BS 4865

BS 4865 : Part 1 : 1989

Tables 8 Dimensions of gaskets for PN 40 flanges
DN	*Gasket inside diameter**	IBC gasket outside diameter	Full face gasket				Spigot and recess gasket outside diameter	Tongue and groove gasket		DN
			Outside diameter	Holes		Bolt circle diameter		Tongue and groove gasket
			Outside diameter	No	Diameter	Bolt circle diameter		Inside diameter	Outside diameter
	mm	mm	mm		mm	mm	mm	mm	mm
10	18	46	90	4	14	60	34	24	34	10
15	22	51	95	4	14	65	39	29	39	15
20	27	61	105	4	14	75	50	36	50	20
25	34	71	115	4	14	85	57	43	57	25
32	43	82	140	4	18	100	65	51	65	32
40	49	92	150	4	18	110	75	61	75	40
50	61	107	165	4	18	125	87	73	87	50
65	77	127	185	8	18	145	109	95	109	65
80	89	142	200	8	18	160	120	106	120	80
100	115	168	235	8	22	190	149	129	149	100
125	141	194	270	8	26	220	175	155	175	125
150	169	224	300	8	26	250	203	183	203	150
200	220	290	375	12	30	320	259	239	259	200
250	273	352	450	12	33	385	312	292	312	250
300	324	417	515	16	33	450	363	343	363	300
350	356	474	580	16	36	510	421	395	421	350
400	407	546	660	16	39	585	473	447	473	400
450	458	571	685	20	39	610	523	497	523	450
500	508	628	755	20	42	670	575	549	575	500
600	610	747	890	20	48	795	675	649	675	600
*	Except tongue and groove gasket
*	See clause 7 for inside diameters of gaskets to suit BS 4772 flanges.