Steel Butt-Welding Pipe Fittings (JIS)

Reducing Tees and Concentric & Eccentric Reducers

JIS B2311						Unit: mm
Nominal Pipe Size (NPS)		Outside Diameter		Reducing Tees		Reducers
				Center-to-End		End-to-End
A	B	D1	D2	C	M	H
20×15	¾×½	27.2	21.7	28.6	28.6	38.1
25×20	1×¾	34.0	27.2	38.1	38.1	50.8
25×15	1×½	34.0	21.7	38.1	38.1	50.8
32×25	1¼×1	42.7	34.0	47.6	47.6	50.8
32×20	1¼×¾	42.7	27.2	47.6	47.6	50.8
32×15	1¼×½	42.7	21.7	47.6	47.6	50.8
40×32	1 ½×1¼	48.6	42.7	57.2	57.2	63.5
40×25	1 ½×1	48.6	34.0	57.2	57.2	63.5
40×20	1 ½×¾	48.6	27.2	57.2	57.2	63.5
40×15	1 ½×½	48.6	21.7	57.2	57.2	63.5
50×40	2×1½	60.5	48.6	63.5	60.3	76.2
50×32	2×1¼	60.5	42.7	63.5	57.2	76.2
50×25	2×1	60.5	34.0	63.5	50.8	76.2
50×20	2×¾	60.5	27.2	63.5	44.5	76.2
50×15	2×½	60.5	21.7	63.5	*	76.2
65×50	2 ½×2	76.3	60.5	76.2	69.9	88.9
65×40	2 ½×1½	76.3	48.6	76.2	66.7	88.9
65×32	2 ½×1¼	76.3	42.7	76.2	63.5	88.9
65×25	2 ½×1	76.3	34.0	76.2	57.2	88.9
65×20	2 ½×¾	76.3	27.2	76.2	*	88.9
65×15	2 ½×½	76.3	21.7	76.2	*	88.9
80×65	3×2½	89.1	76.3	85.7	82.6	88.9
80×50	3×2	89.1	60.5	85.7	76.2	88.9
80×40	3×1½	89.1	48.6	85.7	73.0	88.9
80×32	3×1¼	89.1	42.7	85.7	69.9	88.9
80×25	3×1	89.1	34.0	85.7	*	88.9
80×20	3×¾	89.1	27.2	85.7	*	88.9
80×15	3×½	89.1	21.7	85.7	*	88.9
90×80	3 ½×3	101.6	89.1	95.3	92.1	101.6
90×65	3 ½×2½	101.6	76.3	95.3	88.9	101.6
90×50	3 ½×2	101.6	60.5	95.3	82.9	101.6
90×40	3 ½×1½	101.6	48.6	95.3	79.4	101.6
90×32	3 ½×1¼	101.6	42.7	95.3	*	101.6
100×90	4×3½	114.3	101.6	104.8	101.6	101.6
100×80	4×3	114.3	89.1	104.8	98.4	101.6
100×65	4×2½	114.3	76.3	104.8	95.3	101.6
100×50	4×2	114.3	60.5	104.8	88.9	101.6
100×40	4×1½	114.3	48.6	104.8	85.7	101.6
100×32	4×1¼	114.3	42.7	104.8	*	101.6
100×25	4×1	114.3	34.0	104.8	*	101.6
125×100	5×4	139.8	114.3	123.8	117.5	127.0
125×90	5×3½	139.8	101.6	123.8	114.3	127.0
125×80	5×3	139.8	89.1	123.8	111.1	127.0
125×65	5×2½	139.8	76.3	123.8	108.0	127.0
125×50	5×2	139.8	60.5	123.8	104.8	127.0
125×40	5×1½	139.8	48.6	123.8	*	127.0
125×32	5×1¼	139.8	42.7	123.8	*	127.0
150×125	6×5	165.2	139.8	142.9	136.5	139.7
150×100	6×4	165.2	114.3	142.9	130.2	139.7
150×90	6×3½	165.2	101.6	142.9	127.0	139.7
150×80	6×3	165.2	89.1	142.9	123.8	139.7
150×65	6×2½	165.2	76.3	142.9	120.7	139.7
150×50	6×2	165.2	60.5	142.9	*	139.7
200×150	8×6	216.3	165.2	177.8	168.3	152.4
200×125	8×5	216.3	139.8	177.8	161.9	152.4
200×100	8×4	216.3	114.3	177.8	155.6	152.4
200×90	8×3½	216.3	101.6	177.8	152.4	152.4
200×80	8×3	216.3	89.1	177.8	152.4	152.4
250×200	10×8	267.4	216.3	215.9	203.2	177.8
250×150	10×6	267.4	165.2	215.9	193.7	177.8
250×125	10×5	267.4	139.8	215.9	190.5	177.8
250×100	10×4	267.4	114.3	215.9	184.2	177.8
250×80	10×3	267.4	89.1	215.9	*	177.8
300×250	12×10	318.5	267.4	254.0	241.3	203.2
300×200	12×8	318.5	216.3	254.0	228.6	203.2
300×150	12×6	318.5	165.2	254.0	219.1	203.2
300×125	12×5	318.5	139.8	254.0	215.9	203.3
300×100	12×4	318.5	114.3	254.0	*	203.3
350×300	14×12	355.6	318.5	279.4	269.9	330.2
350×250	14×10	355.6	267.4	279.4	257.2	330.2
350×200	14×8	355.6	216.3	279.4	247.7	330.2
350×150	14×6	355.6	165.2	279.4	238.1	330.2
350×125	14×5	355.6	139.8	279.4	*	330.2
400×350	16×14	406.4	355.6	304.8	304.8	355.6
400×300	16×12	406.4	318.5	304.8	295.3	355.6
400×250	16×10	406.4	267.4	304.8	282.6	355.6
400×200	16×8	406.4	216.3	304.8	273.1	355.6
400×150	16×6	406.4	165.2	304.8	263.5	355.6
450×400	18×16	457.2	406.4	342.9	330.2	381.0
450×350	18×14	457.2	355.6	342.9	330.2	381.0
450×300	18×12	457.2	318.5	342.9	320.7	381.0
450×250	18×10	457.2	267.4	342.9	308.0	381.0
450×200	18×8	457.2	216.3	342.9	298.0	381.0
500×450	20×18	508.0	457.2	381.0	368.3	508.0
500×400	20×16	508.0	406.4	381.0	355.6	508.0
500×350	20×14	508.0	355.6	381.0	355.6	508.0
500×300	20×12	508.0	318.5	381.0	346.1	508.0
500×250	20×10	508.0	267.4	381.0	333.4	508.0
500×200	20×8	508.0	216.3	381.0	523.9	508.0
550×500	22×20	558.8	508.0	419.1	406.4	508.0
550×450	22×18	558.8	457.2	419.1	393.7	508.0
550×400	22×16	558.8	406.4	419.1	381.0	508.0
550×350	22×14	558.8	355.6	419.1	381.0	508.0
600×550	24×22	609.6	558.8	431.8	431.8	508.0
600×500	24×20	609.6	508.0	431.8	431.8	508.0
600×450	24×18	609.6	457.2	431.8	419.1	508.0
600×400	24×16	609.6	406.4	431.8	406.4	508.0
600×350	24×14	609.6	355.6	431.8	406.4	508.0
600×300	24×12	609.6	318.5	431.8	397.0	508.0
650×600	26×24	660.4	609.6	495.3	482.6	609.6
650×550	26×22	660.4	558.8	495.3	469.9	609.6
650×500	26×20	660.4	508.0	495.3	457.2	609.6
650×450	26×18	660.4	457.2	495.3	444.0	609.6
700×650	28×26	711.2	660.4	520.7	520.7	609.6
700×600	28×24	711.2	609.6	520.7	508.0	609.6
700×550	28×22	711.2	558.8	520.7	495.3	609.6
700×500	28×20	711.2	508.0	520.7	483.0	609.6
750×700	30×28	762.0	711.2	558.8	546.1	609.6
750×650	30×26	762.0	660.4	558.8	546.1	609.6
750×600	30×24	762.0	609.4	558.8	533.4	609.6
750×550	30×22	762.0	558.8	558.8	520.7	609.6
800×750	32×30	812.8	762.0	596.9	584.2	609.6
800×700	32×28	812.8	711.2	596.9	571.5	609.6
800×650	32×26	812.8	660.4	596.9	571.5	609.6
800×600	32×24	812.8	609.6	596.9	559.0	609.6
850×800	34×32	863.6	812.8	635.0	622.3	609.6
850×750	34×30	863.6	762.0	635.0	609.6	609.6
850×700	34×28	863.6	711.2	635.0	596.9	609.6
850×650	34×26	863.6	660.4	635.0	596.9	609.6
900×850	36×34	914.4	863.6	673.1	660.4	609.6
900×800	36×32	914.4	812.8	673.1	647.7	609.6
900×750	36×30	914.4	762.0	673.1	635.0	609.6
900×700	36×28	914.4	711.2	673.1	622.3	609.6
950×900	38×36	965.2	914.4	711.2	711.2	609.6
950×850	38×34	965.2	863.6	711.2	698.5	609.6
950×800	38×32	965.2	812.8	711.2	685.8	609.6
950×750	38×30	965.2	762.0	711.2	673.0	609.6
1000×950	40×38	1016.0	965.2	749.3	749.3	609.6
1000×900	40×36	1016.0	914.4	749.3	736.6	609.6
1000×850	40×34	1016.0	863.6	749.3	723.9	609.6
1000×800	40×32	1016.0	812.8	749.3	711.2	609.6
1050×1000	42×40	1066.8	1016.0	762.0	711.2	609.6
1050× 950	42×38	1066.8	965.2	762.0	711.2	609.6
1050×900	42×36	1066.8	914.4	762.0	711.2	609.6
1050×850	42×34	1066.8	863.6	762.0	711.2	609.6
1100×1050	44×42	1117.6	1066.8	812.8	762.0	609.6
1100×1000	44×40	1117.6	1016.0	812.8	749.3	609.6
1100×950	44×38	1117.6	965.2	812.8	736.6	609.6
1100×900	44×36	1117.6	914.4	812.8	723.9	609.6
1150×1100	46×44	1168.4	1117.6	850.9	811.1	711.2
1150×1050	46×42	1168.4	1066.8	850.9	787.4	711.2
1150×1000	46×40	1168.4	1016.0	850.9	774.7	711.2
1150×950	46×38	1168.4	965.2	850.9	762.0	711.2
1200×1150	48×46	1219.2	1168.4	889.0	838.2	711.2
1200×1100	48×44	1219.2	1117.6	889.0	838.2	711.2
1200×1050	48×42	1219.2	1066.8	889.0	812.8	711.2
1200×1000	48×40	1219.2	1016.0	889.0	812.8	711.2