BS 4504 PN40 Flange Dimensions

BS4504 PN 40 Dimensions

Note: Now obsolete and replaced by BS EN 1092-1 see flange index page.

DN = Nominal size, D = Outside Diameter, A = Outside Dia of Neck , B1 = Bore of Type 101 & 112 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 :

Note: The flanges shown are only a small part of the range covered in BS 4504.

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 Recess: Type H.,0-ring Groove:

Note : All Dimensions in mm

DN	D	C1	C2	H1	H2	H3	R	A	N1	N2	B1	d1	f1
10	90	14	16	22	35	6	3	17,2	28	30	18	40	2
15	95	14	16	22	38	6	3	21,3	32	35	22	45	2
20	105	16	18	26	40	6	4	26,9	40	45	27,5	58	2
25	115	16	18	28	40	6	4	33,7	46	52	34,5	68	2
32	140	18	18	30	42	6	5	42,4	56	60	43,5	78	2
40	150	18	18	32	45	7	5	48,3	64	70	49,5	88	3
50	165	20	20	34	48	8	5	60,3	74	84	61,5	102	3
65	185	22	22	38	52	10	6	76,1	92	104	77,5	122	3
80	200	24	24	40	58	12	6	88,9	110	118	90,5	138	3
100	235	26	24	44	65	12	6	114,3	134	145	116	162	3
125	270	28	26	48	68	12	6	139,7	162	170	141,5	188	3
150	300	30	28	52	75	12	8	168,3	190	200	170,5	218	3
200	375	36	34	52	88	16	8	219,1	244	260	221,5	285	3
250	450	42	38	60	105	18	10	273	306	312	276,5	345	3
300	515	48	42	67	115	18	10	323,9	362	380	327,5	410	4
350	580	54	46	72	125	20	10	355,6	408	424	359,5	465	4
400	660	60	50	78	135	20	10	406,4	462	478	411,0	535	4
450	685	66	50	84	135	20	12	457,0	500	522	462,0	560	4
500	755	72	52	90	140	20	12	508,0	562	576	513,5	615	4
600	890	84	60	100	150	20	12	610,0	666	686	616,5	735	5
DN	D	C1	C2	H1	H2	H3	R	A	N1	N2	B1	d1	f1

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	320	30	12	M27
250	385	33	12	M30
300	450	33	16	M30
350	510	36	16	M33
400	585	39	16	M36
450	610	39	20	M36
500	670	42	20	M39
600	795	48	20	M45

Steel Flange Index