Dimensions Weld Neck Flanges Type 11 PN25 DIN EN 1092/1

Vorschweiss-Flansche Type 11 DIN EN 1092-1

OTHER PRESSURE CLASSES

PN10

PN16

PN25

PN40

PN63

PN100

PN160

PN250

PN320

PN400

DN	A	B	C	D	E	F
10	90	60	40	2	17.2	28
15	95	65	45	2	21.3	32
20	105	75	58	2.3	26.9	40
25	115	85	68	2.6	33.7	46
32	140	100	78	2.6	42.4	56
40	150	110	88	2.6	48.3	64
50	165	125	102	2.9	60.3	75
65	185	145	122	2.9	76.1	90
80	200	160	138	3.2	88.9	105
100	235	190	162	3.6	114.3	134
125	270	220	188	4	139.7	162
150	300	250	218	4.5	168.3	192
200	360	310	278	6.3	219.1	244
250	425	370	335	7.1	273	298
300	485	430	395	8	323.9	352
350	555	490	450	8	355.6	398
400	620	550	505	8.8	406.4	452
450	670	600	555	8.8	457	500
500	730	660	615	10	508	558
600	845	770	720	11	610	660
700	960	875	820	14.2	711	760
800	1085	990	930	16	813	864
900	1185	1090	1030	17.5	914	968
1000	1320	1210	1140	20	1016	1070

DN	G	H	K	M	N	R
10	14	2	16	35	6	4
15	14	2	16	38	6	4
20	14	2	18	40	6	4
25	14	2	18	40	6	4
32	18	2	18	42	6	6
40	18	3	18	45	7	6
50	18	3	20	48	8	6
65	18	3	22	52	10	6
80	18	3	24	58	12	8
100	22	3	24	65	12	8
125	26	3	26	68	12	8
150	26	3	28	75	12	10
200	26	3	30	80	16	10
250	30	3	32	88	18	12
300	30	4	34	92	18	12
350	33	4	38	100	20	12
400	36	4	40	110	20	12
450	36	4	46	110	20	12
500	36	4	48	125	20	12
600	39	5	48	125	20	12
700	42	5	50	129	20	12
800	48	5	53	138	22	12
900	48	5	57	148	24	12
1000	56	5	63	160	24	16

DN	No of bolts	Dia of Hex Bolts	Length of Hex Bolts	Dia of Stud Bolts	Length of Stud Bolts
10	4	M12	50	1/2"	65
15	4	M12	50	1/2"	65
20	4	M12	55	1/2"	70
25	4	M12	55	1/2"	70
32	4	M16	60	5/8"	80
40	4	M16	60	5/8"	80
50	4	M16	65	5/8"	80
65	8	M16	65	5/8"	85
80	8	M16	70	5/8"	90
100	8	M20	75	3/4"	95
125	8	M24	85	7/8"	110
150	8	M24	90	7/8"	115
200	12	M24	90	7/8"	115
250	12	M27	100	1"	130
300	16	M27	105	1"	130
350	16	M30	115	1.1/8"	145
400	16	M33	120	1.1/4"	160
450	20	M33	135	1.1/4"	170
500	20	M33	140	1.1/4"	175
600	20	M36	140	1.3/8"	180
700	24	M39	150	1.1/2"	195
800	24	M45	160	1.3/4"	215
900	28	M45	170	1.3/4"	220
1000	28	M52	190	2"	250

Indications..

A = Outside Diameter
B = Diameter of Bolt Circle
G = Diameter of Bolt Holes
C = Diameter of Raised Face
H = Height of Raised Face
E = Outside Diameter of Neck

K = Flange thickness
M = Length of Flange
N = Length of right end
F = Neck Diameter
R = Radius of Corners
D = Wall thickness

General notes..

Dimensions are in millimeters unless otherwise indicated.
Butt-weld ends (must be specified when ordering) DIN 3239-1-R6 edge form 22 to DIN 2559 (DIN EN ISO 9692)

Special notes..

Hex bolt lengths and diameters and lengths of Stud Bolts are calculated by the author of this website.
All lengths are calculated without washers, spring washers etc. and free threads (equals 1/3 time bolt diameter)
All lengths are calculated with a gasket thickness of 3 mm.
The dimensions of the bolts are calculated for the type 11 weld neck flange. Other types of flanges can be have different bolt hole diameters and thicknesses, so that the bolts even can have different dimensions.

Note 1.. ISO 7005-1 (steel flanges) PN 20, 50, 110, 150, 260, 420 are designed to be interchangeable with ASME B16.5 and MSS SP-44 flanges - ISO 7005-1 flanges are not identical to ASME B 16.5 and MSS SP 44 flanges but are deemed to comply with the dimensions specified in the ASME B 16.5 and MSS SP 44.

ISO 7005-2 (cast iron) flanges PN 20, 50 are designed to be interchangeable with ANSI/ASME B16.1 (gray cast iron) and B 16.42 (ductile cast iron) but they are not identical. They are deemed to comply with dimensions specified in ASME B16.1 (grey cast iron) and B 16.42 (ductile cast iron).

Note 2.. ISO PN 2.5, 6 do not have a corresponding ASME class and ASME Class 75, 400 and 800 do not have corresponding ISO PN designation. The use of these PN and Class flange ratings are therefore not recommended.