Harsh Tube & Fittings

Flange Weight Calculator – Overview

Our Flange Weight Calculator provides instant and accurate weight estimates for various flange types, sizes, pressure classes, and materials including Stainless Steel, Carbon Steel, Alloy Steel, Inconel, Monel, and Hastelloy.

Ideal for procurement, project planning, and engineering in industries such as Oil & Gas, Petrochemical, Marine, Power Plants, Refineries, Aerospace, and Industrial Piping Systems.

Compliant with ANSI/ASME B16.5, DIN, EN, BS, and JIS standards.

Flange Weight Calculator Features

Flange Types: Blind, Weld Neck, Slip-On, Lap Joint, Socket Weld, Threaded
Materials: Carbon Steel, Stainless Steel, Alloy Steel, Inconel, Monel, Hastelloy
Pressure Classes: 150#, 300#, 600#, 900#, 1500#, 2500#
Standards: ASME B16.5, DIN, EN, etc.
Accurate volume-based calculation: Weight = Volume × Density

Approximate Flange Weight Calculator (in KG)

For blind/flat face flanges or approximate estimation. For precise standard weights, refer to ASME B16.5 charts.

Outside Diameter (OD) – mm

Inside Diameter (ID) – mm

Thickness (t) – mm

Material Density (g/cm³)

Weight: 0.00 KG

Flat Face Flange Weight Chart

Class	NPS	Weld Neck	Blind	Slip On	Lap Joint	Socket Weld	Threaded
150 lb	1½	4	4	3	3	3	3
	¾	2	2	2	2	2	2
	2	6	5	5	5	5	5
	½	2	2	1	1	2	1
	1¼	3	3	3	3	3	3
	1	3	2	2	2	2	2
	2½	10	7	8	8	8	8
	5	21	20	15	15	15	15
	3½	12	13	11	11	11	12
	3	11.5	9	9	9	9	9
	4	16.5	17	13	13	13	13
	8	42	47	30	30	30	30
	6	26	27	19	19	19	19
	10	54	70	43	43	43	43
300 lb	1¼	5	6	4.5	4.5	4	4.5
	¾	3	3	3	3	3	3
	½	2	2	2	2	3	2
	1	4	4	3	3	3	3
	2	9	8	7	7	7	7
	1½	7	7	6.5	6.5	6	6.5
	10	100	124	81	91	81	81
	2½	12	12	10	10	10	10
	5	36	37	29	28	28	31
	3½	20	21	17	17	17	17
	3	18	16	13	14.5	13	14
	4	26.5	28	23.5	24	22	24
	8	69	81	58	58	58	58
	6	45	50	39	39	39	39
400 lb	1¼	4.5	6	4.5	4.5	4.5	4.5
	¾	3.5	3	3	3	3	3
	½	3	2	2	2	2	2
	1	4	4	3.5	3.5	3.5	3.5
	2	10	10	8	8	8	8
	1½	8	8	6.5	6.5	6.5	6.5
	3	18	20	15	14	15	15
	2½	14	15	12	11	12	12
	4	35	33	26	25	26	26
	3½	26	29	21	20	21	21
	8	89	100	67	64	67	67
	5	43	44	31	29	31	31
	10	125	155	91	110	91	91
	6	57	61	44	42	44	44
600 lb	1¼	6	6	5	5	5	5
	¾	4	4	3	3	3	3
	½	3	3	2	2	2	2
	1	4	4	4	4	4	4
	2	12	10	9	9	9	9
	1½	8	8	7	7	7	7
	3	23	20	16	15	16	16
	2½	18	15	13	12	13	13
	5	68	68	63	63	63	63
	3½	26	29	21	20	21	21
	4	42	41	37	36	37	37
	8	120	140	115	112	115	115
	6	81	86	80	78	80	80
	10	190	231	177	195	177	177
900 lb	1¼	10	10	10	10	10	10
	¾	7	6	6	6	6	6
	½	7	4	6	6	6	6
	1	8.5	9	7.5	7.5	7.5	7.5
	2½	31	32	31	25	31	31
	1½	14	14	14	14	14	14
	2	24	25	22	21	22	22
	4	53	54	53	51	53	53
	3	36	35	36	29	36	36
	6	110	115	110	105	110	110
	5	86	87	83	81	83	83
	10	268	290	245	277	245	245
	8	187	200	172	190	172	172
1500 lb	1¼	10	10	10	10	10	10
	¾	7	6	6	6	6	6
	½	7	4	6	6	6	6
	1	9	9	8	8	8	8
	2	25	25	25	25	25	25
	1½	14	14	14	14	14	14
	3	48	48	48	47	48	48
	2½	36	35	36	35	36	36
	5	132	140	132	140	132	132
	4	73	73	73	75	73	73
	8	275	302	260	286	260	260
	6	165	160	165	170	165	165
	10	455	510	436	485	436	436
2500 lb	1¼	20	18	–	17	–	18
	¾	9	10	–	8	–	9
	½	8	7	–	7	–	7
	1	13	12	–	12	–	12
	2	42	39	–	37	–	38
	1½	28	25	–	24	–	25
	3	94	86	–	80	–	83
	2½	52	56	–	53	–	55
	5	244	223	–	204	–	210
	4	146	133	–	122	–	127
	8	576	533	–	471	–	485
	6	378	345	–	314	–	323
	10	1068	1025	–	897	–	925

Flange Weight Calculator

Flange Weight Calculator – Overview

Flange Weight Calculator

Flange Weight Calculator Features

Approximate Flange Weight Calculator (in KG)

Weight: 0.00 KG

Flat Face Flange Weight Chart

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