ASME B16.5 Forged Flanges Weight Chart

Weights in kilograms approximately given

Weld Neck flange
Class 150
NPS	Slip On	Thd	Socket Weld	Lap Joint	Blind	Weld Neck
1/2	0.5	0.5	0.9	0.5	0.9	0.9
3/4	0.9	0.9	0.9	0.9	0.9	0.9
1	0.9	0.9	0.9	0.9	0.9	1.4
1¼	1.4	1.4	1.4	1.4	1.4	1.4
1½	1.4	1.4	1.4	1.4	1.8	1.8
2	2.3	2.3	2.3	2.3	2.3	2.7
2½	3.6	3.6	3.6	3.6	3.2	4.5
3	4.1	4.1	4.1	4.1	4.1	5.2
3½	4	5.4	4	4	5.9	5.4
4	5.9	5.9	5.9	5.9	7.7	7.4
5	6.8	6.8	6.8	6.8	9	9.5
6	8.6	8.6	8.6	8.6	12.2	11.7
8	13.5	13.5	13.5	13.5	21.2	18.9
10	19.4	19.4	19.4	19.4	31.5	24.3
12	28.8	28.8	28.8	28.8	55.4	39.6
14	40.5	40.5	40.5	47.3	63	51.3
16	47.7	44.1	44.1	63	81	63
18	58.5	58.5	58.5	72	99	74.3
20	74.3	74.3	74.3	87.8	128.3	88.7
22	83.3	83.3	83.3	110.3	159.8	101.3
24	99	99	99	123.8	193.5	120.6
Slip On flange
Class 300
NPS	Slip On	Thd	Socket Weld	Lap Joint	Blind	Weld Neck
1/2	0.9	0.9	1.4	0.9	0.9	0.9
3/4	1.4	1.4	1.4	1.4	1.4	1.4
1	1.4	1.4	1.4	1.4	1.8	1.8
1¼	2	2	1.8	2.1	2.7	2.3
1½	2.9	2.9	2.7	2.9	3.2	3.2
2	3.2	3.2	3.2	3.2	3.6	4.1
2½	4.5	4.5	4.5	4.5	5.4	5.4
3	5.9	6.3	5.9	6.5	7.2	8.1
3½	7.7	7.7	7.7	7.7	9.5	9
4	10.6	10.8	9.9	10.8	12.6	11.9
5	13.0	13.9	12.6	12.6	16.7	16.2
6	17.6	17.6	17.6	17.6	22.5	20.3
8	26.1	26.1	26.1	26.1	36.5	31.1
10	36.5	36.5	36.5	40	55.8	45
12	51.8	51.8	51.8	63	83.3	63.9
14	74.3	74.3	74.3	85.5	112.5	92.7
16	94.5	99	85.5	105.3	141.8	112.5
18	113.9	126	112.5	137.3	186.3	144
20	141.8	146.3	141.8	168.8	231.8	180
22	166.5	166.5	166.5	195.8	288	209.3
24	220.5	220.5	213.8	247.5	360	261
Socket Weld flange
Class 400
NPS	Slip On	Thd	Socket Weld	Lap Joint	Blind	Weld Neck
1/2	0.9	0.9	0.9	0.9	0.9	1.4
3/4	1.4	1.4	1.4	1.4	1.4	1.6
1	1.6	1.6	1.6	1.6	1.8	1.8
1¼	2	2	2	2	2.7	2
1½	2.9	2.9	2.9	2.9	3.6	3.6
2	3.6	3.6	3.6	3.6	4.5	4.5
2½	5.4	5.4	5.4	4	6.8	6.3
3	6.8	6.8	6.8	6.3	9	8.1
3½	9.5	9.5	9.5	9	13	11.7
4	11.7	11.7	11.7	11.3	14.9	15.8
5	13.9	13.9	13.9	13.0	19.8	19.4
6	19.8	19.8	19.8	18.9	27.5	25.7
8	30.2	30.2	30.2	28.8	45	40.1
10	40	40	40	49.5	69.8	56.3
12	58.5	58.5	58.5	68.4	101.7	78.8
14	85	85	85	94.5	139.5	104.9
16	113.9	113.9	113.9	126	179.1	132.8
18	139.5	139.5	139.5	155.3	225.9	162
20	170.1	170.1	170.1	189	279.5	200.3
22	182.3	182.3	182.3	204.8	324	227.3
24	242.6	242.6	242.6	276.8	421.2	288
Lap Joint flange
Class 600
NPS	Slip On	Thd	Socket Weld	Lap Joint	Blind	Weld Neck
1/2	0.9	0.9	0.9	0.9	1.4	1.4
3/4	1.4	1.4	1.4	1.4	1.8	1.8
1	1.8	1.8	1.8	1.8	1.8	1.8
1¼	2.3	2.3	2.3	2.3	2.7	2.7
1½	3.2	3.2	3.2	3.2	3.6	3.6
2	4.1	4.1	4.1	4.1	4.5	5.4
2½	5.9	5.9	5.9	5.4	6.8	8.1
3	7.2	7.2	7.2	6.8	9	10.4
3½	9.5	9.5	9.5	9	13	11.7
4	16.7	16.7	16.7	16.2	18.5	18.9
5	28.4	28.4	28.4	28.4	30.6	30.6
6	36	36	36	35.1	38.7	36.5
8	51.8	51.8	51.8	50.4	63	54
10	79.7	79.7	79.7	87.8	103	85.5
12	96.8	96.8	96.8	108	132.8	101.7
14	116.6	116.6	116.6	130.5	170.1	156.2
16	164.7	164.7	164.7	180	237.2	216.5
18	214.2	214.2	214.2	211.1	299.3	249.8
20	275.4	275.4	275.4	271.8	384.8	310.5
22	265.5	265.5	265.5	301.5	450	324
24	394.2	394.2	394.2	389.7	562.5	439.7
Threaded flange
Class 900
NPS	Slip On	Thd	Socket Weld	Lap Joint	Blind	Weld Neck
1/2	2.7	2.7	2.7	2.7	1.8	3.2
3/4	2.7	2.7	2.7	2.7	2.7	3.2
1	3.4	3.4	3.4	3.4	4.1	3.8
1¼	4.5	4.5	4.5	4.5	4.5	4.5
1½	6.3	6.3	6.3	6.3	6.3	6.3
2	9.9	9.9	9.9	9.5	11.3	10.8
2½	13.9	13.9	13.9	11.3	14.4	13.9
3	16.2	16.2	16.2	13.0	15.8	16.2
4	23.9	23.9	23.9	22	24.3	23.9
5	37.4	37.4	37.4	36.5	39.2	38.7
6	49.5	49.5	49.5	47.3	51.8	49.5
8	77.4	77.4	77.4	85.5	90	84.2
10	110.3	110.3	110.3	124.7	130.5	120.6
12	146.7	146.7	146.7	166	186.8	167.4
14	180	180	180	186.8	234	252.9
16	206.6	206.6	206.6	219.6	278.6	308.3
18	291.2	291.2	291.2	301.5	396	415.8
20	356.4	356.4	356.4	390.6	498.2	523.8
24	666	666	666	746.6	944.6	948.2
Blind flange
Class 1500
NPS	Slip On	Thd	Socket Weld	Lap Joint	Blind	Weld Neck
1/2	2.7	2.7	2.7	2.7	1.8	3.2
3/4	2.7	2.7	2.7	2.7	2.7	3.2
1	3.6	3.6	3.6	3.6	4.1	4.1
1¼	4.5	4.5	4.5	4.5	4.5	4.5
1½	6.3	6.3	6.3	6.3	6.3	6.3
2	11.3	11.3	11.3	11.3	11.3	11.3
2½	16.2	16.2	16.2	15.8	15.8	16.2
3	21.6	21.6	21.6	21.2	21.6	21.6
4	32.9	32.9	32.9	33.8	32.9	32.9
5	59.4	59.4	59.4	63	63	59.4
6	74.3	74.3	74.3	76.5	72	74.3
8	117	117	117	128.7	135.9	123.8
10	196.2	196.2	196.2	218.3	229.5	204.8
12	300.2	300.2	300.2	337.1	348.8	310.5
14	423	423	423	400.5	438.8	423
16	562.5	562.5	562.5	562.5	585	562.5
18	731.3	731.3	731.3	663.8	787.5	731.3
20	922.5	922.5	922.5	798.8	1001	922.5
24	1271	1271	1271	1271	1631	1496
Welding Neck flange
Class 2500
NPS	Slip On	Thd	Socket Weld	Lap Joint	Blind	Weld Neck
1/2	...	3.2	...	3.2	3.2	3.6
3/4	...	4.1	...	3.6	4.5	4.1
1	...	5.4	...	5.4	5.4	5.9
1¼	...	8.1	...	7.7	8.1	9
1½	...	11.3	...	10.8	11.3	12.6
2	...	17.1	...	16.7	17.6	18.9
2½	...	24.8	...	23.9	25.2	23.4
3	...	37.4	...	36	38.7	42.3
4	...	57.2	...	54.9	59.9	65.7
5	...	94.5	...	91.8	100.4	109.8
6	...	145.4	...	141.3	155.3	170.1
8	...	218.3	...	211.9	239.8	259.2
10	...	416.3	...	403.7	461.3	480.6
12	...	585	...	567.9	658.8	723.6

Weights in kilograms approximately given

WEIGHTS IN THE TABLES ABOVE ARE TAKEN FROM..

Texas Flange is a leading manufacturer of industrial flanges of all different varieties. Their products include flanges according to ASME B16.5, MSS-SP-44, ASME B16.47 Series A, API type 6A, RTJ Face flanges, API-605 flanges etc.