Flange Size Chart In MM

Selecting the correct flange size is vital for efficient piping systems. In our article, we delve into the millimeter-based flange size chart, a widely used industry standard. We’ll cover flange types, standard sizes, and accurate measurement methods, empowering engineers and DIYers alike to choose the optimal flange size for their needs. With this knowledge, you can avoid leaks and malfunctions, ensuring the smooth operation of your piping system.

Flange Size Chart

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	95	67	4	M12	14
AS 2129	Table C	95	67	4	M12	14
	Table D	95	67	4	M12	14
	Table E	95	67	4	M12	14
	Table F	95	67	4	M12	14
	Table H	114	83	4	M16	17
	Table J	114	83	4	M16	17
ANSI B16.5	ANSI 150	89	60	4	13	16
	ANSI 300	95	67	4	13	16
	ANSI 600	95	67	4	13	16
	ANSI 900	121	83	4	19	22
	ANSI 1500	121	83	4	19	22
ISO 7005 (DIN)	PN6	80	55	4	M10	11
	PN10	95	65	4	M12	14
	PN16	95	65	4	M12	14
	PN20	90	60.5	4	M14	16
	PN25	95	65	4	M12	14
	PN40	95	65	4	M12	14

20mm (3/4″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	100	73	4	M12	14
AS 2129	Table C	100	73	4	M12	14
	Table D	100	73	4	M12	14
	Table E	100	73	4	M12	14
	Table F	100	73	4	M12	14
	Table H	115	83	4	M12	18
	Table J	115	83	4	M12	18
ANSI B16.5	ANSI 150	98	70	4	13	16
	ANSI 300	117	83	4	16	19
	ANSI 600	117	83	4	16	19
	ANSI 900	130	89	4	19	22
	ANSI 1500	130	89	4	19	22
ISO 7005 (DIN)	PN6	90	65	4	M10	11
	PN10	105	75	4	M12	14
	PN16	105	75	4	M12	14
	PN20	100	70	4	M14	16
	PN25	105	75	4	M12	14
	PN40	105	75	4	M12	14

25mm (1″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	115	83	4	M12	14
AS 2129	Table C	115	83	4	M12	14
	Table D	115	83	4	M12	14
	Table E	115	83	4	M12	14
	Table F	120	87	4	M16	18
	Table H	120	87	4	M16	18
	Table J	120	87	4	M16	18
ANSI B16.5	ANSI 150	110	79	4	13	16
	ANSI 300	125	89	4	16	19
	ANSI 600	125	89	4	16	19
	ANSI 900		102	4	22	25
	ANSI 1500		102	4	22	25
ISO 7005 (DIN)	PN6	100	78	4	M10	11
	PN10	115	85	4	M12	14
	PN16	115	85	4	M12	14
	PN20	110	79.5	4	M14	16
	PN25	115	85	4	M12	14
	PN40	115	85	4	M12	14

32mm (1 1/4″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	120	87	4	M12	14
AS 2129	Table C	120	87	4	M12	14
	Table D	120	87	4	M12	14
	Table E	120	87	4	M12	14
	Table F	135	98	4	M16	18
	Table H	135	98	4	M16	18
	Table J	135	98	4	M16	18
ANSI B16.5	ANSI 150	117	89	4	13	16
	ANSI 300	133	98	4	16	19
	ANSI 600	133	98	4	16	19
	ANSI 900	159	111	4	22	25
	ANSI 1500	159	111	4	22	25
ISO 7005 (DIN)	PN6	120	90	4	M12	14
	PN10	140	100	4	M16	18
	PN16	140	100	4	M16	18
	PN20	120	89	4	M14	16
	PN25	140	100	4	M16	18
	PN40	140	100	4	M16	18

40mm (1 1/2″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	135	98	4	M12	14
AS 2129	Table C	135	98	4	M12	14
	Table D	135	98	4	M12	14
	Table E	135	98	4	M12	14
	Table F	140	105	4	M16	18
	Table H	140	105	4	M16	18
	Table J	140	105	4	M16	18
ANSI B16.5	ANSI 150	127	98	4	13	16
	ANSI 300	156	114	4	19	22
	ANSI 600	156	114	4	19	22
	ANSI 900	178	124	4	25	29
	ANSI 1500	178	124	4	25	29
ISO 7005 (DIN)	PN6	130	100	4	M12	14
	PN10	150	110	4	M16	18
	PN16	150	110	4	M16	18
	PN20	130	98.5	4	M14	16
	PN25	150	110	4	M16	18
	PN40	150	110	4	M16	18

50mm (2″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	150	114	4	M16	18
	PN16	150	114	4	M16	18
	PN21	165	127	4	M16	18
	PN35	165	127	4	M16	18
AS 2129	Table C	150	114	4	M16	18
	Table D	150	114	4	M16	18
	Table E	150	114	4	M16	18
	Table F	165	127	4	M16	18
	Table H	165	127	4	M16	18
	Table J	165	127	4	M20	22
ANSI B16.5	ANSI 150	152	121	4	16	19
	ANSI 300	165	127	8	16	19
	ANSI 600	165	127	8	16	19
	ANSI 900	216	165	8	22	25
	ANSI 1500	216	165	8	22	25
ISO 7005 (DIN)	PN6	140	110	4	M12	14
	PN10	165	125	4	M16	18
	PN16	165	125	4	M16	18
	PN20	150*	120.5	4	M16	18
	PN25	165	125	4	M16	18
	PN40	165	125	4	M16	18
*When made from cast or ductile iron the OD is 155mm.

65mm (2 1/2″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	165	127	4	M16	18
	PN16	165	127	4	M16	18
	PN21	185	146	8	M16	18
	PN35	185	146	8	M16	18
AS 2129	Table C	165	127	4	M16	18
	Table D	165	127	4	M16	18
	Table E	165	127	4	M16	18
	Table F	185	146	8	M16	18
	Table H	185	146	8	M16	18
	Table J	185	146	8	M20	22
ANSI B16.5	ANSI 150	178	140	4	16	19
	ANSI 300	191	149	8	19	22
	ANSI 600	191	149	8	19	22
	ANSI 900	244	191	8	22	25
	ANSI 1500	244	191	8	25	29
ISO 7005 (DIN)	PN6	160	130	4	M12	14
	PN10	185	145	4	M16	18
	PN16	185	145	4	M16	18
	PN20	180	139.5	4	M16	18
	PN25	185	145	8	M16	18
	PN40	185	145	8	M16	18

80mm (3″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	185	146	4	M16	18
	PN16	185	146	4	M16	18
	PN21	205	165	8	M16	18
	PN35	205	165	8	M16	18
AS 2129	Table C	185	146	4	M16	18
	Table D	185	146	4	M16	18
	Table E	185	146	4	M16	18
	Table F	205	165	8	M16	18
	Table H	205	165	8	M16	18
	Table J	205	165	8	M20	22
ANSI B16.5	ANSI 150	191	152	4	16	19
	ANSI 300	210	168	8	19	22
	ANSI 600	210	168	8	19	22
	ANSI 900	241	192	8	22	25
	ANSI 1500	267	203	8	29	32
ISO 7005 (DIN)	PN6	190	150	4	M16	18
	PN10	200	160	8	M16	18
	PN16	200	160	8	M16	18
	PN20	190	152.5	4	M16	18
	PN25	200	160	8	M16	18
	PN40	185	160	8	M16	18

100mm (4″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	215	178	4	M16	18
	PN16	215	178	4	M16	18
	PN21	230	191	8	M16	18
	PN35	230	191	8	M16	18
AS 2129	Table C	215	178	4	M16	18
	Table D	215	178	4	M16	18
	Table E	215	178	8	M16	18
	Table F	230	191	8	M16	18
	Table H	230	191	8	M16	18
	Table J	230	191	8	M20	22
ANSI B16.5	ANSI 150	229	191	8	16	19
	ANSI 300	254	200	8	19	22
	ANSI 600	273	216	8	22	25
	ANSI 900	292	235	8	29	32
	ANSI 1500	311	241	8	32	35
ISO 7005 (DIN)	PN6	210	170	4	M16	18
	PN10	220	180	8	M16	24
	PN16	220	180	8	M16	18
	PN20	230	190.5	8	M16	18
	PN25	235	190	8	M20	22
	PN40	235	190	8	M20	22

125mm (5″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	255	210	8	M16	18
	PN16	255	210	8	M16	18
	PN21	280	235	8	M20	22
	PN35	280	235	8	M20	22
AS 2129	Table C	255	210	8	M16	18
	Table D	255	210	8	M16	18
	Table E	255	210	8	M16	18
	Table F	280	235	8	M20	22
	Table H	280	235	8	M20	22
	Table J	280	235	8	M24	26
ANSI B16.5	ANSI 150	254	216	8	19	22
	ANSI 300	279	235	8	19	22
	ANSI 600	330	267	8	25	29
	ANSI 900	349	279	8	32	35
	ANSI 1500	375	292	8	38	41
ISO 7005 (DIN)	PN6	240	200	8	M16	18
	PN10	250	210	8	M16	18
	PN16	250	210	8	M16	18
	PN20	255	216	8	M20	22
	PN25	270	220	8	M24	26
	PN40	270	220	8	M24	26

150mm (6″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	280	235	8	M16	18
	PN16	280	235	8	M16	18
	PN21	305	260	12	M20	22
	PN35	305	260	12	M20	22
AS 2129	Table C	280	235	8	M16	18
	Table D	280	235	8	M16	18
	Table E	280	235	8	M20	22
	Table F	305	260	12	M20	22
	Table H	305	260	12	M20	22
	Table J	305	260	12	M24	26
ANSI B16.5	ANSI 150	279	241	8	19	22
	ANSI 300	318	270	12	19	22
	ANSI 600	356	292	12	25	29
	ANSI 900	381	318	12	29	32
	ANSI 1500	394	318	12	35	38
ISO 7005 (DIN)	PN6	265	225	8	M16	18
	PN10	285	240	8	M20	22
	PN16	285	240	8	M20	22
	PN20	280	241.5	8	M20	22
	PN25	300	250	8	M24	26
	PN40	300	250	8	M24	26

200mm (8″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	335	292	8	M16	18
	PN16	335	292	8	M16	18
	PN21	370	324	12	M20	22
	PN35	370	324	12	M20	22
AS 2129	Table C	335	292	8	M16	18
	Table D	335	292	8	M16	18
	Table E	335	292	8	M20	22
	Table F	370	324	12	M20	22
	Table H	370	324	12	M20	22
	Table J	370	324	12	M24	26
ANSI B16.5	ANSI 150	343	298	8	19	22
	ANSI 300	381	330	12	19	22
	ANSI 600	419	349	12	29	32
	ANSI 900	470	394	12	35	38
	ANSI 1500	483	394	12	41	44
ISO 7005 (DIN)	PN6	320	280	8	M16	18
	PN10	340	295	8	M20	22
	PN16	340	295	12	M20	22
	PN20	345	298.5	8	M20	22
	PN25	360	310	12	M24	26
	PN40	375	320	12	M27	30

250mm (10″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	405	356	8	M20	22
	PN16	405	356	8	M20	22
	PN21	430	381	12	M24	26
	PN35	430	381	12	M24	26
AS 2129	Table C	405	356	8	M20	22
	Table D	405	356	8	M20	22
	Table E	405	356	12	M20	22
	Table F	430	381	12	M24	26
	Table H	430	381	12	M24	26
	Table J	430	381	12	M27	30
ANSI B16.5	ANSI 150	406	362	12	22	25
	ANSI 300	445	387	16	25	29
	ANSI 600	508	432	16	32	35
	ANSI 900	546	470	16	35	38
	ANSI 1500	584	483	12	41	51
ISO 7005 (DIN)	PN6	375	335	12	M16	18
	PN10	395	350	12	M20	22
	PN16	405	355	12	M24	26
	PN20	405	362	12	M24	26
	PN25	425	370	12	M27	30
	PN40	450	385	12	M30	33

300mm (12″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	455	406	12	M20	22
	PN16	455	406	12	M20	22
	PN21	490	438	16	M24	26
	PN35	490	438	16	M24	26
AS 2129	Table C	455	406	12	M20	22
	Table D	455	406	12	M20	22
	Table E	455	406	12	M24	26
	Table F	490	438	16	M24	26
	Table H	490	438	16	M24	26
	Table J	490	438	16	M27	30
ANSI B16.5	ANSI 150	483	432	12	22	25
	ANSI 300	521	451	16	29	32
	ANSI 600	559	489	20	32	35
	ANSI 900	610	533	20	35	38
	ANSI 1500	673	571	16	51	54
ISO 7005 (DIN)	PN6	440	395	12	M20	22
	PN10	445	400	12	M20	22
	PN16	460	410	12	M24	26
	PN20	485	432	12	M24	26
	PN25	485	430	16	M27	30
	PN40	515	450	16	M30	33

350mm (14″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	525	470	12	M24	26
	PN16	525	470	12	M24	26
	PN21	550	495	16	M27	30
	PN35	550	495	16	M27	30
AS 2129	Table C	525	470	12	M24	26
	Table D	525	470	12	M24	26
	Table E	525	470	12	M24	26
	Table F	550	495	16	M27	30
	Table H	550	495	16	M27	30
	Table J	550	495	16	M30	32
ANSI B16.5	ANSI 150	533	476	12	25	29
	ANSI 300	584	514	20	29	32
	ANSI 600	603	527	20	38	41
	ANSI 900	641	559	20	38	41
	ANSI 1500	749	635	16	57	60
ISO 7005 (DIN)	PN6	490	445	12	M20	22
	PN10	505	460	16	M20	22
	PN16	520	470	16	M24	26
	PN20	535	476	12	M27	35
	PN25	555	490	16	M30	33
	PN40	580	510	16	M33	36

400mm (16″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14	580	521	12	M24	26
	PN16	580	521	12	M24	26
	PN21	610	552	20	M27	30
	PN35	610	552	20	M27	30
AS 2129	Table C	580	521	12	M24	26
	Table D	580	521	12	M24	26
	Table E	580	521	12	M24	26
	Table F	610	552	20	M27	30
	Table H	610	552	20	M27	30
	Table J	610	552	20	M30	33
ANSI B16.5	ANSI 150	597	540	16	1″ (M24)	29
	ANSI 300	648	572	20	1-1/4″ (M30)	35
	ANSI 600	686	603	20	1-1/2″ (M36)	41
	ANSI 900	705	616	20	1-5/8″ (M42)	44
	ANSI 1500	826	705	16	2-1/2″ (M64)	67
ISO 7005 (DIN)	PN6	540	495	16	M20	22
	PN10	565	515	16	M24	26
	PN16	580	525	16	M27	30
	PN20	600	540	16	M27	29.5
	PN25	620	550	16	M33	36
	PN40	660	585	16	M36	39

450mm (18″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14 Flange	640	584	12	M24	26
	PN16 Flange	640	584	12	M24	26
	PN21 Flange	675	610	20	M30	33
	PN35 Flange	675	510	20	M30	33
AS 2129	Table C Flange	640	584	12	M24	26
	Table D Flange	640	584	12	M24	26
	Table E Flange	640	584	16	M24	26
	Table F Flange	675	610	20	M30	33
	Table H Flange	675	610	20	M30	33
	Table J Flange	675	610	20	M33	36
ANSI B16.5	ANSI 150 Flange	635	578	16	1-1/8″ (M27)	32
	ANSI 300 Flange	711	629	24	1-1/4″ (M30)	35
	ANSI 600 Flange	743	654	20	1-5/8″ (M42)	44
	ANSI 900 Flange	787	686	20	1-7/8″ (M48)	51
	ANSI 1500 Flange	914	775	16	2-3/4″ (M72)	73
ISO 7005 (DIN)	PN6 Flange	595	550	16	M20	22
	PN10 Flange	615	565	20	M24	26
	PN16 Flange	640	585	20	M27	30
	PN20 Flange	635	578	16	M30	32.5
	PN25 Flange	–	–	–	–	–
	PN40 Flange	–	–	–	–	–

500mm (20″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14 Flange	705	641	16	M24	26
	PN16 Flange	705	641	16	M24	26
	PN21 Flange	735	673	24	M30	33
	PN35 Flange	735	673	24	M30	33
AS 2129	Table C Flange	705	641	16	M24	26
	Table D Flange	705	641	16	M24	26
	Table E Flange	705	641	16	M24	26
	Table F Flange	735	673	24	M30	33
	Table H Flange	735	673	24	M30	33
	Table J Flange	735	673	24	M33	36
ANSI B16.5	ANSI 150 Flange	699	635	20	1-1/8″ (M27)	32
	ANSI 300 Flange	775	686	24	1-1/4″ (M30)	35
	ANSI 600 Flange	813	724	24	1-5/8″ (M42)	44
	ANSI 900 Flange	857	749	20	2″ (M48)	54
	ANSI 1500 Flange	984	832	16	3″ (M80)	79
ISO 7005 (DIN)	PN6 Flange	645	600	20	M20	22
	PN10 Flange	670	620	20	M24	26
	PN16 Flange	715	650	20	M30	33
	PN20 Flange	700	635	20	M30	32.5
	PN25 Flange	–	–	–	–	–
	PN40 Flange	–	–	–	–	–

600mm (24″)

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS 4087	PN14 Flanges	825	756	16	M27	30
	PN16 Flanges	825	756	16	M27	30
	PN21 Flanges	850	781	24	M33	36
	PN35 Flanges	750	781	24	M33	36
AS 2129	Table C Flanges	825	756	16	M27	30
	Table D Flanges	825	756	16	M27	30
	Table E Flanges	825	756	16	M30	33
	Table F Flanges	850	781	24	M33	36
	Table H Flanges	850	781	24	M33	36
	Table J Flanges	850	781	24	M36	39
ANSI B16.5	ANSI 150 Flanges	813	749	20	1-1/4″ (M30)	35
	ANSI 300 Flanges	914	813	24	1-1/2″ (M36)	41
	ANSI 600 Flanges	940	838	24	1-7/8″ (M48)	51
	ANSI 900 Flanges	1041	902	20	2-1/2″ (M64)	67
	ANSI 1500 Flanges	1168	991	16	3-1/2″ (M90)	92
ISO 7005 (DIN)	PN6 Flanges	755	705	20	M24	26
	PN10 Flanges	780	725	20	M27	30
	PN16 Flanges	840	770	20	M33	36
	PN20 Flanges	815	749.5	20	M33	36
	PN25 Flanges	–	–	–	–	–
	PN40 Flanges	–	–	–	–	–

What Are Flanges

If you’re unfamiliar with the term “flanges,” don’t worry – you’re not alone! In basic terms, flanges are a type of connecting component used in piping systems. They are typically used to join two pipes or pieces of equipment together, such as valves, pumps, or vessels. Flanges come in a variety of shapes and sizes, but all of them share a common feature: a flat, circular plane that can be bolted to another matching plane with a similar flange.

This creates a secure connection between the two pieces of equipment, allowing for the transfer of fluids or gases without any leaks or spills. Flanges are an essential component of many industrial processes, including oil and gas production, chemical manufacturing, and water treatment. By using flanges, engineers and technicians can ensure that their piping systems operate safely and efficiently, facilitating the smooth flow of materials from one place to another.

Why Is Flange Sizing Important

Flange sizing is an incredibly important aspect of any industrial piping system design. It ensures that the flanges which connect the piping sections together can withstand the pressure and stress of fluid flow, without any leaks or damage. The size of the flanges depends on the outside diameter of the pipe, the wall thickness, and the pressure rating.

Choosing the right size flange for your application is critical because it affects the overall safety, performance, and lifespan of the entire piping system. Additionally, poor flange sizing or selection can lead to costly downtime, repairs, or even catastrophic leaks. To avoid these issues, it’s important to work with experienced engineers who can help you select the right flange size based on your specific application requirements.

Flange Size Chart

Looking for a flange size chart in mm? Look no further! A flange size chart is a handy tool for determining the size of flanges, which are used to connect pipes, valves, and other equipment. In the chart, you’ll find a list of flange sizes in millimeters, along with their corresponding dimensions and pressure ratings. These charts can be a bit overwhelming at first, but with a little practice, you’ll become an expert in no time.

It’s important to select the correct flange size for your specific application to ensure a secure and leak-free connection. Don’t settle for anything less than perfect. So, the next time you’re faced with the challenge of finding the perfect flange size, be sure to consult a flange size chart for guidance.

Understanding Flange Dimensions

When it comes to choosing the right flange for your project, understanding flange dimensions is crucial. A flange size chart can help simplify the process and ensure you select the appropriate flange for your application. A flange size chart typically includes information about the outside diameter, bolt circle diameter, number of holes, and bolt hole diameter for each flange size.

It’s essential to note that flanges come in different sizes, so it’s crucial to select the correct size to ensure optimal performance and safety. It’s also worth mentioning that flanges play a crucial role in connecting pipes, valves, and other equipment, which means getting the right size is essential for the smooth operation of your system. So, take the time to understand flange dimensions, and consult a flange size chart to make an informed decision.

Types of Flange Faces

Flanges are an essential component when it comes to connecting pipes, equipment, and valves. They come in various sizes, types, and materials. Flanges are attached to the end of pipes and then bolted together to form a long pipeline.

One important factor to consider when selecting a flange is the flange face. The flange face can come in different types, which include raised face, flat face, and ring-type joint. The raised face flange is the most commonly used type as it provides a greater surface area and helps reduce the risk of leaks.

The flat face flange, on the other hand, is commonly used in connection with a gasket to help seal the joint. Lastly, the ring-type joint flange is used in high-pressure systems that involve streams containing corrosive materials. When selecting flanges, it is crucial to refer to a flange size chart to know the exact dimensions required for the application in question.

It is also important to ensure that the flanges are made from materials that can withstand the pressure, temperature, and corrosive nature of the system they are installed in.

How to Measure Flange Size in mm

If you’re working with flanges, it’s essential to understand how to measure flange size in mm. Fortunately, there is a flange size chart that you can refer to for guidance. This chart contains all the necessary information you need to measure your flange size accurately.

To begin, you’ll need to identify the flange’s nominal size, which is typically indicated on the outside diameter. Next, determine the number of bolt holes and the bolt hole diameter. Then, measure the distance between the bolt holes, referred to as the pitch circle diameter.

This measurement helps to determine whether your flange is a metric or an imperial flange. Finally, take note of the flange faces, which can either be flat faces, raised faces, or ring-type joints. Knowing the flange size is crucial when selecting gaskets, valves, and pipes that fit your flange.

Remember to use a reliable and accurate measuring tool to ensure your measurements are correct. By following these steps, you’ll be confident that your flange will fit perfectly, and you’ll avoid costly mistakes during installation. The main keyword used organically: flange size chart

Flange Size Conversion

If you’re dealing with flanges regularly, it’s important to understand their size conversions to ensure that they fit perfectly. Flange sizes can be confusing as they are measured in both inches and millimeters. A flange size chart in mm can be a lifesaver, as it can help you determine exact measurements for specific pipe sizes.

For instance, a 2-inch flange may be equal to a 50mm flange. By using a flange size chart in mm, you can avoid costly mistakes and wasted time when trying to fit parts together. Whether you’re working on a residential or commercial plumbing project, it’s essential to get the measurements right, and accessing a flange size chart in mm can help you do just that.

Overall, understanding flange size conversions can streamline the process of installation and ensure that everything fits together perfectly.

Converting Inches to mm

Converting inches to mm can be a tricky task when it comes to flange size conversion. Flanges are a crucial component in mechanical and plumbing systems and their size is often specified in inches. However, in some cases, metric measurements are required, and that’s when the conversion comes into play.

To convert inches to mm, you can use a simple mathematical formula: multiply the measurement in inches by 2 This will give you the equivalent measurement in millimeters.

For example, if you have a flange size that is specified as 6 inches, you can convert it to mm by multiplying 6 by 24 which is equal to 154 mm.

It’s important to note that when it comes to flange sizes, there are standard measurements that might differ slightly from the converted mm measurements, so it’s always best to check the manufacturer’s specifications. Converting inches to mm is a quick and easy process and can help you ensure that your mechanical and plumbing systems are operating efficiently.

Converting DN to mm

If you’re dealing with pipelines or industrial systems, chances are you may have come across the DN (diameter nominal) unit of measurement. However, if you want to ensure that a particular flange fits in your system, you’ll need to convert its DN measurement into millimeters (mm). Thankfully, this conversion is quite straightforward.

All you need to do is multiply the DN value by 24, and you’ll have the flange’s diameter in mm. For instance, if you have a DN20 flange, you’ll multiply it by 2

4 to get 508mm. Alternatively, you could use online calculators and conversion charts to make this process even easier. Just remember that accurate flange size measurements are crucial for your industrial system’s safety and performance, so make sure you double-check your conversions.

By understanding how to convert DN to mm, you’ll be one step closer to ensuring that your industrial systems operate smoothly and efficiently.

Conclusion

So there you have it, folks! The flange size chart in mm may seem like a dry and insignificant topic, but it’s essential to ensuring that your piping systems fit together seamlessly. It’s amazing how a tiny measurement can have a big impact on the overall functionality of a system. Remember, when it comes to flanges, size really does matter!”

FAQs

What is a flange size chart in mm used for?
A flange size chart in mm is a reference tool that provides the measurement specifications for the different types and sizes of flanges used in piping and engineering projects.

Can I use a flange size chart in inches instead of mm?
It is not recommended to use a flange size chart in inches if the project requires measurements in mm. Converting measurements may lead to inaccuracies and errors in the installation process.

How do I read a flange size chart in mm?
A flange size chart in mm typically lists the dimensions of the flange, including the outside diameter (OD), bolt circle diameter (BCD), and number of bolt holes. The chart may also provide information on the thickness of the flange and the diameter of the holes.

Are flange size charts in mm standardized?
Yes, flange size charts in mm are typically standardized based on international or industry standards, such as the ASME B16.5 or DIN EN 1092-1. However, it is important to double-check the specific requirements for each project to ensure compliance.