BS EN 1092 PN25 Flange Dimensions

BS EN 1092-1 PN 25 Dimensions

DN = Nominal size, D = Outside Diameter, A = Outside Dia of Neck , B1 = Bore of Type 01 & 12 Flange, C1 = Thickness of Plate Flange,
C2 = Thickness of Weld_Neck and Boss Flange , N1 = Dia of Weld Neck , N2 = Dia of Boss ,R = corner Radius, H1 = Length of Boss Flange,
H2 = Length of Weld Neck Flange, H3 = Length of Neck : S = neck thickness

Note: The flange types shown are only a small part of the range covered in BS EN 1092-1.

type 05 is a blank flange
type13 is a screwed boss flange
type 02 is a loose plate flange used with either
a type 32 weld on plate collar or
a type 33 lapped pipe end
a type 04 flange is a loose flange for use with a
type 34 a weld-neck collar
type 21 is an integral flange

The Facings shown are type B (Raised Face). Other Facings include:
Type A..Flat:  Type C..Tongue:   Type D..Groove   Type E..Spigot:  :Type F..Recess:   Type G..O-ring Spigot:  Type H.,0-ring Groove:

A typical designation for a flange would be BS EN 1092-1/01B/DN150/PN25/ */S235JR
Key: = Standard No/Flange Type & Face Type / Nominal Size/ Pressure Rating/*/ Material Designation.
* Normally not used.   For 01 type flanges above 600 mm the bore B1 would be specified here .   * for type 11 and 31 the neck thickness (S) is specified here.
An example designation for an flange for an 800mm pipe ...  BS EN 1092-1/01B/DN800/PN25/818/S235JR

This is an extremely simplified note.   To obtain a comprehensive description with the various variations the standards must be used.

Note : All Dimensions in mm

DN	D	C1	C2	H1	H2	H3	R	A	N1	N2	B1	d1	f1	S
10	90	14	14	20	35	6	4	17,2	28	30	18	40	2	1,8
15	95	14	14	20	35	6	4	21,3	32	35	22	45	2	2,0
20	105	14	14	24	38	6	4	26,9	39	45	27,5	58	2	2,3
25	115	16	16	24	38	6	4	33,7	46	52	34,5	68	2	2,6
32	140	18	16	26	40	6	6	42,4	56	60	43,5	78	2	2,6
40	150	18	16	26	42	7	6	48,3	64	70	49,5	88	2	2,6
50	165	20	20	34	48	8	6	60,3	75	84	61,5	102	2	2,9
65	185	22	22	38	52	10	6	76,1	90	104	77,5	122	2	2,9
80	200	24	24	40	58	12	8	88,9	105	118	90,5	138	2	3,2
100	235	26	24	44	65	12	8	114,3	134	145	116	162	2	3,6
125	270	28	26	48	68	12	10	139,7	162	170	141,5	188	2	4,2
150	300	30	28	52	75	12	10	168,3	192	200	170,5	218	2	4,5
200	360	32	30	52	80	16	10	219,1	244	256	221,5	278	2	6,3
250	425	35	32	60	88	18	12	273,0	298	310	276,5	335	2	7,1
300	485	38	34	67	92	18	12	323,9	352	364	327,5	395	2	8,0
350	555	42	38	72	100	20	12	355,6	398	418	359,5	450	2	8,0
400	620	46	40	78	110	20	12	406,4	452	472	411,0	505	2	8,8
450	670	50	46	84	110	20	12	457,0	500	520	462,0	555	2	8,8
500	730	56	48	90	125	20	12	508,0	558	580	513,5	615	2	10,0
600	845	68	58	100	125	20	12	610,0	660	684	616,5	720	2	11,0
700	960	-	46	-	125	20	12	711,0	760	-	-	820	2	12,5
800	1085	-	50	-	135	22	12	813,0	864	-	-	930	2	14,2
900	1185	-	54	-	145	24	12	914,0	968	-	-	1030	2	16,0
1000	1320	-	58	-	155	24	16	1016,0	1070	-	-	1140	2	17,5
1200	1530	-	-	-	-	-	18	1219,0	-	-	-	1350	2	-
1400	1755	-	-	-	-	-	18	1422,0	-	-	-	1560	2	-
1600	1975	-	-	-	-	-	20	1626,0	-	-	-	1780	2	-
DN	D	C1	C2	H1	H2	H3	R	A	N1	N2	B1	d1	f1	S

Note: in BS EN 1092-1:2002 f1= 2 for all sizes.
In the latest versions of the relevant DIN standard. f1 varies as follow
(DN =< 32 f1 = 1-2, DN 32->250(inc) f1= 1-3, DN 250->500(inc) f1= 1-4, Dn >500 f1= 1-5 )..

Flange Bolting

K = Bolt Circle Diameter, L = Dia Of Bolt Hole,
No = Number of Holes , Size = Size of Bolts

DN	K	L	No	Size
mm	mm	mm	-	mm
10	60	14	4	M12
15	65	14	4	M12
20	75	14	4	M12
25	85	14	4	M12
32	100	18	4	M16
40	110	18	4	M16
50	125	18	4	M16
65	145	18	8	M16
80	160	18	8	M16
100	190	22	8	M20
125	220	26	8	M24
150	250	26	8	M24
200	310	26	12	M24
250	370	30	12	M27
300	430	30	16	M27
350	490	33	16	M30
400	550	36	16	M33
450	600	36	20	M33
500	660	36	20	M33
600	770	39	20	M36
700	875	42	24	M39
800	990	48	24	M45
900	1090	48	28	M45
1000	1210	56	28	M52
1200	1420	56	32	M52
1400	1640	62	36	M56
1600	1860	62	40	M56
DN	K	L	No	Size

Steel Flange Index