| BS4504
Part 1 PIPE FLANGES
We stock a full range
of BS4504 flanges, from table 6 bar to 40 bar in grades 304, 316 and 321.
Specials can be manufactured to customer’s special requirements.
As an example, we show the dimensions of 16 bar, which is the most commonly
used.
We also offer a range of BS10 Table and ANSI flanges. For more information
contact our sales desk.
| |
WELD
NECK FLANGE |
| |
SCREWED
BOSS FLANGE |
| |
SLIP
ON BOSS FLANGE |
| |
PLATE
FLANGE |
 |
PLATE
BLANK FLANGE |
BS4504:Part
1:1969 PIPE FLANGES
Dimensions of Nominal Pressure 2.5 & 6 Flanges
| N.B |
Size |
|
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|
|
|
|
|
|
|
No.
of
Holes |
|
|
D |
C1 |
C2 |
C3 |
F |
E |
B |
H1 |
H2 |
H3 |
N1 |
N2 |
A |
K |
R |
L |
| Ins |
mm |
|
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|
|
|
|
|
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|
|
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|
|
3/8 |
10 |
75 |
12 |
12 |
12 |
2 |
35 |
18.2 |
20 |
28 |
6 |
26 |
25 |
17.2 |
50 |
3 |
11 |
4 |
| ½ |
15 |
80 |
12 |
12 |
12 |
2 |
40 |
22.4 |
20 |
30 |
6 |
30 |
30 |
21.3 |
55 |
3 |
11 |
4 |
|
¾ |
20 |
90 |
14 |
14 |
14 |
2 |
50 |
27.7 |
24 |
32 |
6 |
38 |
40 |
26.9 |
65 |
4 |
11 |
4 |
| 1" |
25 |
100 |
14 |
14 |
14 |
2 |
60 |
34.5 |
24 |
35 |
6 |
42 |
50 |
33.7 |
75 |
4 |
11 |
4 |
|
1
¼ |
32 |
120 |
16 |
14 |
14 |
2 |
70 |
43.2 |
26 |
35 |
6 |
55 |
60 |
42.4 |
90 |
5 |
14 |
4 |
| 1
½ |
40 |
130 |
16 |
14 |
14 |
3 |
80 |
49.5 |
26 |
38 |
7 |
62 |
70 |
48.3 |
100 |
5 |
14 |
4 |
|
2" |
50 |
140 |
16 |
14 |
14 |
3 |
90 |
62.0 |
28 |
38 |
8 |
74 |
80 |
60.3 |
110 |
5 |
14 |
4 |
| 2
½ |
65 |
160 |
16 |
14 |
14 |
3 |
110 |
74.7 |
32 |
38 |
9 |
88 |
100 |
76.1 |
130 |
6 |
14 |
4 |
|
3 |
80 |
190 |
18 |
16 |
16 |
3 |
128 |
90.7 |
34 |
42 |
10 |
102 |
110 |
88.9 |
150 |
6 |
18 |
4 |
| 4 |
100 |
210 |
18 |
16 |
16 |
3 |
148 |
116.1 |
40 |
45 |
10 |
130 |
130 |
114.3 |
170 |
6 |
18 |
4 |
|
5 |
125 |
240 |
20 |
18 |
18 |
3 |
178 |
143.8 |
44 |
48 |
10 |
155 |
160 |
139.7 |
200 |
6 |
18 |
8 |
| 6 |
150 |
265 |
20 |
18 |
18 |
3 |
202 |
170.7 |
44 |
48 |
12 |
184 |
185 |
168.3 |
225 |
8 |
18 |
8 |
|
8 |
200 |
320 |
22 |
20 |
20 |
3 |
258 |
221.5 |
44 |
55 |
15 |
236 |
240 |
219.1 |
280 |
8 |
18 |
8 |
| 10 |
250 |
375 |
24 |
22 |
22 |
3 |
312 |
276.4 |
44 |
60 |
15 |
290 |
295 |
273.0 |
335 |
10 |
18 |
12 |
|
12 |
300 |
440 |
24 |
22 |
22 |
4 |
365 |
327.2 |
44 |
62 |
15 |
342 |
355 |
323.9 |
395 |
10 |
22 |
12 |
| 14 |
350 |
490 |
26 |
22 |
22 |
4 |
415 |
359.2 |
- |
62 |
15 |
385 |
- |
355.6 |
445 |
10 |
22 |
12 |
|
16 |
400 |
540 |
28 |
22 |
22 |
4 |
465 |
410.5 |
- |
65 |
15 |
438 |
- |
406.4 |
495 |
10 |
22 |
16 |
| 18 |
450 |
595 |
30 |
24 |
24 |
4 |
520 |
461.8 |
- |
65 |
15 |
492 |
- |
457.0 |
550 |
12 |
22 |
16 |
|
20 |
500 |
645 |
30 |
24 |
24 |
4 |
570 |
513.1 |
- |
68 |
15 |
538 |
- |
508.0 |
600 |
12 |
22 |
20 |
| 24 |
600 |
755 |
32 |
24 |
34 |
5 |
670 |
616.0 |
- |
70 |
16 |
640 |
- |
610.0 |
705 |
12 |
26 |
20 |
BS4504:Part
1:1969 PIPE FLANGES
Dimensions of Nominal Pressure 10 Flanges
| N.B |
Size |
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
No.
of
Holes |
|
|
D |
C1 |
C2 |
C3 |
F |
E |
B |
H1 |
H2 |
H3 |
N1 |
N2 |
A |
G |
K |
R |
L |
| Ins |
mm |
|
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|
|
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|
|
8 |
200 |
340 |
24 |
24 |
24 |
3 |
268 |
221.5 |
44 |
62 |
16 |
235 |
247 |
219.1 |
190 |
295 |
10 |
22 |
8 |
| 10 |
250 |
395 |
26 |
26 |
26 |
3 |
320 |
276.4 |
46 |
68 |
16 |
292 |
292 |
273.0 |
237 |
350 |
12 |
22 |
12 |
|
12 |
300 |
445 |
26 |
26 |
26 |
4 |
370 |
327.2 |
46 |
68 |
16 |
344 |
344 |
323.9 |
285 |
400 |
12 |
22 |
12 |
| 14 |
350 |
505 |
28 |
26 |
26 |
4 |
430 |
359.2 |
- |
68 |
16 |
385 |
- |
355.6 |
332 |
460 |
12 |
22 |
16 |
|
16 |
400 |
565 |
32 |
26 |
26 |
4 |
482 |
410.5 |
- |
72 |
16 |
440 |
- |
406.4 |
380 |
515 |
12 |
26 |
16 |
| 18 |
450 |
615 |
36 |
28 |
28 |
4 |
532 |
461.8 |
- |
72 |
16 |
492 |
- |
457.2 |
428 |
565 |
12 |
26 |
20 |
|
20 |
500 |
670 |
38 |
28 |
28 |
4 |
585 |
513.1 |
- |
75 |
16 |
542 |
- |
508.0 |
475 |
620 |
12 |
26 |
20 |
| 24 |
600 |
780 |
42 |
28 |
- |
5 |
685 |
616.0 |
- |
80 |
18 |
642 |
- |
609.6 |
- |
725 |
12 |
30 |
20 |
BS4504:Part
1:1969 PIPE FLANGES
Dimensions of Nominal Pressure 16 Flanges
| N.B |
Size |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
No.
of
Holes |
|
|
D |
C1 |
C2 |
C3 |
F |
E |
B |
H1 |
H2 |
H3 |
N1 |
N2 |
A |
G |
K |
R |
L |
| Ins |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
3/8 |
10 |
90 |
14 |
14 |
14 |
2 |
40 |
18.2 |
20 |
35 |
6 |
28 |
30 |
17.2 |
- |
60 |
4 |
14 |
4 |
| ½ |
15 |
95 |
14 |
14 |
14 |
2 |
45 |
22.4 |
20 |
35 |
6 |
32 |
35 |
21.3 |
- |
65 |
4 |
14 |
4 |
|
¾ |
20 |
105 |
16 |
16 |
16 |
2 |
58 |
27.7 |
24 |
38 |
6 |
39 |
45 |
26.9 |
- |
75 |
4 |
14 |
4 |
| 1" |
25 |
115 |
16 |
16 |
16 |
2 |
68 |
34.5 |
24 |
38 |
6 |
46 |
52 |
33.7 |
- |
85 |
4 |
14 |
4 |
|
1
¼ |
32 |
140 |
16 |
16 |
16 |
2 |
78 |
43.2 |
26 |
40 |
6 |
56 |
60 |
42.4 |
- |
100 |
6 |
18 |
4 |
| 1
½ |
40 |
150 |
16 |
16 |
16 |
3 |
88 |
49.5 |
26 |
42 |
7 |
64 |
70 |
48.3 |
- |
110 |
6 |
18 |
4 |
|
2" |
50 |
165 |
18 |
18 |
18 |
3 |
102 |
62.0 |
28 |
45 |
8 |
74 |
84 |
60.3 |
- |
125 |
6 |
18 |
4 |
| 2
½ |
65 |
185 |
18 |
18 |
18 |
3 |
122 |
74.7 |
32 |
45 |
10 |
92 |
104 |
76.1 |
55 |
145 |
6 |
18 |
4 |
|
3 |
80 |
200 |
20 |
20 |
20 |
3 |
138 |
90.7 |
34 |
50 |
10 |
110 |
118 |
88.9 |
70 |
160 |
8 |
18 |
8 |
| 4 |
100 |
220 |
20 |
20 |
20 |
3 |
158 |
116.1 |
40 |
52 |
12 |
130 |
140 |
114.3 |
90 |
180 |
8 |
18 |
8 |
|
5 |
125 |
250 |
22 |
22 |
22 |
3 |
188 |
143.8 |
44 |
55 |
12 |
158 |
168 |
139.7 |
115 |
210 |
8 |
18 |
8 |
| 6 |
150 |
285 |
22 |
22 |
22 |
3 |
212 |
170.7 |
44 |
55 |
12 |
184 |
195 |
168.3 |
140 |
240 |
10 |
22 |
8 |
|
8 |
200 |
340 |
24 |
24 |
24 |
3 |
268 |
221.5 |
44 |
62 |
16 |
234 |
246 |
219.1 |
190 |
295 |
10 |
22 |
12 |
| 10 |
250 |
405 |
26 |
26 |
26 |
3 |
320 |
276.4 |
46 |
70 |
16 |
288 |
298 |
273.0 |
237 |
355 |
12 |
26 |
12 |
|
12 |
300 |
460 |
28 |
28 |
28 |
4 |
378 |
327.2 |
46 |
78 |
16 |
342 |
350 |
323.9 |
285 |
410 |
12 |
26 |
12 |
| 14 |
350 |
520 |
32 |
30 |
30 |
4 |
438 |
359.2 |
- |
82 |
16 |
390 |
400 |
355.6 |
332 |
470 |
12 |
26 |
16 |
|
16 |
400 |
580 |
36 |
32 |
32 |
4 |
490 |
410.5 |
- |
85 |
16 |
444 |
456 |
406.4 |
380 |
525 |
12 |
30 |
16 |
| 18 |
450 |
640 |
40 |
34 |
34 |
4 |
550 |
461.8 |
- |
87 |
16 |
490 |
502 |
457.2 |
428 |
585 |
12 |
30 |
20 |
|
20 |
500 |
715 |
44 |
34 |
36 |
4 |
610 |
513.1 |
- |
90 |
16 |
546 |
559 |
508.0 |
475 |
650 |
12 |
33 |
20 |
| 24 |
600 |
840 |
52 |
36 |
- |
5 |
725 |
616.0 |
- |
95 |
18 |
650 |
658 |
609.6 |
- |
770 |
12 |
36 |
20 |
BS4504:Part
1:1969 PIPE FLANGES
Dimensions of Nominal Pressure 25 Flanges
| N.B |
Size |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
No.
of
Holes |
|
|
D |
C1 |
C2 |
C3 |
F |
E |
B |
H1 |
H2 |
H3 |
N1 |
N2 |
A |
G |
K |
X |
Y |
R |
L |
| Ins |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
8 |
200 |
360 |
28 |
30 |
30 |
3 |
278 |
221.5 |
52 |
80 |
16 |
244 |
256 |
219.1 |
190 |
310 |
360 |
32 |
10 |
26 |
12 |
| 10 |
250 |
425 |
32 |
32 |
32 |
3 |
335 |
276.4 |
60 |
88 |
18 |
298 |
310 |
273.0 |
237 |
370 |
425 |
40 |
12 |
30 |
12 |
|
12 |
300 |
485 |
38 |
34 |
34 |
4 |
395 |
327.2 |
67 |
92 |
18 |
352 |
364 |
323.9 |
285 |
430 |
485 |
48 |
12 |
30 |
16 |
| 14 |
350 |
555 |
42 |
38 |
38 |
4 |
450 |
359.2 |
- |
100 |
20 |
398 |
- |
355.6 |
332 |
490 |
- |
- |
12 |
33 |
16 |
|
16 |
400 |
620 |
46 |
40 |
40 |
4 |
505 |
410.5 |
- |
110 |
20 |
452 |
- |
406.4 |
380 |
550 |
- |
- |
12 |
36 |
16 |
| 18 |
450 |
670 |
52 |
42 |
42 |
4 |
555 |
461.8 |
- |
110 |
20 |
505 |
- |
457.2 |
425 |
600 |
- |
- |
12 |
36 |
20 |
|
20 |
500 |
730 |
58 |
44 |
44 |
4 |
615 |
513.1 |
- |
125 |
20 |
558 |
- |
508.0 |
475 |
660 |
- |
- |
12 |
36 |
20 |
| 24 |
600 |
845 |
66 |
46 |
46 |
5 |
720 |
616.0 |
- |
125 |
20 |
660 |
- |
609.6 |
- |
770 |
- |
- |
12 |
39 |
20 |
BS4504:Part
1:1969 PIPE FLANGES
Dimensions of Nominal Pressure 40 Flanges
| N.B |
Size |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
No.
of
Holes |
|
|
D |
C1 |
C2 |
C3 |
F |
E |
B |
H1 |
H2 |
H3 |
N1 |
N2 |
A |
G |
K |
X |
Y |
R |
L |
| Ins |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3/8 |
10 |
90 |
16 |
16 |
16 |
2 |
40 |
18.2 |
22 |
35 |
6 |
28 |
30 |
17.2 |
- |
60 |
90 |
16 |
4 |
14 |
4 |
| ½ |
15 |
95 |
16 |
16 |
16 |
2 |
45 |
22.4 |
22 |
38 |
6 |
32 |
35 |
21.3 |
- |
65 |
95 |
16 |
4 |
14 |
4 |
|
¾ |
20 |
105 |
18 |
18 |
18 |
2 |
58 |
27.7 |
26 |
40 |
6 |
40 |
45 |
26.9 |
- |
75 |
105 |
18 |
4 |
14 |
4 |
| 1" |
25 |
115 |
18 |
18 |
18 |
2 |
68 |
34.5 |
28 |
40 |
6 |
46 |
52 |
33.7 |
- |
85 |
115 |
18 |
4 |
14 |
4 |
|
1
¼ |
32 |
140 |
18 |
18 |
18 |
2 |
78 |
43.2 |
30 |
42 |
6 |
55 |
60 |
42.4 |
- |
100 |
140 |
18 |
6 |
18 |
4 |
| 1
½ |
40 |
150 |
20 |
18 |
18 |
3 |
88 |
49.5 |
32 |
45 |
7 |
64 |
70 |
48.3 |
- |
110 |
150 |
20 |
6 |
18 |
4 |
|
2" |
50 |
165 |
20 |
20 |
20 |
3 |
102 |
62.0 |
34 |
48 |
8 |
75 |
85 |
60.3 |
- |
125 |
165 |
22 |
6 |
18 |
4 |
| 2
½ |
65 |
185 |
22 |
22 |
22 |
3 |
122 |
74.7 |
38 |
52 |
10 |
90 |
105 |
76.1 |
55 |
145 |
185 |
24 |
6 |
18 |
8 |
|
3 |
80 |
200 |
24 |
24 |
24 |
3 |
138 |
90.7 |
40 |
58 |
12 |
105 |
118 |
88.9 |
70 |
160 |
200 |
24 |
8 |
18 |
8 |
| 4 |
100 |
235 |
26 |
24 |
24 |
3 |
162 |
116.1 |
44 |
65 |
12 |
134 |
145 |
114.3 |
90 |
190 |
235 |
26 |
8 |
22 |
8 |
|
5 |
125 |
270 |
28 |
26 |
26 |
3 |
188 |
143.8 |
48 |
68 |
12 |
162 |
170 |
139.7 |
115 |
220 |
270 |
28 |
8 |
26 |
8 |
| 6 |
150 |
300 |
30 |
28 |
28 |
3 |
218 |
170.7 |
52 |
75 |
12 |
192 |
200 |
168.3 |
140 |
250 |
300 |
32 |
10 |
26 |
8 |
|
8 |
200 |
375 |
34 |
34 |
34 |
3 |
285 |
221.5 |
52 |
88 |
16 |
244 |
260 |
219.1 |
190 |
320 |
375 |
34 |
10 |
30 |
12 |
| 10 |
250 |
450 |
42 |
38 |
38 |
3 |
345 |
276.4 |
60 |
105 |
18 |
306 |
320 |
273.0 |
237 |
385 |
450 |
38 |
12 |
33 |
12 |
|
12 |
300 |
515 |
50 |
42 |
42 |
4 |
410 |
327.2 |
67 |
115 |
18 |
362 |
380 |
323.9 |
285 |
450 |
515 |
42 |
12 |
33 |
16 |
| 14 |
350 |
580 |
56 |
46 |
46 |
4 |
465 |
359.2 |
- |
125 |
20 |
408 |
- |
355.6 |
332 |
510 |
580 |
46 |
12 |
36 |
16 |
|
16 |
400 |
660 |
64 |
50 |
50 |
4 |
535 |
410.5 |
- |
135 |
20 |
462 |
- |
406.4 |
380 |
585 |
660 |
50 |
12 |
39 |
16 |
| 18 |
450 |
685 |
68 |
50 |
54 |
4 |
560 |
461.8 |
- |
135 |
20 |
500 |
- |
457.2 |
425 |
610 |
685 |
50 |
12 |
39 |
20 |
|
20 |
500 |
755 |
72 |
52 |
56 |
4 |
615 |
513.1 |
- |
140 |
20 |
562 |
- |
508.0 |
475 |
671 |
755 |
52 |
12 |
42 |
20 |
|