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Stainless welding neck flanges 300 lbs

Tube, pipe, fittings and flanges

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ASTM A182, ASME B16.5
Sch 10S / 40S / 80S / Std

Raised face, smooth finish (125-250 RMS / 3.2-6.3 µm)

● = Sch 40S/Std
▲ = Sch 80S
■ = Sch 10S
x = Sch 10S / 40S / 80S

Product code examples:

●: FFWN-F51-2-300-40S
▲: FFWN-316L-4-300-80S

1 O.D. = Outside Diameter

Flange Hub Raised face Drilling template Weight Stock standard
Nom.
size		 O.D.1 D J b h a m g l k No. of
holes		 kg/pce ASTM
304L		 ASTM
316L		 F51
UNS
S31803
mm mm mm mm mm mm mm mm mm mm
1/2"
3/4"
1"
1 ¼"
21.3
26.7
33.4
42.2
95.2
117.3
123.9
133.3
15.7
20.8
26.7
35.1
14.2
15.7
17.5
19
52.3
57.1
62
65
21.3
26.7
33.5
42.2
38.1
47.7
53.8
63.5
35
42.9
50.8
63.5
15.7
19
19
19
66.5
82.5
88.9
98.5
4
4
4
4
0.750
1.260
1.520
2.030
x
x
x
●
x
x
x
●
●
●
●
●
1 ½"
2"
2 ½"
3"
48.3
60.3
73
88.9
155.4
165.1
190.5
209.5
40.9
52.6
62.7
78
20.6
22.3
25.4
28.4
68.3
69.8
76.2
79.2
48.3
60.4
73.1
88.9
69.5
84
100
117.3
73.1
91.9
104.6
127
22.3
19
22.3
22.3
114.3
127
149.3
168.1
4
8
8
8
2.890
3.400
5.170
6.930
x
x
●/▲
x
x
x
●/▲
x
●
●
●
●
4"
5"
6"
8"
114.3
141.3
168.3
219.1
254
279.4
317.5
381
102.4
128.3
154.2
202.7
31.7
35.1
36.5
41.1
85.8
98.6
98.5
111.2
114.3
141.3
168.4
219.2
146
177.8
206.2
260.3
157.2
185.7
215.9
269.7
22.3
22.4
22.3
25.4
200.1
235
269.7
330.2
8
8
12
12
11.200
15.100
19.100
29.900
x
●
x
●/▲
x
●/■
x
x
●
-
-
-
12"
14"
273
323.8
444.5
520.7
254.5
304.8
47.6
50.8
117.5
130.2
273.1
323.9
320.7
374.6
323.8
381
28.6
31,.7
387.3
450.8
16
16
44.300
64.000
●
●
●
●
 -
-

1 O.D. = Outside Diameter

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