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Eng-Calculations

Dimensions of PN 400 flanges

This diagram illustrates the arrangement but not necessarily the correct number of bolt holes

Flange type 05

Flange type 11

Flange type 21

DN	Outside diameter $ D $ , in $ \mathrm{mm} $	Diameter of bolt circle $ K $ , in $ \mathrm{mm} $	Diameter of bolt hole $ L $ , in $ \mathrm{mm} $	Number of bolts	Bolts size	Outside diameter of neck $ A $ , in $ \mathrm{mm} $	Flange thickness $ C_4 $ , in $ \mathrm{mm} $	Flange thickness $ C_2 $ , in $ \mathrm{mm} $	Flange thickness $ C_3 $ , in $ \mathrm{mm} $	Centre portion $ G_{max} $ , in $ \mathrm{mm} $	Length $ H_2 $ , in $ \mathrm{mm} $	Length $ H_3 $ , in $ \mathrm{mm} $	Neck diameters $ N_1 $ , in $ \mathrm{mm} $	Neck diameters $ N_3 $ , in $ \mathrm{mm} $	Corner radius $ R_1 $ for flange type 11, in $ \mathrm{mm} $	Corner radius $ R_1 $ for flange type 21, in $ \mathrm{mm} $
10	125	85	18	4	M16	17.2	28	28	28	-	65	8	48	48	4	4
15	145	100	22	4	M20	26.9	30	30	30	-	68	8	56	57	4	4
25	180	130	26	4	M24	42.4	38	38	38	-	90	10	82	81	4	5
40	220	165	30	4	M27	60.3	48	48	48	-	110	12	106	105	6	5
50	235	180	30	8	M27	76.1	52	52	52	-	120	15	120	120	6	6
65	290	225	33	8	M30	101.6	64	64	64	-	135	18	158	158	6	6
80	305	240	33	8	M30	114.3	68	68	68	-	150	20	174	174	8	8
100	370	295	39	8	M36	139.7	80	80	80	46	175	25	216	216	8	8
125	415	340	39	12	M36	193.7	92	92	92	58	200	30	258	259	8	10
150	475	390	42	12	M39	219.1	105	105	105	74	225	35	302	302	10	10
200	585	490	48	16	M45	273	130	130	130	120	280	40	388	388	10	10