A blind flange, also referred to as a closure plate flange, is installed at the end of a piping system to seal off or terminate the pipe. Since it has no center hole (bore), no fluid or gas can pass through it. Blind flanges are commonly used to isolate sections of pipe, valves, or pressure vessels. They are available in a variety of sizes and pressure ratings, with options for flat, raised, or ring-type joint faces.
A blind flange is often preferred over a butt weld cap when future extensions of the pipeline may be needed or when internal inspection of the pipe is required—removing the flange allows easy access to the pipe’s interior. Additionally, it can serve as an access point for cleaning rods in drain systems.
Specification of Blind Flanges
| ASME B16.5 Blind Flange Size Chart | 1/2" (15 NB) to 48" (1200NB) DN10~DN5000 |
|---|---|
| Rtj Blind Flange Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Pn16 Blind Flange Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 Blrf Flange |
| JIS | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K Pn16 Blind Flange |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar Rtj Blind Flange |
| Blrf Flange Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS Blind Flange Raised Face |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar Class 300 Blind Flange |
| Most common types of Carbon Steel blind flange | Forged / Threaded / Screwed / Plate |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Production technique |
|
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized Blind Flange |
| Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove |
| Special design |
As per your drawing AS, ANSI, BS, DIN and JIS |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Manufacturer of |
ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
|
| Origin | Indian / West Europe / Japan / USA / Korean |
| Rtj Blind Flange Uses & application |
|
| Export to | Indonesia, Ukraine, India, Ireland, Singapore, Saudi Arabia, Spain, Dubai, Peru, Thailand, Korea, Iran, Canada, USA, Brazil, Egypt, Oman, etc |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
Material of Blind Flange
| Carbon Steel Blind Flange Raised Face |
|
| Austenitic Stainless Steel Blrf Flanges |
|
| Alloy Steel High-Temp Pn16 Blind Flange |
|
| Alloy Steel Low-Temp Class 300 Blind Flange |
|
| Nickel Alloy Blrf Flange |
|
| Titanium Class 300 Blind Flange |
|
Type of Blind Flanges
Forged blind flange
ASME B16.5 BLRF Flange
AWWA C207 Class d table e blind flange
MSS SP-44 npt blind flange Blind Flange
ASTM A182 F304 Paddle Blind Flange
B16.47 Series A Blind Flange
ASME B16.47 Series b Ring Joint Blind Flange
ASME B16.5 Blind Flange
Stainless Steel Blind Flange
Alloy Steel Reducing Blind Flange
ANSI B16.5 Flat Face Blind Flange
EN 1092 blind flange
Class 150 blind flange
Pn16 blind flange
Class 300 blind flange
Duplex Steel Blind pipe flange
Class 150 Blind Flange Dimensions
| Nominal Pipe Size |
"A" (O.D.) |
"B" (Thk.) |
"C" (RF Dia.) |
"D" (B.C.D.) |
# Bolt Holes |
Dia. of Bolt Holes |
Approx. Weight |
|---|---|---|---|---|---|---|---|
| 1/2" | 3-1/2 | 7/16 | 1-3/8 | 2-3/8 | 4 | 5/8 | 2 |
| 3/4" | 3-7/8 | 1/2 | 1-11/16 | 2-3/4 | 4 | 5/8 | 2 |
| 1" | 4-1/4 | 9/16 | 2 | 3-1/8 | 4 | 5/8 | 2 |
| 1-1/4" | 4-5/8 | 5/8 | 2-1/2 | 3-1/2 | 4 | 5/8 | 3 |
| 1-1/2" | 5 | 11/16 | 2-7/8 | 3-7/8 | 4 | 5/8 | 3 |
| 2" | 6 | 3/4 | 3-5/8 | 4-3/4 | 4 | 3/4 | 4 |
| 2-1/2" | 7 | 7/8 | 4-1/8 | 5-1/2 | 4 | 3/4 | 7 |
| 3" | 7-1/2 | 15/16 | 5 | 6 | 4 | 3/4 | 9 |
| 3-1/2" | 8-1/2 | 15/16 | 5-1/2 | 7 | 8 | 3/4 | 13 |
| 4" | 9 | 15/16 | 6-3/16 | 7-1/2 | 8 | 3/4 | 17 |
| 5" | 10 | 15/16 | 7-5/16 | 8-1/2 | 8 | 7/8 | 20 |
| 6" | 11 | 1 | 8-1/2 | 9-1/2 | 8 | 7/8 | 27 |
| 8" | 13-1/2 | 1-1/8 | 10-5/8 | 11-3/4 | 8 | 7/8 | 47 |
| 10" | 16 | 1-3/16 | 12-3/4 | 14-1/4 | 12 | 1 | 67 |
| 12" | 19 | 1-1/4 | 15 | 17 | 12 | 1 | 123 |
| 14" | 21 | 1-3/8 | 16-1/4 | 18-3/4 | 12 | 1-1/8 | 139 |
| 16" | 23-1/2 | 1-7/16 | 18-1/2 | 21-1/4 | 16 | 1-1/8 | 187 |
| 18" | 25 | 1-9/16 | 21 | 22-3/4 | 16 | 1-1/4 | 217 |
| 20" | 27-1/2 | 1-11/16 | 23 | 25 | 20 | 1-1/4 | 283 |
| 24" | 32 | 1-7/8 | 27-1/4 | 29-1/2 | 20 | 1-3/8 | 415 |
| 1/16" raised face included in flange thickness. | |||||||
Class 300 Blind Flange Dimensions
| Nominal Pipe Size |
"A" (O.D.) |
"B" (Thk.) |
"C" (RF Dia.) |
"D" (B.C.D.) |
# Bolt Holes |
Dia. of Bolt Holes |
Approx. Weight |
|---|---|---|---|---|---|---|---|
| 1/2" | 3-3/4 | 9/16 | 1-3/8 | 2-5/8 | 4 | 5/8 | 2 |
| 3/4" | 4-5/8 | 5/8 | 1-11/16 | 3-1/4 | 4 | 3/4 | 3 |
| 1" | 4-7/8 | 11/16 | 2 | 3-1/2 | 4 | 3/4 | 4 |
| 1-1/4" | 5-1/4 | 3/4 | 2-1/2 | 3-7/8 | 4 | 3/4 | 6 |
| 1-1/2" | 6-1/8 | 13/16 | 2-7/8 | 4-1/2 | 4 | 7/8 | 7 |
| 2" | 6-1/2 | 7/8 | 3-5/8 | 5 | 8 | 3/4 | 8 |
| 2-1/2" | 7-1/2 | 1 | 4-1/8 | 5-7/8 | 8 | 7/8 | 12 |
| 3" | 8-1/4 | 1-1/8 | 5 | 6-5/8 | 8 | 7/8 | 16 |
| 3-1/2" | 9 | 1-3/16 | 5-1/2 | 7-1/4 | 8 | 7/8 | 21 |
| 4" | 10 | 1-1/4 | 6-3/16 | 7-7/8 | 8 | 7/8 | 28 |
| 5" | 11 | 1-3/8 | 7-5/16 | 9-1/4 | 8 | 7/8 | 37 |
| 6" | 12-1/2 | 1-7/16 | 8-1/2 | 10-5/8 | 12 | 7/8 | 48 |
| 8" | 15 | 1-5/8 | 10-5/8 | 13 | 12 | 1 | 79 |
| 10" | 17-1/2 | 1-7/8 | 12-3/4 | 15-1/4 | 16 | 1-1/8 | 122 |
| 12" | 20-1/2 | 2 | 15 | 17-3/4 | 16 | 1-1/4 | 183 |
| 14" | 23 | 2-1/8 | 16-1/4 | 20-1/4 | 20 | 1-1/4 | 241 |
| 16" | 25-1/2 | 2-1/4 | 18-1/2 | 22-1/2 | 20 | 1-3/8 | 315 |
| 18" | 28 | 2-3/8 | 21 | 24-3/4 | 24 | 1-3/8 | 414 |
| 20" | 30-1/2 | 2-1/2 | 23 | 27 | 24 | 1-3/8 | 515 |
| 24" | 36 | 2-3/4 | 27-1/4 | 32 | 24 | 1-5/8 | 800 |
| 1/16" raised face included in flange thickness. | |||||||
Class 600 Blind Flange Dimensions
| ANSI/ASME/ASA B16.5 600lb/sq.in. Flange BLIND-RF | |||||||
|---|---|---|---|---|---|---|---|
| ø | D | b | g | k | Holes | l | Kg. |
| 1/2" | 95,2 | 14,3 | 34,9 | 66,7 | 4 | 15,9 | 0,700 |
| 3/4" | 117,5 | 15,9 | 42,9 | 82,5 | 4 | 19,0 | 1,200 |
| 1" | 123,8 | 17,5 | 50,8 | 88,9 | 4 | 19,0 | 1,500 |
| 1 1/4" | 133,3 | 20,6 | 63,5 | 98,4 | 4 | 19,0 | 2,000 |
| 1 1/2" | 155,6 | 22,2 | 73,0 | 114,3 | 4 | 22,2 | 3,200 |
| 2" | 165,1 | 25,4 | 92,1 | 127,0 | 8 | 19,0 | 4,300 |
| 2 1/2" | 190,5 | 28,6 | 104,8 | 149,2 | 8 | 22,2 | 6,000 |
| 3" | 209,5 | 31,7 | 127,0 | 168,3 | 8 | 22,2 | 8,000 |
| 3 1/2" | 228,6 | 34,9 | 139,7 | 184,1 | 8 | 25,4 | 10,500 |
| 4" | 273,0 | 38,1 | 157,2 | 215,9 | 8 | 25,4 | 18,000 |
| 5" | 330,2 | 44,4 | 185,7 | 266,7 | 8 | 28,6 | 28,500 |
| 6" | 355,6 | 47,6 | 215,9 | 292,1 | 12 | 28,6 | 35,500 |
| 8" | 419,1 | 55,6 | 269,9 | 349,2 | 12 | 31,7 | 58,000 |
| 10" | 508,0 | 63,5 | 323,8 | 431,8 | 16 | 34,9 | 98,000 |
| 12" | 558,8 | 66,7 | 381,0 | 488,9 | 20 | 34,9 | 125,000 |
| 14" | 603,2 | 69,8 | 412,7 | 527,0 | 20 | 38,1 | 151,000 |
| 16" | 685,8 | 76,2 | 469,9 | 603,2 | 20 | 41,3 | 215,000 |
| 18" | 742,9 | 82,5 | 533,4 | 654,0 | 20 | 44,4 | 287,000 |
| 20" | 812,8 | 88,9 | 584,2 | 723,9 | 24 | 44,4 | 366,000 |
| 22" | 869,9 | 95,2 | 641,2 | 777,9 | 24 | 47,6 | 437,000 |
| 24" | 939,8 | 101,6 | 692,1 | 838,2 | 24 | 50,8 | 532,000 |
JIS 5K Blind Flange Dimensions
|
Pipe |
Pipe |
Bo |
D |
t |
T |
G |
f |
r |
H |
X |
C |
Holes |
Bolt Dia. |
|||||||||
|
inch |
mm |
|||||||||||||||||||||
|
3/8 |
10 |
17.3 |
17.8 |
+0.5 |
75 |
+1.0 |
9 |
+1.0 |
±1.0 |
42 |
±0.8 |
1 |
+2.0 |
+2.0 |
55 |
±0.5 |
4 |
12 |
||||
|
1/2 |
15 |
21.7 |
22.2 |
80 |
9 |
48 |
1 |
60 |
4 |
12 |
||||||||||||
|
3/4 |
20 |
27.2 |
27.7 |
85 |
10 |
52 |
1 |
65 |
4 |
12 |
||||||||||||
|
1 |
25 |
34.0 |
34.5 |
95 |
10 |
62 |
1 |
75 |
4 |
12 |
||||||||||||
|
1-1/4 |
32 |
42.7 |
43.2 |
115 |
12 |
72 |
2 |
90 |
4 |
15 |
||||||||||||
|
1-1/2 |
40 |
48.6 |
49.1 |
120 |
12 |
78 |
2 |
95 |
4 |
15 |
||||||||||||
|
2 |
50 |
60.5 |
61.1 |
130 |
14 |
88 |
2 |
105 |
4 |
15 |
||||||||||||
|
2-1/2 |
65 |
76.3 |
77.1 |
155 |
14 |
112 |
2 |
130 |
4 |
15 |
||||||||||||
|
3 |
80 |
89.1 |
90.0 |
180 |
14 |
125 |
2 |
145 |
4 |
19 |
||||||||||||
|
3-1/2 |
90 |
101.6 |
102.6 |
+1.0 |
190 |
14 |
135 |
2 |
155 |
4 |
19 |
|||||||||||
|
4 |
100 |
114.3 |
115.4 |
200 |
16 |
145 |
2 |
165 |
8 |
19 |
||||||||||||
|
5 |
125 |
139.8 |
141.2 |
235 |
16 |
180 |
2 |
200 |
8 |
19 |
||||||||||||
|
6 |
150 |
165.2 |
166.6 |
265 |
18 |
210 |
2 |
230 |
8 |
19 |
||||||||||||
|
7 |
175 |
190.7 |
192.1 |
300 |
18 |
235 |
±0.9 |
2 |
260 |
±0.6 |
8 |
23 |
||||||||||
|
8 |
200 |
216.3 |
218.0 |
320 |
+1.5 |
20 |
255 |
2 |
280 |
8 |
23 |
|||||||||||
|
9 |
225 |
241.8 |
243.7 |
345 |
20 |
280 |
2 |
305 |
12 |
23 |
||||||||||||
|
10 |
250 |
267.4 |
269.5 |
385 |
22 |
+1.5 |
32 |
320 |
2 |
5 |
286 |
290 |
345 |
12 |
23 |
|||||||
|
12 |
300 |
318.5 |
321.0 |
430 |
22 |
34 |
365 |
3 |
5 |
338 |
342 |
390 |
12 |
23 |
||||||||
|
14 |
350 |
355.6 |
358.1 |
480 |
24 |
36 |
405 |
3 |
5 |
378 |
382 |
435 |
12 |
25 |
||||||||
|
16 |
400 |
406.4 |
409.0 |
+1.5 |
540 |
24 |
36 |
465 |
3 |
5 |
432 |
436 |
495 |
16 |
25 |
|||||||
|
18 |
450 |
457.2 |
460.0 |
605 |
+2.0 |
24 |
40 |
525 |
3 |
5 |
495 |
500 |
555 |
±0.8 |
16 |
25 |
||||||
|
20 |
500 |
508.0 |
511.0 |
655 |
24 |
40 |
575 |
3 |
5 |
546 |
552 |
605 |
20 |
25 |
||||||||
|
22 |
550 |
558.8 |
562.0 |
720 |
26 |
42 |
630 |
3 |
5 |
597 |
603 |
665 |
20 |
27 |
||||||||
|
24 |
600 |
609.6 |
613.0 |
+2.0 |
770 |
26 |
44 |
680 |
±1.0 |
3 |
5 |
648 |
654 |
+2.5 |
715 |
20 |
27 |
|||||
|
26 |
650 |
660.4 |
664.0 |
825 |
26 |
48 |
735 |
3 |
5 |
702 |
+2.5 |
708 |
770 |
24 |
27 |
|||||||
|
28 |
700 |
711.2 |
715.0 |
875 |
26 |
48 |
785 |
3 |
5 |
751 |
758 |
820 |
24 |
27 |
||||||||
|
30 |
750 |
762.0 |
766.0 |
945 |
28 |
52 |
±1.5 |
840 |
3 |
5 |
802 |
810 |
880 |
24 |
33 |
|||||||
|
32 |
800 |
812.8 |
817.0 |
+2.5 |
995 |
28 |
52 |
890 |
3 |
5 |
854 |
+3.0 |
862 |
+3.0 |
930 |
24 |
33 |
|||||
|
34 |
850 |
863.6 |
868.0 |
1045 |
+2.5 |
28 |
54 |
940 |
3 |
5 |
904 |
912 |
980 |
±1.0 |
24 |
33 |
||||||
|
36 |
900 |
914.4 |
919.0 |
1095 |
30 |
56 |
990 |
3 |
5 |
956 |
964 |
1030 |
24 |
33 |
||||||||
|
40 |
1000 |
1016.0 |
1021.0 |
+3.0 |
1195 |
32 |
60 |
1090 |
±1.2 |
3 |
5 |
1058 |
+3.5 |
1066 |
+3.5 |
1130 |
28 |
33 |
||||
|
44 |
1100 |
1117.6 |
1123.0 |
1305 |
32 |
1200 |
3 |
1240 |
28 |
33 |
||||||||||||
|
48 |
1200 |
1219.2 |
1224.0 |
1420 |
34 |
1305 |
3 |
1350 |
32 |
33 |
||||||||||||
|
54 |
1350 |
1371.6 |
1377.0 |
1575 |
+3.0 |
34 |
1460 |
3 |
1505 |
±1.5 |
32 |
33 |
||||||||||
|
60 |
1500 |
1524.0 |
1529.0 |
1730 |
36 |
1615 |
3 |
1660 |
36 |
33 |
||||||||||||
JIS 10K Blind Flange Dimensions
|
Pipe |
Pipe |
Bo |
D |
t |
T |
G |
f |
r |
H |
X |
C |
Holes |
Bolt Dia. |
|||||||||
|
inch |
mm |
|||||||||||||||||||||
|
3/8 |
10 |
17.3 |
17.8 |
+0.5 |
90 |
+1.0 |
12 |
+1.0 |
±1.0 |
48 |
±0.8 |
1 |
+1.5 |
+1.5 |
65 |
±0.5 |
4 |
15 |
||||
|
1/2 |
15 |
21.7 |
22.2 |
95 |
12 |
52 |
1 |
70 |
4 |
15 |
||||||||||||
|
3/4 |
20 |
27.2 |
27.7 |
100 |
14 |
58 |
1 |
75 |
4 |
15 |
||||||||||||
|
1 |
25 |
34.0 |
34.5 |
125 |
14 |
70 |
1 |
90 |
4 |
19 |
||||||||||||
|
1-1/4 |
32 |
42.7 |
43.2 |
135 |
16 |
80 |
2 |
100 |
4 |
19 |
||||||||||||
|
1-1/2 |
40 |
48.6 |
49.1 |
140 |
16 |
85 |
2 |
105 |
4 |
19 |
||||||||||||
|
2 |
50 |
60.5 |
61.1 |
155 |
16 |
100 |
2 |
120 |
4 |
19 |
||||||||||||
|
2-1/2 |
65 |
76.3 |
77.1 |
175 |
18 |
120 |
2 |
140 |
4 |
19 |
||||||||||||
|
3 |
80 |
89.1 |
90.0 |
185 |
18 |
130 |
2 |
150 |
8 |
19 |
||||||||||||
|
3-1/2 |
90 |
101.6 |
102.6 |
+1.0 |
195 |
18 |
140 |
2 |
160 |
8 |
19 |
|||||||||||
|
4 |
100 |
114.3 |
115.4 |
210 |
18 |
155 |
2 |
175 |
8 |
19 |
||||||||||||
|
5 |
125 |
139.8 |
141.2 |
250 |
20 |
185 |
2 |
210 |
8 |
23 |
||||||||||||
|
6 |
150 |
165.2 |
166.6 |
280 |
22 |
+1.5 |
215 |
2 |
240 |
8 |
23 |
|||||||||||
|
7 |
175 |
190.7 |
192.1 |
305 |
+1.5 |
22 |
32 |
240 |
±0.9 |
2 |
6 |
208 |
212 |
265 |
±0.6 |
12 |
23 |
|||||
|
8 |
200 |
216.3 |
218.0 |
330 |
22 |
32 |
265 |
2 |
6 |
234 |
238 |
290 |
12 |
23 |
||||||||
|
9 |
225 |
241.8 |
243.7 |
350 |
22 |
34 |
285 |
2 |
6 |
260 |
264 |
310 |
12 |
23 |
||||||||
|
10 |
250 |
267.4 |
269.5 |
400 |
24 |
36 |
325 |
2 |
6 |
288 |
292 |
355 |
12 |
25 |
||||||||
|
12 |
300 |
318.5 |
321.0 |
445 |
24 |
38 |
370 |
3 |
6 |
340 |
346 |
400 |
16 |
25 |
||||||||
|
14 |
350 |
355.6 |
358.1 |
490 |
26 |
42 |
415 |
3 |
6 |
380 |
386 |
445 |
16 |
25 |
||||||||
|
16 |
400 |
406.4 |
409.0 |
+1.5 |
560 |
28 |
44 |
475 |
3 |
6 |
436 |
442 |
510 |
16 |
27 |
|||||||
|
18 |
450 |
457.2 |
460.0 |
620 |
+2.0 |
30 |
48 |
530 |
3 |
6 |
496 |
+2.0 |
502 |
+2.0 |
565 |
±0.8 |
20 |
27 |
||||
|
20 |
500 |
508.0 |
511.0 |
675 |
30 |
48 |
585 |
3 |
6 |
548 |
554 |
620 |
20 |
27 |
||||||||
|
22 |
550 |
558.8 |
562.0 |
745 |
32 |
52 |
±1.5 |
640 |
3 |
6 |
604 |
610 |
680 |
20 |
33 |
|||||||
|
24 |
600 |
609.6 |
613.0 |
+2.0 |
795 |
32 |
52 |
690 |
±1.0 |
3 |
6 |
656 |
+2.5 |
662 |
+2.5 |
730 |
24 |
33 |
||||
|
26 |
650 |
660.4 |
664.0 |
845 |
34 |
56 |
740 |
3 |
6 |
706 |
712 |
780 |
24 |
33 |
||||||||
|
28 |
700 |
711.2 |
715.0 |
905 |
34 |
58 |
800 |
3 |
6 |
762 |
770 |
840 |
24 |
33 |
||||||||
|
30 |
750 |
762.0 |
766.0 |
970 |
36 |
62 |
855 |
3 |
6 |
816 |
824 |
900 |
24 |
33 |
||||||||
|
32 |
800 |
812.8 |
817.0 |
+2.5 |
1020 |
+2.5 |
36 |
64 |
905 |
3 |
6 |
868 |
+3.0 |
876 |
+3.0 |
950 |
28 |
33 |
||||
|
34 |
850 |
863.6 |
868.0 |
1070 |
36 |
66 |
955 |
3 |
6 |
920 |
928 |
1000 |
±1.0 |
28 |
33 |
|||||||
|
36 |
900 |
914.4 |
919.0 |
1120 |
38 |
70 |
1005 |
±1.2 |
3 |
6 |
971 |
979 |
1050 |
28 |
33 |
|||||||
|
40 |
1000 |
1016.0 |
1021.0 |
+3.0 |
1235 |
40 |
74 |
1110 |
3 |
6 |
1073 |
+3.5 |
1081 |
+3.5 |
1160 |
28 |
39 |
|||||
|
44 |
1100 |
1117.6 |
1123.0 |
1345 |
42 |
78 |
1220 |
3 |
8 |
1175 |
1185 |
1270 |
28 |
39 |
||||||||
|
48 |
1200 |
1219.2 |
1224.0 |
1465 |
44 |
82 |
1325 |
3 |
8 |
1278 |
1290 |
1380 |
±1.5 |
32 |
39 |
|||||||
|
54 |
1350 |
1371.6 |
1377.0 |
1630 |
+3.0 |
48 |
88 |
1480 |
3 |
8 |
1432 |
1450 |
1540 |
36 |
45 |
|||||||
|
60 |
1500 |
1524.0 |
1529.0 |
1795 |
50 |
90 |
1635 |
3 |
8 |
1585 |
1600 |
1700 |
40 |
45 |
||||||||
JIS 16K Blind Flange Dimensions
|
Pipe |
Pipe |
Bo |
D |
t |
T |
G |
f |
r |
H |
X |
C |
Holes |
Bolt Dia. |
|||||||||
|
inch |
mm |
|||||||||||||||||||||
|
3/8 |
10 |
17.3 |
17.8 |
+0.5 |
90 |
+1.0 |
12 |
+1.0 |
16 |
±1.0 |
48 |
±0.8 |
1 |
4 |
26 |
+1.0 |
28 |
+1.0 |
65 |
±0.5 |
4 |
15 |
|
1/2 |
15 |
21.7 |
22.2 |
95 |
12 |
16 |
52 |
1 |
4 |
30 |
32 |
70 |
4 |
15 |
||||||||
|
3/4 |
20 |
27.2 |
27.7 |
100 |
14 |
20 |
58 |
1 |
4 |
38 |
42 |
75 |
4 |
15 |
||||||||
|
1 |
25 |
34.0 |
34.5 |
125 |
14 |
20 |
70 |
1 |
4 |
46 |
50 |
90 |
4 |
19 |
||||||||
|
1-1/4 |
32 |
42.7 |
43.2 |
135 |
16 |
22 |
80 |
2 |
5 |
56 |
60 |
100 |
4 |
19 |
||||||||
|
1-1/2 |
40 |
48.6 |
49.1 |
140 |
16 |
24 |
85 |
2 |
5 |
62 |
66 |
105 |
4 |
19 |
||||||||
|
2 |
50 |
60.5 |
61.1 |
155 |
16 |
24 |
100 |
2 |
5 |
76 |
80 |
120 |
8 |
19 |
||||||||
|
2-1/2 |
65 |
76.3 |
77.1 |
175 |
18 |
26 |
120 |
2 |
5 |
94 |
98 |
140 |
8 |
19 |
||||||||
|
3 |
80 |
89.1 |
90.0 |
200 |
20 |
28 |
135 |
2 |
6 |
108 |
112 |
160 |
8 |
23 |
||||||||
|
3-1/2 |
90 |
101.6 |
102.6 |
+1.0 |
210 |
20 |
30 |
145 |
2 |
6 |
120 |
124 |
170 |
8 |
23 |
|||||||
|
4 |
100 |
114.3 |
115.4 |
225 |
22 |
+1.5 |
34 |
160 |
2 |
6 |
134 |
138 |
185 |
8 |
23 |
|||||||
|
5 |
125 |
139.8 |
141.2 |
270 |
22 |
34 |
195 |
2 |
6 |
164 |
170 |
225 |
8 |
25 |
||||||||
|
6 |
150 |
165.2 |
166.6 |
305 |
+1.5 |
24 |
38 |
230 |
±0.9 |
2 |
6 |
196 |
202 |
260 |
±0.6 |
12 |
25 |
|||||
|
7 |
175 |
190.7 |
192.1 |
325 |
26 |
40 |
250 |
2 |
6 |
216 |
222 |
+1.5 |
280 |
12 |
25 |
|||||||
|
8 |
200 |
216.3 |
218.0 |
350 |
26 |
40 |
275 |
2 |
6 |
244 |
+1.5 |
252 |
305 |
12 |
25 |
|||||||
|
9 |
225 |
241.8 |
243.7 |
385 |
26 |
40 |
325 |
2 |
6 |
266 |
272 |
335 |
12 |
27 |
||||||||
|
10 |
250 |
267.4 |
269.5 |
430 |
28 |
44 |
345 |
2 |
6 |
304 |
312 |
380 |
12 |
27 |
||||||||
|
12 |
300 |
318.5 |
321.0 |
480 |
30 |
48 |
395 |
3 |
8 |
354 |
364 |
430 |
16 |
27 |
||||||||
|
14 |
350 |
355.6 |
358.1 |
540 |
34 |
52 |
±1.5 |
440 |
3 |
8 |
398 |
408 |
480 |
16 |
33 |
|||||||
|
16 |
400 |
406.4 |
409.0 |
+1.5 |
605 |
+2.0 |
38 |
60 |
495 |
3 |
10 |
446 |
456 |
+2.0 |
540 |
16 |
33 |
|||||
|
18 |
450 |
457.2 |
460.0 |
675 |
40 |
64 |
560 |
3 |
10 |
504 |
+2.0 |
514 |
605 |
±0.8 |
20 |
33 |
||||||
|
20 |
500 |
508.0 |
511.0 |
730 |
42 |
68 |
615 |
3 |
10 |
558 |
568 |
660 |
20 |
33 |
||||||||
|
22 |
550 |
558.8 |
562.0 |
795 |
44 |
70 |
670 |
±1.0 |
3 |
10 |
612 |
622 |
720 |
20 |
39 |
|||||||
|
24 |
600 |
609.6 |
613.0 |
+2.0 |
845 |
46 |
74 |
720 |
3 |
10 |
666 |
+2.5 |
676 |
+2.5 |
770 |
24 |
39 |
|||||
|
26 |
650 |
660.4 |
664.0 |
895 |
48 |
77 |
770 |
5 |
10 |
704 |
726 |
820 |
24 |
39 |
||||||||
|
28 |
700 |
711.2 |
715.0 |
960 |
50 |
80 |
820 |
5 |
10 |
754 |
776 |
875 |
24 |
42 |
||||||||
|
30 |
750 |
762.0 |
766.0 |
1020 |
+2.5 |
52 |
+2.0 |
83 |
880 |
5 |
10 |
806 |
832 |
935 |
24 |
42 |
||||||
|
32 |
800 |
812.8 |
817.0 |
+2.5 |
1085 |
54 |
86 |
930 |
5 |
10 |
865 |
+3.0 |
885 |
+3.0 |
990 |
±1.0 |
24 |
48 |
||||
|
34 |
850 |
863.6 |
868.0 |
1135 |
56 |
89 |
980 |
5 |
10 |
916 |
936 |
1040 |
24 |
48 |
||||||||
|
36 |
900 |
914.4 |
919.0 |
1185 |
58 |
93 |
1030 |
±1.2 |
5 |
10 |
968 |
986 |
1090 |
28 |
48 |
|||||||
|
40 |
1000 |
1016.0 |
1021.0 |
+3.0 |
1320 |
62 |
99 |
1140 |
5 |
12 |
1070 |
+3.5 |
1098 |
+3.5 |
1210 |
28 |
56 |
|||||
|
44 |
1100 |
1117.6 |
1123.0 |
1420 |
66 |
105 |
±2.0 |
1240 |
5 |
12 |
1180 |
1200 |
1310 |
32 |
56 |
|||||||
|
48 |
1200 |
1219.2 |
1225.0 |
1530 |
+3.0 |
70 |
112 |
1350 |
5 |
12 |
1282 |
1302 |
1420 |
±1.5 |
32 |
56 |
||||||
|
52 |
1300 |
1320.8 |
1326.0 |
1645 |
74 |
1450 |
5 |
1530 |
32 |
62 |
||||||||||||
|
54 |
1350 |
1371.6 |
1377.0 |
1700 |
76 |
1510 |
5 |
1590 |
32 |
62 |
||||||||||||
|
56 |
1400 |
1422.4 |
1428.0 |
1755 |
78 |
1560 |
5 |
1640 |
36 |
62 |
||||||||||||
|
60 |
1500 |
1524.0 |
1529.0 |
1865 |
80 |
1670 |
5 |
1750 |
36 |
62 |
||||||||||||
ASME B16.5 Blind flange Tolerances
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter not applicable |
|---|---|
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Outside Diameter of Hub ≤ 12 = + 2.4 mm / - 1.6 mm | ≥ 14 = ± 3.2 mm |
| Diameter of Counterbore not applicable |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Thickness ≤ 18 = + 3.2 mm / - 0 | ≥ 20 = + 4.8 mm / - 0 |
Length thru Hub ≤ 18 = + 3.2 mm / - 0.8 mm | ≥ 20 = + 4.8 mm / - 1.6 mm |