension B corresponds to the pipe inside diameter. Values quoted assume 40S/Standard wall thickness.
- Weights are based on manufacturer’s data and are approximate.
Click times:41Release time:4/18/2017 【Print】【Close
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