Nominal diameter		Ends diameter
DN	INCH(inch)	A series(MM)	B series(MM)
15	1/2	21.3	18
20	3/4	26.9	25
25	1	33.7	32
32	1.1/4	42.4	38
40	1.1/2	48.3	45
50	2	60.3	57
65	2.1/2	76.1(73)	76
80	3	88.9	89
90	3.1/2	101.6	-
100	4	114.3	108
125	5	139.7	133
150	6	168.3	159
200	8	219.1	219
250	10	273.0	273
300	12	323.9	325
350	14	355.6	377
400	16	406.4	426
450	18	457.2	478
500	20	508.0	529
550	22	559	-
600	24	610	630
650	26	660	-
700	28	711	720
750	30	762	-
800	32	813	820
850	34	864	-
900	36	914	920
950	38	965	-
1000	40	1016	1020
1050	42	1067	-
1100	44	1118	1120
1150	46	1168	-