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DN	D	k	d4	S	d1	d3
10	90	60	40	2.0	17.2	28
15	95	65	45	2.0	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	4.0	139.7	162
150	300	250	218	4.5	168.3	192
200	375	320	285	6.3	219.1	244
250	450	385	345	7.1	273.0	306
300	515	450	410	8.0	323.9	362
DN	D	k	d4	S	d1	d3
350	580	510	465	8.8	355.6	408
400	660	585	535	11.0	406.4	462
450	685	610	560	12.5	457.0	500
500	755	670	615	14.2	508.0	562
600	890	795	735	16.0	610.0	666

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DN	d2	f	b	h1	h2	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	30	3	34	88	16	10
250	33	3	38	105	18	12
300	33	4	42	115	18	12
DN	d2	f	b	h1	h2	r
350	36	4	46	125	20	12
400	39	4	50	135	20	12
450	39	4	57	135	20	12
500	42	4	57	140	20	12
600	48	5	72	150	20	12

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DN	No of Bolts	Dia. of Hex Bolts	Length of Hex Bolts	Dia. of Stud BoltsS	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	M27	105	1″	130
250	12	M30	115	1-1/8″	145
300	16	M30	125	1-1/8″	155
DN	No of Bolts	Dia. of Hex Bolts	Length of Hex Bolts	Dia. of Stud BoltsS	Length of Stud Bolts
350	16	M33	135	1-1/4″	170
400	16	M36	145	1-3/8″	185
450	20	M36	160	1-3/8″	200
500	20	M39	165	1-1/2″	205
600	20	M45	200	1-3/4″	250

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Legend

D = Outside Diameter
k = Diameter of Bolt Circle
d2 = Diameter of Bolt Holes
d4 = Diameter of Raised Face
f = Height of Raised Face
d1 = Outside Diameter of Neck
b = Flange thickness
h1 = Length of Flange
h2 = Length of right end
d3 = Neck Diameter
r = Radius of Corners
S = Wall thickness

General notes:

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

Extra notes:

1. Hex bolt lengths and diameters & lengths of Stud Bolts are calculated.
2. All bolt lengths calculated without washers, spring washers etc. and free threads (equals 1/3 time bolt diameter).
3. Gasket thickness considered 3 mm for bolt length calculations.
4. The dimensions of the bolts are for the type 11 weld neck flange.
5. Please not that other types of flanges can be have different bolt hole diameters and thicknesses, so that the bolts even can have different dimensions.

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