Blind Flange Manufacturer, Supplier and Exporter in Mumbai, India
| Blind Flange Specifications |
| Family |
Blind Flange |
Shape |
Blind |
| Material |
Stainless Steel, Carbon Steel, Alloy Steel, Duplex Steel, Nickel Alloy |
Make |
TII |
| Size |
1/8″-48″ |
Thickness |
SCH 5-SCH 160 |
| Type |
Seamless, Welded(ERW), Fabricated |
Variation |
Equal , Reducing |
| Finish |
Shot Blast, Sand Blast, Electro polish |
End |
Bevelled |
| Marking |
TII-Specs-Description-Heat No. |
Packing |
Protected by Cap |
| Dimensions of Class 150 Blind Flanges as per ASME B16.5 |
| NPS |
F. Dia |
Dia of Bolt Circle |
Dia of Bolt Holes |
No. of Holes |
Thk of Flange |
Dia of Hub |
Dia of R/F |
| (MM) |
(Inches) |
O |
A |
D |
|
C |
E |
R |
| 15 |
1/2 |
88.9 |
60.3 |
15.9 |
4 |
11.1 |
30.2 |
34.9 |
| 20 |
3/4 |
98.4 |
69.8 |
15.9 |
4 |
12.7 |
38.1 |
42.9 |
| 25 |
1 |
107.9 |
79.4 |
15.9 |
4 |
14.3 |
49.2 |
50.8 |
| 32 |
1 1/4 |
117.5 |
88.9 |
15.9 |
4 |
15.9 |
58.7 |
63.5 |
| 40 |
1 1/2 |
127.0 |
98.0 |
15.9 |
4 |
17.5 |
65.1 |
73.0 |
| 50 |
2 |
152.4 |
120.6 |
19.0 |
4 |
19.0 |
77.8 |
92.1 |
| 65 |
2 1/2 |
177.8 |
139.7 |
19.0 |
4 |
22.0 |
90.5 |
104.8 |
| 80 |
3 |
190.5 |
152.4 |
19.0 |
4 |
23.8 |
107.9 |
127.0 |
| 100 |
4 |
228.6 |
190.5 |
19.0 |
8 |
23.8 |
134.9 |
157.2 |
| 125 |
5 |
254.0 |
215.9 |
22.2 |
8 |
23.8 |
163.5 |
185.7 |
| 150 |
6 |
279.4 |
241.3 |
22.2 |
8 |
25.4 |
192.1 |
215.9 |
| 200 |
8 |
342.9 |
298.4 |
22.2 |
8 |
28.6 |
246.1 |
269.9 |
| 250 |
10 |
406.4 |
361.9 |
25.4 |
12 |
30.2 |
304.8 |
323.8 |
| 300 |
12 |
482.6 |
431.8 |
25.4 |
12 |
31.8 |
361.5 |
381.0 |
| 350 |
14 |
533.4 |
476.2 |
28.6 |
12 |
34.9 |
400.0 |
412.7 |
| 400 |
16 |
596.9 |
539.7 |
28.6 |
16 |
36.5 |
457.2 |
469.9 |
| 450 |
18 |
635.0 |
577.8 |
31.7 |
16 |
39.7 |
504.8 |
533.4 |
| 500 |
20 |
698.1 |
635.0 |
31.7 |
20 |
42.9 |
558.8 |
584.2 |
| 600 |
24 |
812.8 |
749.3 |
34.9 |
20 |
47.6 |
663.6 |
692.1 |
| Dimensions of Class 300 Blind Flanges as per ASME B16.5 |
| NPS |
F. Dia |
Dia of Bolt Circle |
Dia of Bolt Holes |
No. of Holes |
Thk of Flange |
Dia of Hub |
Dia of R/F |
| (MM) |
(Inches) |
O |
A |
D |
|
C |
E |
R |
| 15 |
1/2 |
95.2 |
66.7 |
15.9 |
4 |
14.3 |
38.1 |
34.9 |
| 20 |
3/4 |
117.5 |
82.5 |
19.0 |
4 |
15.9 |
47.6 |
42.9 |
| 25 |
1 |
123.8 |
88.9 |
19.0 |
4 |
17.5 |
54.0 |
50.8 |
| 32 |
1 1/4 |
133.3 |
98.4 |
19.0 |
4 |
19.0 |
63.5 |
63.5 |
| 40 |
1 1/2 |
155.6 |
114.3 |
22.2 |
4 |
20.6 |
69.8 |
73.0 |
| 50 |
2 |
165.1 |
127.0 |
19.0 |
8 |
22.2 |
84.1 |
92.1 |
| 65 |
2 1/2 |
190.5 |
149.2 |
22.2 |
8 |
25.4 |
100.0 |
104.8 |
| 80 |
3 |
209.5 |
168.3 |
22.2 |
8 |
28.6 |
117.5 |
127.0 |
| 100 |
4 |
254.0 |
200.0 |
22.2 |
8 |
31.8 |
146.0 |
157.2 |
| 125 |
5 |
279.4 |
234.9 |
22.2 |
8 |
34.9 |
177.8 |
185.7 |
| 150 |
6 |
317.5 |
269.9 |
22.2 |
12 |
36.5 |
206.4 |
215.9 |
| 200 |
8 |
381.0 |
330.2 |
25.4 |
12 |
41.3 |
260.3 |
269.9 |
| 250 |
10 |
444.5 |
387.3 |
28.6 |
16 |
47.6 |
320.7 |
323.8 |
| 300 |
12 |
520.7 |
450.8 |
31.7 |
16 |
50.8 |
374.6 |
381.0 |
| 350 |
14 |
584.2 |
514.3 |
31.7 |
20 |
54.0 |
425.4 |
412.7 |
| 400 |
16 |
647.7 |
571.5 |
34.9 |
20 |
57.2 |
482.6 |
469.9 |
| 450 |
18 |
711.2 |
628.5 |
34.9 |
24 |
60.3 |
533.4 |
533.4 |
| 500 |
20 |
774.7 |
685.8 |
34.9 |
24 |
63.5 |
587.4 |
584.2 |
| 600 |
24 |
914.4 |
812.8 |
41.3 |
24 |
69.8 |
701.7 |
692.1 |
| Dimensions of Class 600 Blind Flanges as per ASME B16.5 |
| NPS |
F. Dia |
Dia of Bolt Circle |
Dia of Bolt Holes |
No. of Holes |
Thk of Flange |
Dia of Hub |
Dia of R/F |
| (MM) |
(Inches) |
O |
A |
D |
|
C |
E |
R |
| 15 |
1/2 |
95.2 |
66.7 |
15.9 |
4 |
14.3 |
38.1 |
34.9 |
| 20 |
3/4 |
117.5 |
82.5 |
19.0 |
4 |
15.9 |
47.6 |
42.9 |
| 25 |
1 |
123.8 |
88.9 |
19.0 |
4 |
17.5 |
54.0 |
50.8 |
| 32 |
1 1/4 |
133.3 |
98.4 |
19.0 |
4 |
20.6 |
63.5 |
63.5 |
| 40 |
1 1/2 |
155.6 |
114.3 |
22.2 |
4 |
22.2 |
69.8 |
73.0 |
| 50 |
2 |
165.1 |
127.0 |
19.0 |
8 |
25.4 |
84.1 |
92.1 |
| 65 |
2 1/2 |
190.5 |
149.2 |
22.2 |
8 |
28.6 |
100.0 |
104.8 |
| 80 |
3 |
209.5 |
168.3 |
22.2 |
8 |
31.8 |
117.5 |
127.0 |
| 100 |
4 |
254.0 |
215.9 |
25.4 |
8 |
38.1 |
152.4 |
157.2 |
| 125 |
5 |
279.4 |
266.7 |
28.6 |
8 |
44.4 |
188.9 |
185.7 |
| 150 |
6 |
317.5 |
292.1 |
28.6 |
12 |
47.6 |
222.2 |
215.9 |
| 200 |
8 |
381.0 |
349.2 |
31.7 |
12 |
55.6 |
273.0 |
269.9 |
| 250 |
10 |
444.5 |
431.8 |
34.9 |
16 |
63.5 |
342.9 |
323.8 |
| 300 |
12 |
520.7 |
488.9 |
34.9 |
16 |
66.7 |
400.0 |
381.0 |
| 350 |
14 |
584.2 |
527.0 |
38.1 |
20 |
69.9 |
431.8 |
412.7 |
| 400 |
16 |
647.7 |
603.2 |
41.3 |
20 |
76.2 |
495.3 |
469.9 |
| 450 |
18 |
711.2 |
654.0 |
44.4 |
24 |
82.6 |
546.1 |
533.4 |
| 500 |
20 |
774.7 |
723.9 |
44.4 |
24 |
88.9 |
609.6 |
584.2 |
| 600 |
24 |
914.4 |
838.2 |
50.8 |
24 |
101.6 |
717.5 |
692.1 |
| Dimensions of Class 900 Blind Flanges as per ASME B16.5 |
| NPS |
F. Dia |
Dia of Bolt Circle |
Dia of Bolt Holes |
No. of Holes |
Thk of Flange |
Dia of Hub |
Dia of R/F |
| (MM) |
(Inches) |
O |
A |
D |
|
C |
E |
R |
| 15 |
1/2 |
120.6 |
82.5 |
22.2 |
4 |
22.2 |
38.1 |
34.9 |
| 20 |
3/4 |
130.2 |
88.9 |
22.2 |
4 |
25.4 |
44.4 |
42.9 |
| 25 |
1 |
149.2 |
101.6 |
25.4 |
4 |
28.6 |
52.4 |
50.8 |
| 32 |
1 1/4 |
158.7 |
111.1 |
25.4 |
4 |
28.6 |
63.5 |
63.5 |
| 40 |
1 1/2 |
177.8 |
123.8 |
28.6 |
4 |
31.8 |
69.8 |
73.0 |
| 50 |
2 |
215.9 |
165.1 |
25.4 |
8 |
38.1 |
104.8 |
92.1 |
| 65 |
2 1/2 |
244.5 |
190.5 |
28.6 |
8 |
41.3 |
123.8 |
104.8 |
| 80 |
3 |
241.3 |
190.5 |
25.4 |
8 |
38.1 |
127.0 |
127.0 |
| 100 |
4 |
292.1 |
234.9 |
31.7 |
8 |
44.4 |
158.7 |
157.1 |
| 125 |
5 |
349.2 |
279.4 |
35.0 |
8 |
50.8 |
190.5 |
185.7 |
| 150 |
6 |
381.0 |
317.5 |
31.7 |
12 |
55.6 |
234.9 |
215.9 |
| 200 |
8 |
469.9 |
393.7 |
38.1 |
12 |
63.5 |
298.4 |
269.3 |
| 250 |
10 |
546.1 |
469.9 |
38.1 |
16 |
69.8 |
368.3 |
323.8 |
| 300 |
12 |
609.6 |
533.4 |
38.1 |
20 |
79.3 |
419.1 |
381.0 |
| Dimensions of Class 1500 Blind Flanges as per ASME B16.5 |
| NPS |
F. Dia |
Dia of Bolt Circle |
Dia of Bolt Holes |
No. of Holes |
Thk of Flange |
Dia of Hub |
Dia of R/F |
| (MM) |
(Inches) |
O |
A |
D |
|
C |
E |
R |
| 15 |
1/2 |
120.6 |
82.5 |
22.2 |
4 |
22.2 |
38.1 |
34.9 |
| 20 |
3/4 |
130.2 |
88.9 |
22.2 |
4 |
25.4 |
44.4 |
42.9 |
| 25 |
1 |
149.2 |
101.6 |
25.4 |
4 |
28.6 |
52.4 |
50.8 |
| 32 |
1 1/4 |
158.7 |
111.1 |
25.4 |
4 |
28.6 |
63.5 |
63.5 |
| 40 |
1 1/2 |
177.8 |
123.8 |
28.6 |
4 |
31.8 |
69.8 |
73.0 |
| 50 |
2 |
215.9 |
165.1 |
25.4 |
8 |
38.1 |
104.8 |
92.1 |
| 65 |
2 1/2 |
244.5 |
190.5 |
28.6 |
8 |
41.3 |
123.8 |
104.8 |
| 80 |
3 |
266.7 |
203.2 |
31.7 |
8 |
47.6 |
133.3 |
127.0 |
| 100 |
4 |
311.1 |
241.3 |
34.9 |
8 |
54.0 |
161.9 |
157.1 |
| 125 |
5 |
374.6 |
292.1 |
41.3 |
8 |
73.0 |
196.8 |
185.7 |
| 150 |
6 |
393.7 |
317.5 |
38.1 |
12 |
82.6 |
228.6 |
215.9 |
| 200 |
8 |
482.6 |
393.5 |
44.4 |
12 |
92.1 |
292.1 |
269.3 |
| 250 |
10 |
584.2 |
482.6 |
50.8 |
12 |
107.9 |
368.3 |
323.8 |
| 300 |
12 |
673.1 |
571.5 |
54.0 |
16 |
123.8 |
450.8 |
381.0 |
| Dimensions of Class 2500 Blind Flanges as per ASME B16.5 |
| NPS |
F. Dia |
Dia of Bolt Circle |
Dia of Bolt Holes |
No. of Holes |
Thk of Flange |
Dia of Hub |
Dia of R/F |
| (MM) |
(Inches) |
O |
A |
D |
|
C |
E |
R |
| 15 |
1/2 |
133.7 |
88.9 |
22.2 |
4 |
30.2 |
42.9 |
34.9 |
| 20 |
3/4 |
139.7 |
95.2 |
22.2 |
4 |
31.7 |
50.8 |
42.9 |
| 25 |
1 |
158.7 |
107.9 |
25.4 |
4 |
34.9 |
57.1 |
50.8 |
| 32 |
1 1/4 |
184.1 |
130.2 |
28.6 |
4 |
38.1 |
73.0 |
63.5 |
| 40 |
1 1/2 |
203.2 |
146.0 |
31.7 |
4 |
44.4 |
79.4 |
73.0 |
| 50 |
2 |
234.9 |
171.9 |
28.6 |
8 |
50.8 |
95.2 |
92.1 |
| 65 |
2 1/2 |
266.7 |
196.8 |
31.7 |
8 |
57.1 |
114.3 |
104.8 |
| 80 |
3 |
304.8 |
228.6 |
34.9 |
8 |
66.7 |
133.3 |
127.0 |
| 100 |
4 |
355.6 |
273.0 |
41.3 |
8 |
76.2 |
165.1 |
157.2 |
| 125 |
5 |
419.1 |
323.8 |
47.6 |
8 |
92.1 |
203.2 |
185.7 |
| 150 |
6 |
482.6 |
368.3 |
54.0 |
8 |
107.9 |
234.9 |
215.9 |
| 200 |
8 |
552.4 |
438.1 |
54.0 |
12 |
127.0 |
304.8 |
269.9 |
| 250 |
10 |
673.1 |
539.7 |
66.7 |
12 |
165.1 |
374.6 |
323.8 |
| 300 |
12 |
762.0 |
619.1 |
73.0 |
12 |
184.1 |
441.3 |
381.0 |
| Tolerance Chart |
| *Outside diameter |
O.D. 500 or smaller |
|
± 1.6 |
| O.D. over 600 |
|
± 3.1 |
| Inside diameter |
threaded |
to standard gauge limits slip on: lap joint: socket welding |
| 250 and smaller |
+ 0.7 |
− 0.0 |
| 300 and largee |
+ 1.6 |
− 0.0 |
| diameter of counter bore |
threaded |
|
|
| 250 and smaller |
+ 0.7 |
− 0.0 |
| 300 and large |
+ 1.6 |
− 0.0 |
| *Outside diameter of hub |
300 and smaller |
+ 2.3 |
− 1.6 |
| 350 and larger |
|
± 3.1 |
| diameter of contract face |
1.6 raised face |
|
± 0.7 |
| 6.3 raised face : tongue and grooved male and female |
|
± 0.4 |
| thickness |
450 and smaller |
+ 3.1 |
− 0.0 |
| 500 and larger |
+ 4.7 |
− 0.0 |
| *length through hub |
250 and smaller |
|
± 1.6 |
| 300 and larger |
|
± 3.1 |
| drilling |
bolt circle |
|
± 1.6 |
| bolt hole spacing |
|
± 0.7 |
| eccenticity with respect of to bore |
|
0.7 max |
