Blind Flanges Dimensions & Weights (ASME B16.5)

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Blind Flanges Dimensions & Weights (ASME B16.5)

ASME B16.5 (Flanges), Blind Flanges, Flange Size & Weigth

The article shows the ASME B16.5 dimensions of Blind Flanges Classes from 150 to 2500 (NPS, ID, OD, Thickness, and bolting details, tolerances) – in millimeters.

ASME BLIND FLANGE DIMENSIONS & WEIGHTS

The article shows the ASME B16.5 dimensions and weights for blind flanges (FF, RF).

blind flange en 1092 type 05 — ASME B15.6 blind flange

BLIND FLANGES SIZES in INCHES

BLIND CLASS 150 (FF, RF)

NPS	OD A	Diameter of Raised Face B	Thickness of Flange C	Number of Bolt Holes NBH	Diameter of Bolt Holes DBH	Bolt Circle Diameter P	Approx Weight (lb) AW
1/2	3 1/2	1 3/8	7/16	4	5/8	2 3/8	2
3/4	3 7/8	1 11/16	1/2	4	5/8	2 3/4	2
1	4 1/4	2	9/16	4	5/8	3 1/8	2
1 1/4	4 5/8	2 1/2	5/8	4	5/8	3 1/2	2
1 1/2	5	2 7/8	11/16	4	5/8	3 7/8	3
2	6	3 5/8	3/4	4	3/4	4 3/4	3
2 1/2	7	4 1/8	7/8	4	3/4	5 1/2	7
3	7 1/2	5	15/16	4	3/4	6	9
3 1/2	8 1/2	5 1/2	15/16	8	3/4	7	13
4	9	6 3/16	15/16	8	3/4	7 1/2	17
5	10	7 5/16	15/16	8	7/8	8 1/2	20
6	11	8 1/2	1	8	7/8	9 1/2	26
8	13 1/2	10 5/8	1 1/8	8	7/8	11 3/4	45
10	16	12 3/4	1 3/16	12	1	14 1/4	70
12	19	15	1 1/4	12	1	17	110
14	21	16 1/4	1 3/8	12	1 1/8	18 3/4	131
16	23 1/2	18 1/2	1 7/16	16	1 1/8	21 1/4	170
18	25	21	1 9/16	16	1 1/4	22 3/4	209
20	27 1/2	23	1 11/16	20	1 1/4	25	272
22	29 1/2	25 1/4	1 13/16	20	1 3/8	27 1/4	333
24	32	27 1/4	1 7/8	20	1 3/8	29 1/2	411

BLIND CLASS 300 (FF, RF)

NPS	OD A	Diameter of Raised Face B	Thickness of Flange C	Number of Bolt Holes NBH	Diameter of Bolt Holes DBH	Bolt Circle Diameter P	Approx Weight (lb) AW
1/2	3 3/4	1 3/8	9/16	4	5/8	2 5/8	2
3/4	4 5/8	1 11/16	5/8	4	3/4	3 1/4	3
1	4 7/8	2	11/16	4	3/4	3 1/2	4
1 1/4	5 1/4	2 1/2	3/4	4	3/4	3 7/8	6
1 1/2	6 1/8	2 7/8	13/16	4	7/8	4 1/2	7
2	6 1/2	3 5/8	7/8	8	3/4	5	8
2 1/2	7 1/2	4 1/8	1	8	7/8	5 7/8	12
3	8 1/4	5	1 1/8	8	7/8	6 5/8	16
3 1/2	9	5 1/2	1 3/16	8	7/8	7 1/4	21
4	10	6 3/16	1 1/4	8	7/8	7 7/8	27
5	11	7 5/16	1 3/8	8	7/8	9 1/4	35
6	12 1/2	8 1/2	1 7/16	12	7/8	10 5/8	50
8	15	10 5/8	1 5/8	12	1	13	81
10	17 1/2	12 3/4	1 7/8	16	1 1/8	15 1/4	127
12	20 1/2	15	2	16	1 1/4	17 3/4	184
14	23	16 1/4	2 1/8	20	1 1/4	20 1/4	235
16	25 1/2	18 1/2	2 1/4	20	1 3/8	22 1/2	307
18	28	21	2 3/8	24	1 3/8	24 3/4	390
20	30 1/2	23	2 1/2	24	1 3/8	27	492
22	33	25 1/4	2 5/8	24	1 5/8	29 1/4	594
24	36	27 1/4	2 3/4	24	1 5/8	32	754

BLIND CLASS 400 (FF, RF)

NPS	OD A	Diameter of Raised Face B	Thickness of Flange C	Number of Bolt Holes NBH	Diameter of Bolt Holes DBH	Bolt Circle Diameter P	Approx Weight (lb) AW
1/2	3 3/4	1 3/8	9/16	4	5/8	2 5/8	2
3/4	4 5/8	1 11/16	5/8	4	3/4	3 1/4	3
1	4 7/8	2	11/16	4	3/4	3 1/2	4
1 1/4	5 1/4	2 1/2	13/16	4	3/4	3 7/8	6
1 1/2	6 1/8	2 7/8	7/8	4	7/8	4 1/2	8
2	6 1/2	3 5/8	1	8	3/4	5	10
2 1/2	7 1/2	4 1/8	1 1/8	8	7/8	5 7/8	15
3	8 1/4	5	1 1/4	8	7/8	6 5/8	20
3 1/2	9	5 1/2	1 3/8	8	1	7 1/4	29
4	10	6 3/16	1 3/8	8	1	7 7/8	33
5	11	7 5/16	1 1/2	8	1	9 1/4	44
6	12 1/2	8 1/2	1 5/8	12	1	10 5/8	61
8	15	10 5/8	1 7/8	12	1 1/8	13	100
10	17 1/2	12 3/4	2 1/8	16	1 1/4	15 1/4	155
12	20 1/2	15	2 1/4	16	1 3/8	17 3/4	226
14	23	16 1/4	2 3/8	20	1 3/8	20 1/4	310
16	25 1/2	18 1/2	2 1/2	20	1 1/2	22 1/2	398
18	28	21	2 5/8	24	1 1/2	24 3/4	502
20	30 1/2	23	2 3/4	24	1 5/8	27	621
22	33	25 1/4	2 7/8	24	1 3/4	29 1/4	685
24	36	27 1/4	3	24	1 7/8	32	936

BLIND CLASS 600 (FF, RF)

NPS	OD A	Diameter of Raised Face B	Thickness of Flange C	Number of Bolt Holes NBH	Diameter of Bolt Holes DBH	Bolt Circle Diameter P	Approx. Weight (lb) AW
1/2	3 3/4	1 3/8	9/16	4	5/8	2 5/8	3
3/4	4 5/8	1 11/16	5/8	4	3/4	3 1/4	4
1	4 7/8	2	11/16	4	3/4	3 1/2	4
1 1/4	5 1/4	2 1/2	13/16	4	3/4	3 7/8	6
1 1/2	6 1/8	2 7/8	7/8	4	7/8	4 1/2	8
2	6 1/2	3 5/8	1	8	3/4	5	10
2 1/2	7 1/2	4 1/8	1 1/8	8	7/8	5 7/8	15
3	8 1/4	5	1 1/4	8	7/8	6 5/8	20
3 1/2	9	5 1/2	1 3/8	8	1	7 1/4	29
4	10 3/4	6 3/16	1 1/2	8	1	8 1/2	41
5	13	7 5/16	1 3/4	8	1 1/8	10 1/2	68
6	14	8 1/2	1 7/8	12	1 1/8	11 1/2	86
8	16 1/2	10 5/8	2 3/16	12	1 1/4	13 3/4	140
10	20	12 3/4	2 1/2	16	1 3/8	17	321
12	22	15	2 5/8	20	1 3/8	19 1/4	295
14	23 3/4	16 1/4	2 3/4	20	1 1/2	20 3/4	378
16	27	18 1/2	3	20	1 5/8	23 3/4	527
18	29 1/4	21	3 1/4	20	1 3/4	25 3/4	665
20	32	23	3 1/2	24	1 3/4	28 1/2	855
22	34 1/4	25 1/4	3 3/4	24	1 7/8	30 5/8	1000
24	37	27 1/4	4	24	2	33	1250

BLIND CLASS 900 (FF, RF)

NPS	OD A	Diameter of Raised Face B	Thickness of Flange C	Number of Bolt Holes NBH	Diameter of Bolt Holes DBH	Bolt Circle Diameter P	Approx. Weight (lb) AW
1/2	4 3/4	1 3/8	7/8	4	7/8	3 1/4	4
3/4	5 1/8	1 11/16	1	4	7/8	3 1/2	6
1	5 7/8	2	1 1/8	4	1	4	9
1 1/4	6 1/4	2 1/2	1 1/8	4	1	4 3/8	10
1 1/2	7	2 7/8	1 1/4	4	1 1/8	4 7/8	14
2	8 1/2	3 5/8	1 1/2	8	1	6 1/2	25
2 1/2	9 5/8	4 1/8	1 5/8	8	1 1/8	7 1/2	32
3	9 1/2	5	1 1/2	8	1	7 1/2	35
3 1/2	–	–	–	–	–	–	–
4	11 1/2	6 3/16	1 3/4	8	1 1/4	9 1/4	54
5	13 3/4	7 5/16	2	8	1 3/8	11	87
6	15	8 1/2	2 3/16	12	1 1/4	12 1/2	115
8	18 1/2	10 5/8	2 1/2	12	1 1/2	15 1/2	200
10	21 1/2	12 3/4	2 3/4	16	1 1/2	18 1/2	290
12	24	15	3 1/8	20	1 1/2	21	415
14	25 1/4	16 1/4	3 3/8	20	1 5/8	22	520
16	27 3/4	18 1/2	3 1/2	20	1 3/4	24 1/4	619
18	31	21	4	20	2	27	880
20	33 3/4	23	4 1/4	20	2 1/8	29 1/2	1107
22	–	–	–	–	–	–	–
24	41	27 1/4	5 1/2	20	2 5/8	35 1/2	2099

BLIND CLASS 1500 (FF, RF)

NPS	OD A	Diameter of Raised Face B	Thickness of Flange C	Number of Bolt Holes NBH	Diameter of Bolt Holes DBH	Bolt Circle Diameter P	Approx Weight (lb) AW
1/2	4 3/4	1 3/8	7/8	4	7/8	3 1/4	4
3/4	5 1/8	1 11/16	1	4	7/8	3 1/2	6
1	5 7/8	2	1 1/8	4	1	4	9
1 1/4	6 1/4	2 1/2	1 1/8	4	1	4 3/8	10
1 1/2	7	2 7/8	1 1/4	4	1 1/8	4 7/8	14
2	8 1/2	3 5/8	1 1/2	8	1	6 1/2	25
2 1/2	9 5/8	4 1/8	1 5/8	8	1 1/8	7 1/2	35
3	10 1/2	5	1 7/8	8	1 1/4	8	48
3 1/2	–	–	–	–	–	–	–
4	12 1/4	6 3/16	2 1/8	8	1 3/8	9 1/2	73
5	14 3/4	7 5/16	2 7/8	8	1 5/8	11 1/2	142
6	15 1/2	8 1/2	3 1/4	12	1 1/2	12 1/2	159
8	19	10 5/8	3 5/8	12	1 3/4	15 1/2	302
10	23	12 3/4	4 1/4	12	2	19	507
12	26 1/2	15	4 7/8	16	2 1/8	22 1/2	775
14	29 1/2	16 1/4	5 1/4	16	2 3/8	25	975
16	32 1/2	18 1/2	5 3/4	16	2 5/8	27 3/4	1300
18	36	21	6 3/8	16	2 7/8	30 1/2	1750
20	38 3/4	23	7	16	3 1/8	32 3/4	2225
22	–	–	–	–	–	–	–
24	46	27 1/4	8	16	3 5/8	39	3625

BLIND CLASS 2500 (FF, RF)

NPS	OD A	Diameter of Raised Face B	Thickness of Flange C	Number of Bolt Holes NBH	Diameter of Bolt Holes DBH	Bolt Circle Diameter P	Approx Weight (lb) AW
1/2	5 1/4	1 3/8	1 3/16	4	7/8	3 1/2	7
3/4	5 1/2	1 11/16	1 1/4	4	7/8	3 3/4	10
1	6 1/4	2	1 3/8	4	1	4 1/4	12
1 1/4	7 1/4	2 1/2	1 1/2	4	1 1/8	5 1/8	18
1 1/2	8	2 7/8	1 3/4	4	1 1/4	5 3/4	25
2	9 1/4	3 5/8	2	8	1 1/8	6 3/4	39
2 1/2	10 1/2	4 1/8	2 1/4	8	1 1/4	7 3/4	56
3	12	5	2 5/8	8	1 3/8	9	86
3 1/2	–	–	–	–	–	–	–
4	14	6 3/16	3	8	1 5/8	10 3/4	133
5	16 1/2	7 5/16	3 5/8	8	1 7/8	12 3/4	223
6	19	8 1/2	4 1/4	8	2 1/8	14 1/2	345
8	21 3/4	10 5/8	5	12	2 1/8	17 1/4	533
10	26 1/2	12 3/4	6 1/2	12	2 5/8	21 1/4	1025
12	30	15	7 1/4	12	2 7/8	24 3/8	1464

BLIND FLANGES SIZES in MILLIMETERS

BLIND CLASS 150 (FF, RF)

NPS	DN	OD	Thk	RF Diam.	RF Height	PCD	Bolts #	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	Metric Stud	Weight in kg
		A	B	C	D	E
1/2	15	90	9.6	34.9	2	60.3	4	1/2	50	55	5/8	M14	0.9
3/4	20	100	11.2	42.9	2	69.9	4	1/2	50	65	5/8	M14	0.9
1	25	110	12.7	50.8	2	79.4	4	1/2	55	65	5/8	M14	0.9
1 1/4	32	115	14.3	63.5	2	88.9	4	1/2	55	70	5/8	M14	1.4
1 1/2	40	125	15.9	73	2	98.4	4	1/2	65	70	5/8	M14	1.8
2	50	150	17.5	92.1	2	120.7	4	5/8	70	85	3/4	M16	2.3
2 1/2	65	180	20.7	104.8	2	139.7	4	5/8	75	90	3/4	M16	3.2
3	80	190	22.3	127	2	152.4	4	5/8	75	90	3/4	M16	4.1
3 1/2	90	215	22.3	139.7	2	177.8	8	5/8	75	90	3/4	M16	5.9
4	100	230	22.3	157.2	2	190.5	8	5/8	75	90	3/4	M16	7.7
5	125	255	22.3	185.7	2	215.9	8	3/4	85	95	7/8	M20	9.1
6	150	280	23.9	215.9	2	241.3	8	3/4	85	100	7/8	M20	11.8
8	200	345	27	269.9	2	298.5	8	3/4	90	110	7/8	M20	20.5
10	250	405	28.6	323.8	2	362	12	7/8	100	115	1	M24	32
12	300	485	30.2	381	2	431.8	12	7/8	100	120	1	M24	50
14	350	535	33.4	412.8	2	476.3	12	1	115	135	1 1/8	M27	64
16	400	595	35	469.9	2	539.8	16	1	115	135	1 1/8	M27	82
18	450	635	38.1	533.4	2	577.9	16	1 1/8	125	145	1 1/4	M30	100
20	500	700	41.3	584.2	2	635	20	1 1/8	140	160	1 1/4	M30	130
24	600	815	46.1	692.2	2	749.3	20	1 1/4	150	170	1 3/8	M33	196

BLIND CLASS 300 (FF, RF)

NPS	DN	OD	Thk	RF Diam.	RF Height	PCD	Bolts #	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	Metric Stud	Weight in kg
		A	B	C	D	E
1/2	15	95	12.7	34.9	2	66.7	4	1/2	55	65	5/8	M14	1.4
3/4	20	115	14.3	42.9	2	82.6	4	5/8	65	75	3/4	M16	1.4
1	25	125	15.9	50.8	2	88.9	4	5/8	65	75	3/4	M16	1.4
1 1/4	32	135	17.5	63.5	2	98.4	4	5/8	70	85	3/4	M16	1.8
1 1/2	40	155	19.1	73	2	114.3	4	3/4	75	90	7/8	M20	2.7
2	50	165	20.7	92.1	2	127	8	5/8	75	90	3/4	M16	3.7
2 1/2	65	190	23.9	104.8	2	149.2	8	3/4	85	100	7/8	M20	5.5
3	80	210	27	127	2	168.3	8	3/4	90	110	7/8	M20	7.3
3 1/2	90	230	28.6	139.7	2	184.2	8	3/4	95	110	7/8	M20	9.6
4	100	255	30.2	157.2	2	200	8	3/4	95	115	7/8	M20	12.3
5	125	280	33.4	185.7	2	235	8	3/4	110	120	7/8	M20	15.9
6	150	320	35	215.9	2	269.9	12	3/4	110	120	7/8	M20	22.7
8	200	380	39.7	269.9	2	330.2	12	7/8	120	140	1	M24	36
10	250	445	46.1	323.8	2	387.4	16	1	140	160	1 1/8	M27	57
12	300	520	49.3	381	2	450.8	16	1 1/8	145	170	1 1/4	M30	84
14	350	585	52.4	412.8	2	514.4	20	1 1/8	160	180	1 1/4	M30	113
16	400	650	55.6	469.9	2	571.5	20	1 1/4	165	190	1 3/8	M33	134
18	450	710	58.8	533.4	2	628.6	24	1 1/4	170	195	1 3/8	M33	181
20	500	775	62	584.2	2	685.8	24	1 1/4	185	205	1 3/8	M33	230
24	600	915	68.3	692.2	2	812.8	24	1 1/2	205	230	1 5/8	M39

BLIND CLASS 400 (FF, RF)

NPS	DN	OD	Thk	RF Diam.	RF Height	PCD	Bolts #	Bolt Size UNC	RF Stud Length	Hole Size	Metric Stud	Weight in kg
		A	B	C	D	E
1/2	15	95	14.3	34.9	7	66.7	4	1/2	75	5/8	M14	1.5
3/4	20	115	15.9	42.9	7	82.6	4	5/8	90	3/4	M16	1.5
1	25	125	17.5	50.8	7	88.9	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	20.7	63.5	7	98.4	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	22.3	73	7	114.3	4	3/4	110	7/8	M20	3.7
2	50	165	25.4	92.1	7	127	8	5/8	110	3/4	M16	4.6
2 1/2	65	190	28.6	104.8	7	149.2	8	3/4	120	7/8	M20	6.8
3	80	210	31.8	127	7	168.3	8	3/4	125	7/8	M20	9.1
3 1/2	90	230	35	N/A	7	184.2	8	7/8	140	1	M24	13.2
4	100	255	35	157.2	7	200	8	7/8	140	1	M24	15
5	125	280	38.1	185.7	7	235	8	7/8	145	1	M24	20
6	150	320	41.3	215.9	7	269.9	12	7/8	150	1	M24	28
8	200	380	47.7	269.9	7	330	12	1	170	1 1/8	M27	46
10	250	445	54	323.8	7	387.4	16	1 1/8	190	1 1/4	M30	71
12	300	520	57.2	381	7	450.8	16	1 1/4	205	1 3/8	M33	102
14	350	585	60.4	412.8	7	514.4	20	1 1/4	210	1 3/8	M33	132
16	400	650	63.5	469.9	7	571.5	20	1 3/8	220	1 1/2	M36	168
18	450	710	66.7	533.4	7	628.6	24	1 3/8	230	1 1/2	M36	207
20	500	775	69.9	584.2	7	685.8	24	1 1/2	240	1 3/4	M39	266
24	600	915	76.2	692.2	7	812.8	24	1 3/4	265	1 7/8	M45	405

BLIND CLASS 400 (FF, RF)

NPS	DN	OD	Thk	RF Diam.	RF Height	PCD	Bolts #	Bolt Size UNC	RF Stud Length	Hole Size	Metric Stud	Weight in kg
		A	B	C	D	E
1/2	15	95	14.3	34.9	7	66.7	4	1/2	75	5/8	M14	1.4
3/4	20	115	15.9	42.9	7	82.6	4	5/8	90	3/4	M16	1.4
1	25	125	17.5	50.8	7	88.9	4	5/8	90	3/4	M16	1.8
1 1/4	32	135	20.7	63.5	7	98.4	4	5/8	95	3/4	M16	2.3
1 1/2	40	155	22.3	73	7	114.3	4	3/4	110	7/8	M20	3.7
2	50	165	25.4	92.1	7	127	8	5/8	110	3/4	M16	4.6
2 1/2	65	190	28.6	104.8	7	149.2	8	3/4	120	7/8	M20	6.8
3	80	210	31.8	127	7	168.3	8	3/4	125	7/8	M20	9.1
3 1/2	90	230	35	N/A	7	184.2	8	7/8	140	1	M24	13.2
4	100	275	38.1	157.2	7	215.9	8	7/8	145	1	M24	18.7
5	125	330	44.5	185.7	7	266.7	8	1	165	1 1/8	M27	31
6	150	355	47.7	215.9	7	292.1	12	1	170	1 1/8	M27	39
8	200	420	55.6	269.9	7	349.2	12	1 1/8	190	1 1/4	M30	64
10	250	510	63.5	323.8	7	431.8	16	1 1/4	215	1 3/8	M33	105
12	300	560	66.7	381	7	489	20	1 1/4	220	1 3/8	M33	134
14	350	605	69.9	412.8	7	527	20	1 3/8	235	1 1/2	M36	161
16	400	685	76.2	469.9	7	603.2	20	1 1/2	255	1 5/8	M39	225
18	450	745	82.6	533.4	7	654	20	1 5/8	275	1 3/4	M42	286
20	500	815	88.9	584.2	7	723.9	24	1 5/8	285	1 3/4	M42	368
24	600	940	101.6	692.2	7	838.2	24	1 7/8	330	2	M48	568

BLIND CLASS 900 (FF, RF)

NPS	DN	OD	Thk	RF Diam.	RF Height	PCD	Bolts #	Bolt Size UNC	RF Stud Length	Hole Size	Metric Stud	Weight in kg
		A	B	C	D	E
1/2	15	120	22.3	34.9	7	82.6	4	3/4	110	7/8	M20	1.8
3/4	20	130	25.4	42.9	7	88.9	4	3/4	115	7/8	M20	2.7
1	25	150	28.6	50.8	7	101.6	4	7/8	125	1	M24	3.6
1 1/4	32	160	28.6	63.5	7	111.1	4	7/8	125	1	M24	4.1
1 1/2	40	180	31.8	73	7	123.8	4	1	140	1 1/8	M27	5.9
2	50	215	38.1	92.1	7	165.1	8	7/8	145	1	M24	10.1
2 1/2	65	245	41.3	104.8	7	190.5	8	1	160	1 1/8	M27	16
3	80	240	38.1	127	7	190.5	8	7/8	145	1	M24	13
4	100	290	44.5	157.2	7	235	8	1 1/8	170	1 1/4	M30	24.5
5	125	350	50.8	185.7	7	279.4	8	1 1/4	190	1 3/8	M33	39.5
6	150	380	55.6	215.9	7	317.5	12	1 1/8	190	1 1/4	M30	53
8	200	470	63.5	269.9	7	393.7	12	1 3/8	220	1 1/2	M36	91
10	250	545	69.9	323.8	7	469.9	16	1 3/8	235	1 1/2	M36	132
12	300	610	79.4	381	7	533.4	20	1 3/8	255	1 1/2	M36	189
14	350	640	85.8	412.8	7	558.8	20	1 1/2	275	1 5/8	M39	237
16	400	705	88.9	469.9	7	616	20	1 5/8	285	1 3/4	M42	273
18	450	785	101.6	533.4	7	685.8	20	1 7/8	325	2	M48	367
20	500	855	108	584.2	7	749.3	20	2	350	2 1/8	M52	463
24	600	1040	139.7	692.2	7	901.7	20	2 1/2	440	2 5/8	M64	875

BLIND CLASS 1500 (FF, RF)

NPS	DN	OD	Thk	RF Diam.	RF Height	PCD	Bolts #	Bolt Size UNC	RF Stud Length	Hole Size	Metric Stud	Weight in kg
		A	B	C	D	E
1/2	15	120	22.3	34.9	7	82.6	4	3/4	110	7/8	M20	1.8
3/4	20	130	25.4	42.9	7	88.9	4	3/4	115	7/8	M20	2.7
1	25	150	28.6	50.8	7	101.6	4	7/8	125	1	M24	3.7
1 1/4	32	160	28.6	63.5	7	111.1	4	7/8	125	1	M24	4.1
1 1/2	40	180	31.8	73	7	123.8	4	1	140	1 1/8	M27	5.9
2	50	215	38.1	92.1	7	165.1	8	7/8	145	1	M24	10.1
2 1/2	65	245	41.3	104.8	7	190.5	8	1	160	1 1/8	M27	15.9
3	80	265	47.7	127	7	203.2	8	1 1/8	180	1 1/4	M30	21.8
4	100	310	54	157.2	7	241.3	8	1 1/4	195	1 3/8	M33	33
5	125	375	73.1	185.7	7	292.1	8	1 1/2	250	1 5/8	M39	64
6	150	395	82.6	215.9	7	317.5	12	1 3/8	260	1 1/2	M36	75
8	200	485	92.1	269.9	7	393.7	12	1 5/8	290	1 3/4	M42	136
10	250	585	108	323.8	7	482.6	12	1 7/8	335	2	M48	232
12	300	675	123.9	381	7	571.5	16	2	375	2 1/8	M52	314
14	350	750	133.4	412.8	7	635	16	2 1/4	405	2 3/8	M56	443
16	400	825	146.1	469.9	7	704.8	16	2 1/2	445	2 5/8	M64	591
18	450	915	162	533.4	7	774.7	16	2 3/4	495	2 7/8	M72	795
20	500	985	177.8	584.2	7	831.8	16	3	540	3 1/8	M76	1022
24	600	1170	203.2	692.2	7	990.6	16	3 1/2	615	3 5/8	M90	1648

BLIND CLASS 2500 (FF, RF)

NPS	DB	OD	Thk	RF Diam.	RF Height	PCD	Bolts #	Bolt Size UNC	RF Stud Length	Hole Size	Metric Stud	Weight in kg
		A	B	C	D	E
1/2	15	135	30.2	34.9	7	88.9	4	3/4	120	7/8	M20	3.2
3/4	20	140	31.8	42.9	7	95.2	4	3/4	125	7/8	M20	3.7
1	25	160	35	50.8	7	108	4	7/8	140	1	M24	5
1 1/4	32	185	38.1	63.5	7	130.2	4	1	150	1 1/8	M27	7.8
1 1/2	40	205	44.5	73	7	146	4	1 1/8	170	1 1/4	M30	10.5
2	50	235	50.9	92.1	7	171.4	8	1	180	1 1/8	M27	18
2 1/2	65	265	57.2	104.8	7	196.8	8	1 1/8	195	1 1/4	M30	25.5
3	80	305	66.7	127	7	228.6	8	1 1/4	220	1 3/8	M33	39
4	100	355	76.2	157.2	7	273	8	1 1/2	255	1 5/8	M39	61.5
5	125	420	92.1	185.7	7	323.8	8	1 3/4	300	1 7/8	M45	102
6	150	485	108	215.9	7	368.3	8	2	345	2 1/8	M52	157
8	200	550	127	269.9	7	438.2	12	2	380	2 1/8	M52	241
10	250	675	165.1	323.8	7	539.8	12	2 1/2	490	2 5/8	M64	470
12	300	760	184.2	381	7	619.1	12	2 3/4	540	2 7/8	M72	575

DIMENSIONAL TOLERANCE BLIND FLANGE

BLIND FLANGE DIMENSIONAL TOLERANCE ASME B16.5 (INCHES)
Dimension	Flange	Tolerance
A	Outside Diameter	When O.D. is 24″ or less: ±1/16″ (1.6mm) When O.D. is over 24″: ±1/8″ (3.2mm)
D	Inside Diameter	Threaded: within limits of boring gauge Lap Joint, Slip-on, Socket 10″ and smaller: ±1/32″ (0.8mm), 0″ 12″ and larger: -1/16″ (1.6mm), 0″
B	Diameter of contact face	1/16″ raised face: ±1/32″ (0.8mm) 1/4″ Raised Face, Tongue & Groove (male & female): ±1/64″ (0.4mm)
E, F, S	Diameter of bore	Threaded (S): within limits of boring gauge Lap Joint (F), Slip-on (E), Socket (E) 10″ and smaller: ±1/32″ (0.8mm), 0″ 12″ and larger: -1/16″ (1.6mm), 0″
P	Drilling	Bolt circle: ±1/16″ (1.6mm) Bolt hole spacing: ±1/32″ (0.8mm) Eccentricity of bolt circle for facing 2 1/2″ and smaller ±1/32″ (0.8mm) max. 3″ and larger ±1/16″ (1.6mm) max.
C	Thickness	18″ and smaller: ±1/8″ (3.2mm), -0″ 20″ and larger: ±3/16″ (4.8mm), -0″
L, M	Length of hub	18″ and smaller: ±1/8″ (3.2mm), ±1/32″ (0.8mm) 20″ and larger: ±3/16″ (4.8mm), ±1/16″ (1.6mm)

BLIND FLANGE WEIGHTS

BLIND FLANGE WEIGHT IN KGS.

The table shows the ASME B16.5 blind flange weights in Kgs. by Flange NPS and Class (carbon/alloy steel materials; for higher grades, consider adjusting weight using the delta-specific weight carbon/other grades)

NPS	Class 150	Class 300	Class 400	Class 600	Class 900	Class 1500	Class 2500
1/2	0.9	0.9	0.9	1.4	1.8	1.8	3.6
3/4	0.9	1.4	1.4	1.8	2.7	2.7	4.1
1	0.9	1.8	1.8	1.8	4.1	4.1	5.9
1¼	1.4	2.7	2.7	2.7	4.5	4.5	9
1½	1.8	3.2	3.6	3.6	6.3	6.3	12.6
2	2.3	3.6	4.5	4.5	11.3	11.3	18.9
2½	3.2	5.4	6.8	6.8	14.4	15.8	23.4
3	4.1	7.2	9	9	15.8	21.6	42.3
3½	5.9	9.5	13	13
4	7.7	12.6	14.9	18.5	24.3	32.9	65.7
5	9	16.7	19.8	30.6	39.2	63	109.8
6	12.2	22.5	27.5	38.7	51.8	72	170.1
8	21.2	36.5	45	63	90	135.9	259.2
10	31.5	55.8	69.8	103	130.5	229.5	480.6
12	55.4	83.3	101.7	132.8	186.8	348.8	723.6
14	63	112.5	139.5	170.1	234	438.8
16	81	141.8	179.1	237.2	278.6	585
18	99	186.3	225.9	299.3	396	787.5
20	128.3	231.8	279.5	384.8	498.2	1001
22	159.8	288	324	450
24	193.5	360	421.2	562.5	944.6	1631

BLIND FLANGE WEIGHT IN LBS.

The table shows the ASME B16.5 blind flange weights in Lbs. by Flange NPS and Class (carbon/alloy steel materials; for higher grades, consider adjusting weight using the delta-specific weight carbon/other grades)

CLASS 150	Nominal Pipe Size	Blind Flange Weight in Lbs./unit
	½	2
	¾	2
	1	2
	1¼	3
	1½	4
	2	5
	2½	7
	3	9
	3½	13
	4	17
	5	20
	6	27
	8	47
	10	70
	12	123
	14	140
	16	180
	18	220
	20	285
	22	355
	24	430
CLASS 300	Nominal Pipe Size	Blind Flange Weight in Lbs./unit
	½	2
	¾	3
	1	4
	1¼	6
	1½	7
	2	8
	2½	12
	3	16
	3½	21
	4	28
	5	37
	6	50
	8	81
	10	124
	12	185
	14	250
	16	315
	18	414
	20	515
	22	640
	24	800
CLASS 400	Nominal Pipe Size	Blind Flange Weight in Lbs./unit
	½	2
	¾	3
	1	4
	1¼	6
	1½	8
	2	10
	2½	15
	3	20
	3½	29
	4	33
	5	44
	6	61
	8	100
	10	155
	12	226
	14	310
	16	398
	18	502
	20	621
	22	720
	24	936
CLASS 600	Nominal Pipe Size	Blind Flange Weight in Lbs./unit
	½	3
	¾	4
	1	4
	1¼	6
	1½	8
	2	10
	2½	15
	3	20
	3½	29
	4	41
	5	68
	6	86
	8	140
	10	231
	12	295
	14	378
	16	527
	18	665
	20	855
	22	1000
	24	1250
CLASS 900	Nominal Pipe Size	Blind Flange Weight in Lbs./unit
	½	4
	¾	6
	1	9
	1¼	10
	1½	14
	2	25
	2½	32
	3	35
	4	54
	5	87
	6	115
	8	200
	10	290
	12	415
	14	520
	16	619
	18	880
	20	1107
	24	2099
CLASS 1500	Nominal Pipe Size	Blind Flange Weight in Lbs./unit
	½	4
	¾	6
	1	9
	1¼	10
	1½	14
	2	25
	2½	35
	3	48
	4	73
	5	140
	6	160
	8	302
	10	510
	12	775
	14	975
	16	1300
	18	1750
	20	2225
	24	3625
CLASS 2500	Nominal Pipe Size	Blind Flange Weight in Lbs./unit
	½	7
	¾	10
	1	12
	1¼	18
	1½	25
	2	39
	2½	56
	3	86
	4	133
	5	223
	6	345
	8	533
	10	1025
	12	1464

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Projectmaterials Team

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Blind Flanges Dimensions & Weights (ASME B16.5)

Blind Flanges Dimensions & Weights (ASME B16.5)

ASME BLIND FLANGE DIMENSIONS & WEIGHTS

BLIND FLANGES SIZES in INCHES

BLIND CLASS 150 (FF, RF)

BLIND CLASS 300 (FF, RF)

BLIND CLASS 400 (FF, RF)

BLIND CLASS 600 (FF, RF)

BLIND CLASS 900 (FF, RF)

BLIND CLASS 1500 (FF, RF)

BLIND CLASS 2500 (FF, RF)

BLIND FLANGES SIZES in MILLIMETERS

BLIND CLASS 150 (FF, RF)

BLIND CLASS 300 (FF, RF)

BLIND CLASS 400 (FF, RF)

BLIND CLASS 400 (FF, RF)

BLIND CLASS 900 (FF, RF)

BLIND CLASS 1500 (FF, RF)

BLIND CLASS 2500 (FF, RF)

DIMENSIONAL TOLERANCE BLIND FLANGE

BLIND FLANGE WEIGHTS

BLIND FLANGE WEIGHT IN KGS.

BLIND FLANGE WEIGHT IN LBS.

Projectmaterials Team

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