ASTM A815 S31803 Duplex Steel Concentric Reducer

1. ASTM A815 S31803 Duplex Steel Concentric Reducer is a kind of pipe fitting used in pipeline that reduces the pipe size from a larger bore to a smaller bore (inner diameter). The length of the reduction is usually equal to the average of the larger and smaller pipe diameters. There are two main types of reducer: Concentric reducers,and eccentric reducer.

2. ASTM A815 S31803 Duplex Steel Concentric Reducer material available in

SPECIAL ALLOY	Inconel 600, Inconel 625, Inconel 718, Inconel X750, Incoloy 800,
	Incoloy 800H, Incoloy 825, Hastelloy C276, Monel 400, Monel K500
	WPS 31254 S32750, UNS S32760
STAINLESS STEEL	ASTM A403 WP304/304L, WP316/316L, WP321, WP347, WPS 31254
Duplex& super duplex stainless steel	ASTM A 815 UNS S31803, UNS S32750, UNS S32760

3. Dimensions Butt Weld ASTM A815 S31803 Duplex Steel Concentric Reducer ASME B16.9

NPS	O.D. D	O.D. D1	Len H
3/4-1/2	26.7	21.3	38
1-1/2	33.4	21.3	51
1-3/4	33.4	26.7	51
1.1/4-1/2	42.2	21.3	51
1.1/4-3/4	42.2	26.7	51
1.1/4-1	42.2	33.4	51
1.1/2-1/2	48.3	21.3	64
1.1/2-3/4	48.3	26.7	64
1.1/2-1	48.3	33.4	64
1.1/2-1.1/4	48.3	42.2	64
2-3/4	60.3	26.7	76
2-1	60.3	33.4	76
2-1.1/4	60.3	42.2	76
2-1.1/2	60.3	48.3	76

NPS	O.D. D	O.D. D1	Len H
2.1/2-1	73	33.4	89
2.1/2-1.1/4	73	42.2	89
2.1/2-1.1/2	73	48.3	89
2.1/2-2	73	60.3	89
3-1.1/4	88.9	42.2	89
3-1.1/2	88.9	48.3	89
3-2	88.9	60.3	89
3-2.1/2	88.9	73	89
3.1/2-1.1/4	101.6	42.2	102
3.1/2-1.1/2	101.6	48.3	102
3.1/2-2	101.6	60.3	102
3.1/2-2.1/2	101.6	73	102
3.1/2-3	101.6	88.9	102
NPS	O.D. D	O.D. D1	Len H
4-1.1/2	114.3	48.3	102
4-2	114.3	60.3	102
4-2.1/2	114.3	73	102
4-3	114.3	88.9	102
4-3.1/2	114.3	101.6	102
5-2	141.3	60.3	127
5-2.1/2	141.3	73	127
5-3	141.3	88.9	127
5-3.1/2	141.3	101.6	127
5-4	141.3	114.3	127
6-2.1/2	168.3	73	140
6-3	168.3	88.9	140
6-3.1/2	168.3	101.6	140
6-4	168.3	114.3	140
6-5	168.3	141.3	140

NPS	O.D. D	O.D. D1	Len H
8-3.1/2	219.1	101.6	152
8-4	219.1	114.3	152
8-5	219.1	141.3	152
8-6	219.1	168.3	152
10-4	273	114.3	178
10-5	273	141.3	178
10-6	273	168.3	178
10-8	273	219.1	178
12-5	323.9	141.3	203
12-6	323.9	168.3	203
12-8	323.9	219.1	203
12-10	323.9	273	203
14-6	355.6	168.3	330
14-8	355.6	219.1	330
14-10	355.6	273	330
14-12	355.6	323.9	330
NPS	O.D. D	O.D. D1	Len H
16-8	406.4	219	356
16-10	406.4	273	356
16-12	406.4	323.9	356
16-14	406.4	355.6	356
18-10	457	273	381
18-12	457	323.9	381
18-14	457	355.6	381
18-16	457	406.4	381
20-12	508	323.9	508
20-14	508	355.6	508
20-16	508	406.4	508
20-18	508	457	508
22-14	559	355.6	508
22-16	559	406.4	508
22-18	559	457	508
22-20	559	508	508

NPS	O.D. D	O.D. D1	Len H
24-16	610	406.4	508
24-18	610	457	508
24-20	610	508	508
24-22	610	559	508
26-18	660	457	610
26-20	660	508	610
26-22	660	559	610
26-24	660	610	610
28-18	711	457	610
28-20	711	508	610
28-24	711	610	610
28-26	711	660	610
30-20	762	508	610
30-24	762	610	610
30-26	762	660	610
30-28	762	711	610
32-24	813	610	610
32-26	813	660	610
32-28	813	711	610
32-30	813	762	610
NPS	O.D. D	O.D. D1	Len H
34-24	864	610	610
34-26	864	660	610
34-30	864	762	610
34-32	864	813	610
36-24	914	610	610
36-26	914	660	610
36-30	914	762	610
36-32	914	813	610
36-34	914	864	610
38-26	965	660	610
38-28	965	711	610
38-30	965	762	610
38-32	965	813	610
38-34	965	864	610
38-36	965	914	610
40-30	1016	762	610
40-32	1016	813	610
40-34	1016	864	610
40-36	1016	914	610
40-38	1016	965	610

Dimensions are in millimeters unless otherwise indicated. Wall thickness (t) must be specified by customer.

ASTM A815 WP UNS S31803

4. A815 UNS S31803/1.4462 Chemical Composition

Chemical Element	% Present
Carbon (C)	0.0 – 0.03
Chromium (Cr)	21.00 – 23.00
Manganese (Mn)	2.00 max
Silicon (Si)	1.00 max
Phosphorous (P)	0.0 – 0.03
Sulphur (S)	0.0 – 0.02
Nickel (Ni)	4.50 – 6.50
Nitrogen (N)	0.08 – 0.20
Molybdenum (Mo)	2.50 – 3.50
Iron (Fe)	Balance

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