Flanges : dimensions – pitch circle

Flange dimensions and bolt pitch circle are set in European and International Standards, to permit assembly of all types of flanged products.

All flanges (fixed or rotatable) on PAM pipes and fittings may be delivered in accordance with the following standards:

Bolts hole pitch circle
EN 1092
ISO 7005

Flange dimensions
EN 1092-2
ISO 7005-2

Nuts and bolts
EN 24014
EN 24016
EN 24032
EN 24034
ISO 4014
ISO 4016
ISO 4032
ISO 4034

Pitch circle

Flanges and bolts dimensions
DN	PN 10					PN 16					PN 25
	Flange			Bolt		Flange			Bolt		Flange			Bolt
	D	C	l	Nbr	d	D	C	l	Nbr	d	D	C	l	Nbr	d
	mm	mm	mm		mm	mm	mm	mm		mm	mm	mm	mm		mm
40	See PN 40					See PN 40					See PN 40
50	See PN 40					See PN 40
60	See PN 16					175	135	19	4	M16
65	See PN 16					185	145	19	4	M16
80	See PN 40					See PN 40
100	See PN 16					220	180	19	8	M16
125						250	210	19	8	M16
150						285	240	23	8	M20
200	340	295	23	8	M20	340	295	23	12	M20	360	310	28	12	M24
250	400	350	23	12	M20	400	355	28	12	M24	425	370	31	12	M27
300	455	400	23	12	M20	455	410	28	12	M24	485	430	31	16	M27
350	505	460	23	16	M20	520	470	28	16	M24	555	490	34	16	M30
400	565	515	28	16	M24	580	525	31	16	M27	620	550	37	16	M33
450	615	565	28	20	M24	640	585	31	20	M27	670	600	37	20	M33
500	670	620	28	20	M24	715	650	34	20	M30	730	660	37	20	M33
600	780	725	31	20	M27	840	770	37	20	M33	845	770	40	20	M36
700	895	840	31	24	M27	910	840	37	24	M33	960	875	43	24	M39
800	1 015	950	34	24	M30	1 025	950	40	24	M36	1 085	990	49	24	M45
900	1 115	1 050	34	28	M30	1 125	1 050	40	28	M36	1 185	1 090	49	28	M45
1 000	1 230	1 160	37	28	M33	1 255	1 170	43	28	M39	1 320	1 210	56	28	M52
1 100	1 340	1 270	37	32	M33	1 355	1 270	43	32	M39	1 420	1 310	56	32	M52
1 200	1 455	1 380	40	32	M36	1 485	1 390	49	32	M45	1 530	1 420	56	32	M52
1 400	1 675	1 590	43	36	M39	1 685	1 590	49	36	M45	1 755	1 640	62	36	M56
1 500	1 785	1 700	43	36	M39	1 820	1 710	56	36	M52	1 865	1 750	62	36	M56
1 600	1 915	1 820	49	40	M45	1 930	1 820	56	40	M52	1 975	1 860	62	40	M56
1 800	2 115	2 020	49	44	M45	2 130	2 020	56	44	M52	2 195	2 070	70	44	M64
2 000	2 325	2 230	49	48	M45	2 345	2 230	62	48	M56	2 425	2 300	70	48	M64

* Dimensions of ductile iron flanges PN 63: EN 1092-2
** Dimensions of flanged fittings PN 100: EN 1092-1
*** Length (L) given as an indication (to be checked before assembly according to the thickness of joints and gaskets used.)
DN	PN 40					PN 63*					PN 100**
	Flange			Bolt		Flange			Bolt		Flange			Bolt
	D	C	l	Nbr	d	D	C	l	Nbr	d	D	C	l	Nbr	d
	mm	mm	mm		mm	mm	mm	mm		mm	mm	mm	mm		mm
40	150	110	19	4	M16	170	125	23	4	M20	170	125	22	4	M20
50	165	125	19	4	M16	180	135	23	4	M20	195	145	26	4	M24
60	175	135	19	8	M16	190	145	23	8	M20	-	-	-	-	-
65	185	145	19	8	M16	205	160	23	8	M20	220	170	26	8	M24
80	200	160	19	8	M16	215	170	23	8	M20	230	180	26	8	M24
100	235	190	23	8	M20	250	200	28	8	M24	265	210	30	8	M27
125	270	220	28	8	M24	295	240	31	8	M27	315	250	33	8	M30
150	300	250	28	8	M24	345	280	34	8	M30	355	290	33	12	M30
200	375	320	31	12	M27	415	345	37	12	M33	430	360	36	12	M33
250	450	385	34	12	M30	470	400	37	12	M33	505	430	39	12	M36
300	515	450	34	16	M30	530	460	37	16	M33	585	500	42	16	M39

Dimensions of loose flanges

Loose flanges dimensions
DN	PN 10						PN 16
	D	g	a	b	c	Weight	D	g	a	b	c	Weight
	mm	mm	mm	mm	mm	kg	mm	mm	mm	mm	mm	kg
40	See PN 40						See PN 40
50	See PN 40						See PN 40
60	See PN 16						175	108	23	20	3	1.8
65	See PN 16						185	108	23	20	3	2.3
80	See PN 40						See PN 40
100	See PN 16						220	156	23	20	3	2.5
125							250	184	25	22	3	3.2
150							285	211	26	23	3	4.2
200	340	266	29	26	3	6	340	266	29	26	3	5.9
250	400	319	32	29	3	8,6	400	319	32	29	3	8.2
300	455	370	36	32	4	11,3	455	370	36	32	4	10.6
350	505	429	39	35	4	14,1	520	429	39	35	4	14.9
400	565	482	42	38	4	16,5	580	480	42	38	4	21
450	615	527	45	41	4	20,5	640	527	45	41	4	27
500	670	582	48	44	4	25	715	582	48	44	4	38
600	780	682	55	50	5	33	840	682	55	50	5	58

DN	PN 25						PN 40
	D	g	a	b	c	Weight	D	g	a	b	c	Weight
	mm	mm	mm	mm	mm	kg	mm	mm	mm	mm	mm	kg
40	See PN 40						150	84	22	19	3	1.4
50							165	99	22	19	3	1.6
60							175	108	22.5	19.5	3	1.4
65							185	108	22.5	19.5	3	2.4
80							200	132	23	20	3	2.3
100							235	156	23	20	3	3
125							270	184	24.5	21.5	3	4.1
150							300	211	26	23	3	5.2
200	360	266	29	26	3	7.4	375	266	33	30	3	9.2
250*	425	319	32	29	3	11.1	450	345	37	34	3	17.9
300*	485	370	36	32	4	14.2	515	409	42	38	4	23.5
350	555	429	39	35	4	21
400	620	482	42	38	4	30
450	670	527	45	41	4	35
500	730	582	48	44	4	44
600	845	682	55	50	5	61

Note
Loose flanges in the DN 40 to 200 PN 10-16-25-40 and DN 250 to 600 PN 10-16-25 ranges are interchangeable and fit on the rims of standard manufacture fittings.
* Loose flanges in the DN 250 to 300 PN 40 range require fittings to be equipped with a special rim.

Dimensions of integral flanges

Integral flanges dimensions
DN	PN 10					PN 16					PN 25
	D	g	a	b	c	D	g	a	b	c	D	g	a	b	c
	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
60	See PN 40					See PN 40					See PN 40
80	See PN 40					See PN 40
100	See PN 16					220	156	19	16	3
125						250	184	19	16	3
150						285	211	19	16	3
200	340	266	20	17	3	340	266	20	17	3	360	274	22	19	3
250	400	319	22	19	3	400	319	22	19	3	360	274	22	19	3
300	455	370	24.5	20.5	4	455	370	24.5	20.5	4	485	389	27.5	23.5	4
350	505	429	24.5	20.5	4	520	429	26.5	22.5	4	555	448	30	26	4
400	565	480	24.5	20.5	4	580	480	28	24	4	620	503	32	28	4
450	615	527	25.5	21.5	4	640	544	30	26	4	670	553	34.5	30.5	4
500	670	582	26.5	22.5	4	715	609	31.5	27.5	4	730	609	36.5	32.5	4
600	780	682	30	25	5	840	720	36	31	5	845	720	42	37	5
700	895	794	32.5	27.5	5	910	794	39.5	34.5	5	960	820	46.5	41.5	5
800	1 015	901	35	30	5	1 025	901	43	38	5	1 085	928	51	46	5
900	1 115	1 001	37.5	32.5	5	1 125	1 001	46.5	41.5	5	1 185	1 028	55.5	50.5	5
1 000	1 230	1 112	40	35	5	1 255	1 112	50	45	5	1 320	1 140	60	55	5
1 100	1 340	1 221	42.5	37.5	5	1 355	1 215	53.5	48.5	5	1 420	1 242	64.5	59.5	5
1 200	1 455	1 328	45	40	5	1 485	1 328	57	52	5	1 530	1 350	69	64	5
1 400	1 675	1 530	46	41	5	1 685	1 530	60	55	5	1 755	1 560	74	69	5
1 500	1 785	1 640	47,5	42,5	5	1 820	1 640	62,5	57,5	5	1 865	1 678	78	73	5
1 600	1 915	1 750	49	44	5	1 930	1 750	65	60	5	1 975	1 780	81	76	5
1 800	2 115	1 950	52	47	5	2 130	1 950	70	65	5	2 195	1 985	88	83	5
2 000	2 325	2 150	55	50	5	2 345	2 150	75	70	5	2 425	2 210	95	90	5

*dimensions of the ductile iron flanges given as an indication
Ductile Iron flanges thickness
DN	PN 40					PN 63		PN 100*
	D	g	a	b	c	D	dimensions of the ductile iron flanges - (a)	D	dimensions of the ductile iron flanges - (a)*
	mm	mm	mm	mm	mm	mm	mm	mm	mm
60	175	108	19	16	3	190	28	-	-
80	200	132	19	16	3	215	31	230	38*
100	235	156	19	16	3	250	33	265	42*
125	270	84	23.5	20.5	3	295	37	315	44*
150	300	211	26	23	3	345	39	355	54*
200	375	284	30	27	3	415	46	430	66*
250						470	50	please consult us
300						530	57	please consult us

Dimensions of bolts

DN	Flange bolts
	PN 10				PN 16				PN 25
	Number	Designation			Number	Designation			Number	Designation
		HM	d	L/X		HM	d	L/X		HM	d	L/X
			mm				mm				mm
40	4	HM	16	85/57	4	HM	16	85/57	4	HM	16	85/57
50	4	HM	16	85/57	4	HM	16	85/57	4	HM	16	85/57
60	4	HM	16	85/57	4	HM	16	85/57	4	HM	16	85/57
65	4	HM	16	85/57	4	HM	16	85/57	4	HM	16	85/57
80	8	HM	16	85/57	8	HM	16	85/57	8	HM	16	85/57
100	8	HM	16	90/62	8	HM	16	90/62	8	HM	20	100/72
125	8	HM	16	90/62	8	HM	16	90/62	8	HM	24	110/82
150	8	HM	20	100/72	8	HM	20	100/72	8	HM	24	110/82
200	8	HM	20	100/72	12	HM	20	100/72	12	HM	24	110/82
250	12	HM	20	110/76	12	HM	24	100/82	12	HM	27	130/90
300	12	HM	20	120/83	12	HM	24	130/93	16	HM	27	130/90
350	16	HM	20	130/93	16	HM	24	130/93	16	HM	30	140/93
400	16	HM	24	140/103	16	HM	27	150/105	16	HM	33	150/100
450	20	HM	24	130/93	20	HM	27	130/90	20	HM	33	150/100
500	20	HM	24	150/110	20	HM	30	160/110	20	HM	33	160/100
600	20	HM	27	170/122	20	HM	33	180/117	20	HM	36	180/110
700	24	HM	27	150/105	24	HM	33	150/100	24	HM	39	180/105
800	24	HM	30	160/110	24	HM	36	160/92	24	HM	45	190/110
900	28	HM	30	160/110	28	HM	36	160/92	28	HM	45	190/110
1000	28	HM	33	180/117	28	HM	39	180/105	28	HM	52	230/130
1100	32	HM	33	160/100	32	HM	39	180/105	32	HM	52	230/130
1200	32	HM	36	180/110	32	HM	45	210/115	32	HM	52	230/130
1400	36	HM	39	180/105	36	HM	45	210/115	36	HM	56	260/133
1500	36	HM	39	180/105	36	HM	52	230/130	36	HM	56	260/133
1600	40	HM	45	190/110	40	HM	52	230/130	40	HM	56	260/133
1800	44	HM	45	190/110	44	HM	52	230/130	44	HM	64	300/145
2000	48	HM	45	190/110	48	HM	56	260/133	48	HM	64	300/145

* lengths (L) given as an indication (to be checked before assembly according to the thickness of joints and gaskets used.
DN	Flange bolts
	PN 40				PN 63				PN100
	Number	Designation			Number	Designation			Number	Designation
		HM	d	L/X		HM	d	L*		HM	d	L*
			mm				mm				mm
40	4	HM	16	85/57
50	4	HM	16	85/57
60	8	HM	16	85/57
65	8	HM	16	85/57
80	8	HM	16	85/57	8	HM	20	90*	8	HM	24	110*
100	8	HM	20	100/72	8	HM	24	110*	8	HM	27	120*
125	8	HM	24	110/82	8	HM	27	120*	8	HM	30	150*
150	8	HM	24	110/82	8	HM	30	150*	8	HM	30	150*
200	12	HM	27	130/90	12	HM	33	180*	12	HM	33	180*
250	12	HM	30	140/93	12	HM	33	180*
300	16	HM	30	140/93	16	HM	33	180*