Nominal Diameter		Outside Diameter at Bevel		Center to Center O		Back to Face K
DN	NPS	Series A	Series B	Long Radius	Short Radius	Long Radius	Short Radius
15	1/2	21.3	18	76	-	48	-
20	3/4	26.9	25	76	-	51	-
25	1	33.7	32	76	51	56	41
32	1.1/4	42.4	38	95	64	70	52
40	1.1/2	48.3	45	114	76	83	62
50	2	60.3	57	152	102	106	81
65	2.1/2	76.1(73)	76	190	127	132	100
80	3	88.9	89	229	152	159	121
90	3.1/2	101.6	-	267	178	184	140
100	4	114.3	108	305	203	210	159
125	5	139.7	133	381	254	262	197
150	6	168.3	159	457	305	313	237
200	8	219.1	219	610	406	414	313
250	10	273	273	762	508	518	391
300	12	323.9	325	914	610	619	467
350	14	355.6	377	1067	711	711	533
400	16	406.4	426	1219	813	813	610
450	18	457.2	478	1372	914	914	686
500	20	508	529	1524	1016	1016	762
550	22	559	-	1676	1118	1118	838
600	24	610	630	1829	1219	1219	914
650	26	660	-	1982	1320	-	-
700	28	711	720	2134	1422	-	-
750	30	762	-	2286	1524	-	-
800	32	813	820	2438	1626	-	-
850	34	864	-	2590	1728	-	-
900	36	914	920	2744	1828	-	-
950	38	965	-	2896	1930	-	-
1000	40	1016	1020	3048	2032	-	-
1050	42	1067	-	3200	2134	-	-
1100	44	1118	1120	3352	2236	-	-
1150	46	1168	-	3506	2336	-	-
1200	48	1220	1220	3658	2440	-	-

Standards:

In accord with GB/T12459\GB/T13401\HG/T21635\HG/T21631\SY5010\SH3408\Sh409\ASME B16.9\JIS B2311/2312/2313\DIN2605/2615/2616/2617, etc.

Size Range:
Seamless: from DN15 to DN600 (1/2" ~ 24" ) Pressure Class: SCH5S ~ SCH160S
Welded (single ) From DN1to DN600(1/2" ~ 24" ) Pressure Class: SCH5S ~ SCH160S
Welded (double) From DN200 to DN1200

Max ≤DN1800 (1/2" ~48" to ≤72" ), Pressure Class SCH5S ~ SCH160S
Materials:  
in accord with ASTM\JIS\DIN\GB.
ASTM:A234 WPB/WP12/WP11/WP22/WP5\A420 WPL6\A403 WP304/WP304L/WP316/WP316L/WP317/WP317L/WP321\S31803\2205
JIS: SUS304\SUS304L\SUS316\SUS316L\SUS316Ti\SUS317L\SUS321\SUS321H
DIN: 1.4301\1.4306\1.4401\1.4435\1.4571\1.4436\1.4438\1.4541
GB: 20#\20G\Q235A\Q235B\16Mn\16MnR\1Cr5Mo\12CrMo\12CrMoG\15CrMo\12Cr1MoV\0Cr18Ni9\00Cr19Ni10\0Cr17Ni12Mo2\0Cr18Ni12Mo2Ti\0Cr19Ni13Mo3\1Cr18Ni9Ti\0Cr18Ni10Ti