Class 300 Carbon Steel Pipe Flanges , Raised Face Weld Neck Flange ASTM A105
Type of Orifice Flanges:
The Orifice flange could be in many different types, welding neck orifice flanges, slip on orifice flanges or threaded orifice flanges. The sealing face of the orifice flange could be Raised Face(RF) or Ring Type Joing (RTJ)
Connection of Weld Neck Flange:
The weld neck flange is connected with the pipe from the neck in butt welding method, that means the neck should be have same material and same outer diameter and wall thickness with the pipe. The butt welding joint could provide a strong connection between the pipes and flanges which is better for high pressure application.
Sealing Face of Welding Neck Flange:
With a neck on one side of the flange, the other side of the flange is sealing face, which are between the two flanges joint. WN flange usually supplied with flat face (FF), raised face(RF) and ring type joint (RTJ). The raised face has a height on the flange rather than the flat face, the RTJ face is used to contain the gasket ring which are specially for high pressure application.
Dimensions of Weld Neck Flange:
In different standard for weld neck flange, the dimensions of the flange and sealing face have a different technical data, it is necessary to confirm all the details to make sure the flange can match the joint with the pipe and another flange. Except the standard and specification information, the neck data is also important, it means the thickness of the neck also should be provide to confirm a weld neck flange.
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ANSI B16.5 Butt welding neck flange Class300 (PN50)
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NPS
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DN
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pipe OD
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flange OD
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hole center to hole center
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diam.of holes
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NO. of holes
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thickness
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ID of flange
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diam. Of neck
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height of flange
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|
1/2"
|
15
|
21.3
|
95
|
66.7
|
16
|
4
|
12.7
|
15.5
|
38
|
51
|
|
3/4"
|
20
|
26.9
|
115
|
82.6
|
18
|
4
|
14.3
|
21
|
48
|
56
|
|
1"
|
25
|
33.7
|
125
|
88.9
|
18
|
4
|
15.9
|
27
|
54
|
60
|
|
1 1/4"
|
32
|
42.4
|
135
|
98.4
|
18
|
4
|
17.5
|
35
|
64
|
64
|
|
1 1/2"
|
40
|
48.3
|
155
|
114.3
|
22
|
4
|
19.1
|
41
|
70
|
67
|
|
2"
|
50
|
60.3
|
165
|
127
|
18
|
8
|
20.7
|
52
|
84
|
68
|
|
2 1/2"
|
65
|
76.1
|
190
|
149.2
|
22
|
8
|
23.9
|
66
|
100
|
75
|
|
3"
|
80
|
88.9
|
210
|
168.3
|
22
|
8
|
27
|
77.5
|
117
|
78
|
|
4"
|
100
|
114.3
|
255
|
200
|
22
|
8
|
30.2
|
101.5
|
146
|
84
|
|
5"
|
125
|
139.7
|
280
|
235
|
22
|
8
|
33.4
|
127
|
178
|
97
|
|
6"
|
150
|
168.3
|
320
|
269.9
|
22
|
12
|
35
|
154
|
206
|
97
|
|
8"
|
200
|
219.1
|
380
|
330.2
|
26
|
12
|
39.7
|
203
|
260
|
110
|
|
10"
|
250
|
273
|
445
|
387.4
|
30
|
16
|
46.1
|
255
|
321
|
116
|
|
12"
|
300
|
323.9
|
520
|
450.8
|
33
|
16
|
49.3
|
303.5
|
375
|
129
|
|
14"
|
350
|
355.6
|
585
|
514.4
|
33
|
20
|
52.4
|
as per customers require
|
425
|
141
|
|
16"
|
400
|
406.4
|
650
|
571.5
|
36
|
20
|
55.6
|
483
|
144
|
|
18"
|
450
|
457
|
710
|
628.6
|
36
|
24
|
58.8
|
533
|
157
|
|
20"
|
500
|
508
|
775
|
685.8
|
36
|
24
|
62
|
587
|
160
|
|
24"
|
600
|
610
|
915
|
812.8
|
42
|
24
|
68.3
|
702
|
167
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Advantage description:
PROVIDING ASME / EN / JIS / GB CODE & NON CODE INDUSTRIAL FLANGES FOR:
The Petrochemical, Process, and Waterworks industries. ANSI, API, AWWA pipe flanges in carbon steel , stainless steel , alloys and chrome steel. Weld Neck, Slip on, Blind, Threaded, Socket Weld, Lap Joint, Orifice Flanges, Ring, and custom flanges in sizes 1/2" to 203". Pressure classes - 75, 125, 150, 175, 250, 300, 350, 400, 600, 900, 1500, 2500, 5K, 10K, 15K, 20K. High Yield - Low Temp.
