Flange facing types according to DIN EN 1092-1

Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges

This European standard specifies requirements for circular steel flanges in PN designations PN 2,5 to PN 400 and nominal sizes from DN 10 to DN 4000. This standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange face surface finish, marking, materials, pressure/ temperature ratings and flange masses.

Flange faces have to be smooth enough to ensure a tight, leak-free seal for bolted flanges.

Type A: flat face	Type D: groove face	Type G: O Ring recess
Type B: raised face	Type E: spigot	Type H: O Ring groove
Type C: tongue face	Type F: recess

Flange facing dimensions

units [mm]

DN	PN												f1	f2	f3	f4	w	x	y	z	α	R
	2.5	6	10	16	25	40	63	100	160	250	320	400
	d1
10	35	35	40	40	40	40	40	40	40	40	40	40	2	4.5	4	2	24	34	35	23	-	2.5
15	40	40	45	45	45	45	45	45	45	45	45	45					29	39	40	28	-
20	50	50	58	58	58	58	58	58	58	58	58	58					36	50	51	35	41º
25	60	60	68	68	68	68	68	68	68	68	68	68					43	57	58	42
32	70	70	78	78	78	78	78	78	78	78	78	78					51	65	66	50
40	80	80	88	88	88	88	88	88	88	88	88	88	3				61	75	76	60
50	90	90	102	102	102	102	102	102	102	102	102	102					73	87	88	72
65	110	110	122	122	122	122	122	122	122	122	122	122					95	109	110	94
80	128	128	138	138	138	138	138	138	138	138	138	138					106	120	121	105
100	148	148	158	158	162	162	162	162	162	162	162	162		5	4.5	2.5	129	149	150	128	32º	3
125	178	178	188	188	188	188	188	188	188	188	188	188					155	175	176	154
150	202	202	212	212	218	218	218	218	218	218	218	218					183	203	204	182
200	258	258	268	268	278	285	285	285	285	285	285	285					239	259	260	238
250	312	312	320	320	335	345	345	345	345	345	345	-					292	312	313	291
300	365	365	370	378	395	410	410	410	410	-	-	-	4				343	363	364	342
350	415	415	430	438	450	465	465	465	-	-	-	-		5.5	5	3	395	421	422	394	27º	3.5
400	465	465	482	490	505	535	535	535	-	-	-	-					447	473	474	446
450	520	520	532	550	555	560	560	560	-	-	-	-					497	523	524	496
500	570	570	585	610	615	615	615	615	-	-	-	-					349	375	376	548
600	670	670	685	725	720	735	735	-	-	-	-	-	5				649	675	676	648
700	775	775	800	795	820	840	840	-	-	-	-	-					751	777	778	750
800	880	880	905	900	930	960	960	-	-	-	-	-					856	882	883	855
900	980	980	1005	1000	1030	1070	1070	-	-	-	-	-					961	987	988	960
1000	1080	1080	1110	115	1140	1180	1180	-	-	-	-	-		6.5	6	4	1062	1092	1094	1060	28º	4
1200	1280	1295	1330	1330	1350	1380	1380	-	-	-	-	-					1262	1292	1294	1260
1400	1480	1510	1535	1530	1560	1600	-	-	-	-	-	-					1462	1492	1494	1460
1600	1690	1710	1760	1750	1780	1815	-	-	-	-	-	-					1662	1692	1694	1660
1800	1890	1920	1960	1950	1985	-	-	-	-	-	-	-					1862	1892	1894	1860
2000	2090	2125	2170	2150	-	-	-	-	-	-	-	-					2062	2092	2094	2060
2200	2295	2335	2370	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-
2400	2495	2545	2570	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-
2600	2695	2750	2780	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-
2800	2910	2960	2000	-	-	-	-	-	-	-	-	-		-	-		-	-	-	-	-	-
3000	3110	3160	3210	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-
3200	3310	3370	-	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-
3400	3510	3580	-	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-
3600	3720	3790	-	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-
3800	3920	-	-	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-
4000	4120	-	-	-	-	-	-	-	-	-	-	-		-	-	-	-	-	-	-	-	-

Flange facing types C, D, E, F, G and H are not used for PN 2,5 and PN 6.

Flange facing types G and H are only used for PN 10 to PN 40.