How to Calculate Weight of Concentric Reducer

zhao77jie — Mon, 01 Jul 2019 05:17:47 +0000

Both eccentric & concentric reducer are belong to steel pipe reducer, they also have same weight chart and calculation formula, but the shape is different.

Concentric Reducer Weight Calculation Formula

The steel pipe reducer weight formula is 0.02466 * S <(D+d)/2 – S> * H / 1000
D = Large end diameter in mm.
d = Small end diameter in mm.
S = Large end Thickness in mm.
H = Height from end to end.

If we want to calculate the weight by formula, we need to know above 4 factors. Where can you get them? Usually we get the them from pipe reducer dimensions.

Browse our reducer products.

Butt-weld concentric reducers – The most versatile connection method with high pressure ratings.
– View details about ASME B16.9 butt-weld concentric reducers.
– View details about SS316 concentric reducers.
SCH 80 heavy-wall concentric reducers – For higher pressure applications.
– View details about SCH 80 concentric reducers.
Carbon steel eccentric reducers – Used to maintain a level bottom or top of a pipe.
– View details about carbon steel eccentric reducers.

Steel Pipe Reducer Dimensions

OD1	OD2	END TO END
NPS	NPS	H
3/4	3/8 – 1/2	38
1	1/2 – 3/4	51
1 1/4	1/2 – 1	51
1 1/2	1/2 – 1 1/4	64
2	3/4 – 1 1/2	76
2 1/2	1 – 2	89
3	1 1/4 – 2 1/2	102
4	2 – 3 1/2	102
5	2 – 4	127
6	2 1/2 – 5	140
8	3 1/2 – 6	152
10	4 – 8	178
12	5 – 10	203
14	6 – 12	330
16	6 – 14	356
18	8 – 16	381
20	10 – 18	508
22	12 – 20	508
24	12 – 22	508
26	12 – 24	610
28	14 – 26	610
30	14 – 28	610
32	20 – 30	610
34	22 – 32	610
36	22 – 34	610
38	24 – 36	610
40	28 – 38	610
42	28 – 40	610
44	32 – 42	610
46	34 – 44	711
48	36 – 46	711
52	40 – 48	711
56	40 – 52	711
60	44 – 56	711

Take all above chart, we can calculate the weight now. For example, “Concentric Reducer Weld 12 x 10 Inch 15mm BW ASTM A860 WPHY 52 ASME B16.9″. From above chart, we know the below information.
Large end diameter : 323.9mm
Small end diameter : 273.1mm
Large end thickness : 15mm
Height from end to end : 203mm
Now we take these sizes into weight formula. 0.02466 x 15 <(323.9+273.1)/2 – 15> x 203 / 1000 = 21.3kg

Concentric Reducer Weight Chart

When the description is Concentric Reducer BW Seamless 4″ x 3″ Sch 160 ASTM A234 WPB ASME B16.9. We can get the below information.
Size: 4″ x 3″
Thickness: Sch 160
Type: Concentric
Technical: Seamless
Material: ASTM A234 WPB
Standard: ASME B16.9
Now we want to know the concentric reducer weight to calculate the transportation and shipping cost, there are two necessary data that size and thickness, then we can get the weight from below chart easily. That is 2.4kg.

Concentric Reducer Weight Chart
DN	NPS	10S	20	STD	40	XS	80	160	XXS
20	3/4	0.1	/	0.1	0.1	0.1	0.1	/	/
25	1	0.1	/	0.2	0.2	0.2	0.2	/	/
32	11/4	0.1	/	0.2	0.2	0.3	0.3	0.2	/
40	11/2	0.2	/	0.3	0.3	0.4	0.4	/	/
50	2	0.3	/	0.4	0.4	0.6	0.6	0.6	1
65	21/2	0.5	/	0.8	0.8	1.0	1.0	1.0	/
80	3	0.6	/	1.1	1.1	1.4	1.4	1.7	1
90	31/2	0.7	/	1.4	1.4	1.9	1.9	/	/
100	4	0.8	/	1.6	1.6	2.3	2.3	2.4	/
125	5	1.4	/	2.81	2.8	4.0	3.9	4.4	/
150	6	1.9	/	4.0	4.0	6.0	6.0	7.1	8.6
200	8	2.8	/	6.3	6.3	6.0	9.3	10.8	12.6
250	10	4.6	7.9	10.7	10.7	9.3	17.5	18.4	17.9
300	12	7.0	11.2	15.8	16.3	14.5	25.1	32.5	29.3
350	14	14.0	25.6	28.8	32.1	21.0	56.5	53.3	41.7
400	16	17.5	30.5	38.5	48.8	37.1	79	106.0	/
450	18	21.5	35.2	44.5	64.3	48.8	102	143.0	/
500	20	36.0	62.7	62.7	98.5	58.5	165	/	/
550	22	38.0	72.6	72.6	/	80.4	181	/	/
600	24	47.5	97.0	79.1	142.0	93.8	226	/	/

Steel Pipe Diameters and Wall Thickness

Sometimes we get the diameter and thickness from steel pipe dimension chart? Because the eccentric and concentric reducer, 90 degree elbow and straight and reducing tee are all made by steel pipe. That’s why they have same sizes for connecting and welding together.

Nominal Size			Nominal Wall Thickness T
DN	NPS	OD	Sch10	Sch20	Sch30	STD	Sch40	Sch60	XS	Sch80	Sch100	Sch120	Sch140	Sch160	XXS
6	1/8	10.3	1.24		1.45	1.73	1.73		2.41	2.41
8	1/4	13.7	1.65		1.85	2024	2024		3.02	3.02
10	3/8	17.1	1.65		1.85	2.31	2.31		3.20	3.20
15	1/2	21.3	2.11		2.41	2.77	2.77		3.73	3.73				4.78	7.47
20	3/4	26.7	2.11		2.41	2.87	2.87		3.91	3.91				5.56	7.82
25	1	33.4	2.77		2.90	3.38	3.38		4.55	4.55				6.35	9.09
32	1 1/4	42.2	2.77		2.97	3.56	3.56		4.85	4.85				6.35	9.7
40	1 1/2	48.3	2.77		3.18	3.68	3.68		5.08	5.08				7.14	1015
50	2	60.3	2.77		3.18	3.91	3.91		5.54	5054				8.74	11.07
65	2 1/2	73.0	3.05		4.78	5.16	5.16		7.01	7.01				9.53	14.02
80	3	88.9	3.05		4.78	5.49	5.49		7.62	7.62				11.13	15.24
90	3 1/2	101.6	3.05		4.78	5.74	5.74		8.08	8.08
100	4	114.3	3.05		4.78	6.02	6.02		8.56	8.56		11.13		13.49	17.12
125	5	141.3	3.40			6.55	6.55		9.53	9.53		12.70		15.88	19.05
150	6	168.3	3.40			7.11	7.11		10.97	10.97		14.27		18.26	21.95
200	8	219.1	3.76	6.35	7.04	8.18	8.18	10.31	12.70	12.70	15.09	18.26	20.62	23.01	22.23
250	10	273.0	4.19	6.35	7.80	9.27	9.27	12.70	12.70	15.09	18.26	21.44	25.40	28.58	25.40
300	12	323.8	4.57	6.35	8.38	9.53	10.31	14.27	12.70	17.48	21.44	25.40	28.58	33.32	25.40
350	14	355.6	6.35	7.92	9.53	9.53	11.13	15.09	12.70	19.05	23.83	27.79	31.75	35.71
400	16	406.4	6.35	7.92	9.53	9.53	12.70	16.66	12.70	21.44	26.19	30.56	36.53	40.49
450	18	457.0	6.35	7.92	11.13	9.53	14.27	19.05	12.70	23.83	29.36	34.93	39.67	45.24
500	20	508.0	6.35	9.53	12.70	9.53	15.09	20.62	12.70	26.19	32.54	38.10	44.45	50.01
550	22	559.0	6.35	9.53	12.70	9.53		22.23	12.70	28.58	34.93	41.28	47.63	53.98
600	24	610.0	6.35	9.53	14.27	9.53	17.48	24.61	12.70	30.96	38.89	46.02	52.37	59.54

What We Can Supply for Pipe Reducer

Standard: ASME B16.9, SH3408, HG/T21635 , HG/T 21635, SY/T0510
Types: Eccentric Reducer and Concentric Reducer
Size Range: 3/4″, 1″, 2″, 3″, 4″, 6″, 8″, 10″, 12″, 16″, 20″, 22″, 24″ to 48”.
Thickness: SCH 10, 20, STD, 40, 60, 80, 100, 120, 140, 160, XXS
Surface Coatings: Black Painted, Varnished, Epoxy Coated, Galvanized
Material: Carbon Steel, Alloy Steel, Stainless Steel, Duplex Steel, Copper Nickel and Nickel Alloy.

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