JIS B2220 5k, 2k, 10k, 16k Flange

JIS B2220 Flanges are widely recognized for their adherence to Japanese Industrial Standards, ensuring reliable and efficient connections in piping systems. Manufactured in accordance with the JIS B2220 standard, these flanges are available in multiple types, such as slip-on, weld neck, blind, socket weld, and threaded, making them suitable for a wide range of applications.

JIS B2220 flanges are produced in materials like carbon steel, stainless steel, and alloy steel to ensure durability, corrosion resistance, and high performance under varying pressure and temperature conditions. They are available in pressure ratings such as PN10, PN16, and PN20, with precise dimensions that meet stringent quality standards. These flanges are often used in both domestic and industrial applications, providing reliable solutions for Japanese-standard piping systems.

Ample Alloys is a name synonymous with excellence in the industrial sector. Offering a broad range of JIS B2220 flanges, the company is dedicated to meeting the dynamic demands of industries worldwide. Our products, manufactured with state-of-the-art technology and superior raw materials, are known for their precision, durability, and compliance with global standards. Ample Alloys’ commitment to delivering innovative solutions ensures we remain a trusted partner for complex and challenging projects.

JIS B2220 Welding Neck Flange, JIS B2220 Blind Flange, JIS B2220 slip-on flange, JIS B2220 socket weld flange, JIS B2220 threaded flange, JIS B2220 forged flange, JIS B2220 ductile iron flange, JIS B2220 flange with coatings

JIS b2220 Flange Specifications

Size Range

15mm ( 1/2" NPS ) up to 1200 mm ( 48" NPS ), For 2500# in sizes from NPS 1/2 to NPS 12

Flange Face Type

Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ)

Stainless Steel

ASTM A182 F 304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.

Standards / Dimension

Japanese Industrial Standard (JIS B2220)

Carbon Steel

ASTM A105/A105N (SA105N), LTCS A350 LF2, A694

Alloy Steel

ASTM A182 / SA182 - F1 / F5 / F9 / F11 / F12 / F22 / F91

Pressure Class

5K, 10K, 16K, 20K, 30K

Duplex & Super Duplex

ASTM A182 / ASME SA182 - S31803, S32205, 2205, S32750, S32760, S32950, 2507.

MTC

EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103

JIS B2220 5K Flange - Dimensions

Nominal Dia. of Flange	Outside Dia. of Flange D	Sectional Dimensions of flange												Nominal Bolt Size	Welding
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. Of Applicable pipe	t	T	Dia. of Hub		Radius r	Raised Face f	Hole Dia. H	Number of Bolt Holes		Welding
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. Of Applicable pipe	t	T	a	b	Radius r	Raised Face f	Hole Dia. H	Number of Bolt Holes		W1	W2
10	75	55	39	17.8	17.3	9	–	–	–	–	1	12	4	M10	5	2.5
15	80	60	44	22.2	21.7	9	–	–	–	–	1	12	4	M10	5	3
20	85	65	49	27.7	27.2	10	–	–	–	–	1	12	4	M10	5	3
25	95	75	59	34.5	34	10	–	–	–	–	1	12	4	M10	5	3
32	115	90	70	43.2	42.7	12	–	–	–	–	2	15	4	M12	6	3
40	120	95	75	49.1	48.6	12	–	–	–	–	2	15	4	M12	6	3
50	130	105	85	61.1	60.5	14	–	–	–	–	2	15	4	M12	6	3
65	155	130	110	77.1	76.3	14	–	–	–	–	2	15	4	M12	6	4
80	180	145	121	90	89.1	14	–	–	–	–	2	19	4	M16	6	4
90	190	155	131	102.6	101.6	14	–	–	–	–	2	19	4	M16	6	4
100	200	165	141	115.4	114.3	16	–	–	–	–	2	19	8	M16	7	4
125	235	200	176	141.2	139.8	16	–	–	–	–	2	19	8	M16	7	4
150	265	230	206	166.6	165.2	18	–	–	–	–	2	19	8	M16	7	5
175	300	260	232	192.1	190.7	18	–	–	–	–	2	23	8	M20	7.5	5
200	320	280	252	218	216.3	20	–	–	–	–	2	23	8	M20	8.5	6
225	345	305	277	243.7	241.8	20	–	–	–	–	2	23	12	M20	9	6
250	385	345	317	269.5	267.4	22	–	–	–	–	2	23	12	M20	10	6
300	430	390	360	321	318.5	22	–	–	–	–	3	23	12	M20	10	6
350	480	435	403	358.1	355.6	24	–	–	–	–	3	25	12	M22	12	7
400	540	495	463	409	406.4	24	–	–	–	–	3	25	16	M22	12	7
450	605	555	523	460	457.2	24	40	495	500	5	3	25	16	M22	12	7
500	655	605	573	511	508	24	40	546	552	5	3	25	20	M22	12	7
550	720	665	630	562	558.8	26	42	597	603	5	3	27	20	M24	12	7
600	770	715	680	613	609.6	26	44	648	654	5	3	27	20	M24	12	7
650	825	770	735	664	660.4	26	48	702	708	5	3	27	24	M24	12	7
700	875	820	785	715	711.2	26	48	751	758	5	3	27	24	M24	12	7
750	945	880	840	766	762	28	52	802	810	5	3	33	24	M30	12	7
800	995	930	890	817	812.8	28	52	854	862	5	3	33	24	M30	13	8
850	1045	980	940	868	863.6	28	54	904	912	5	3	33	24	M30	13	8
900	1095	1030	990	919	914.4	30	56	956	964	5	3	33	24	M30	13	8
1000	1195	1130	1090	1021	1016	32	60	1058	1066	5	3	33	28	M30	14	9
*(1100)	1305	1240	1200	1123	1117.6	32	–	–	–	–	3	33	28	M30
*1200	1420	1350	1305	1225	1219.2	34	–	–	–	–	3	33	32	M30
*1350	1575	1505	1460	–	1371.6	34	–	–	–	–	3	33	32	M30
*1500	1730	1660	1615	–	1524	36	–	–	–	–	3	33	36	M30

JIS B2220 10K Flange - Dimensions

Nominal Dia. of Flange	Outside Dia. of Flange D	Sectional Dimensions of flange												Nominal Bolt Size	Welding
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. Of Applicable pipe	t	T	Dia. of Hub		Radius r	Raised Face f	Hole Dia. H	Number of Bolt Holes		Welding
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. Of Applicable pipe	t	T	a	b	Radius r	Raised Face f	Hole Dia. H	Number of Bolt Holes		W1	W2
10	90	65	46	17.8	17.3	12	–	–	–	–	1	15	4	M12	5	2.5
15	95	70	51	22.2	21.7	12	–	–	–	–	1	15	4	M12	5	3
20	100	75	56	27.7	27.2	14	–	–	–	–	1	15	4	M12	5	3
25	125	90	67	34.5	34	14	–	–	–	–	1	19	4	M16	5	3
32	135	100	76	43.2	42.7	16	–	–	–	–	2	19	4	M16	6	3
40	140	105	81	49.1	48.6	16	–	–	–	–	2	19	4	M16	6	3
50	155	120	96	61.1	60.5	16	–	–	–	–	2	19	4	M16	6	3
65	175	140	116	77.1	76.3	18	–	–	–	–	2	19	4	M16	6.5	4
80	185	150	126	90	89.1	18	–	–	–	–	2	19	8	M16	6.5	4
-90	195	160	136	102.6	101.6	18	–	–	–	–	2	19	8	M16	6.5	4
100	210	175	151	115.4	114.3	18	–	–	–	–	2	19	8	M16	7	4
125	250	210	182	141.2	139.8	20	–	–	–	–	2	23	8	M20	7.5	4
150	280	240	212	166.6	165.2	22	–	–	–	–	2	23	8	M20	8	5
-175	305	265	237	192.1	190.7	22	–	–	–	–	2	23	12	M20	9	5
200	330	290	262	218	216.3	22	–	–	–	–	2	23	12	M20	9	6
-255	350	310	282	243.7	241.8	22	–	–	–	–	2	23	12	M20	9	6
250	400	355	324	269.5	267.4	24	36	288	292	6	2	25	12	M22	10	6
300	445	400	368	321	318.5	24	38	340	346	6	3	25	16	M22	10	6
350	490	445	413	358.1	355.6	26	42	380	386	6	3	25	16	M22	12	7
400	560	510	475	409	406.4	28	44	436	442	6	3	27	16	M24	12	7
450	620	565	530	460	457.2	30	48	496	502	6	3	27	20	M24	14	8
500	675	620	585	511	508	30	48	548	554	6	3	27	20	M24	14	8
550	745	680	640	562	558.8	32	52	604	610	6	3	33	20	M30	15	9
600	795	730	690	613	609.6	32	52	656	662	6	3	33	24	M30	16	10
650	845	780	740	664	660.4	34	56	706	712	6	3	33	24	M30	16	10
700	905	840	800	715	711.2	34	58	762	770	6	3	33	24	M30	17	10
750	970	900	855	766	762	36	62	816	824	6	3	33	24	M30	18	11
800	1020	950	905	817	812.8	36	64	868	876	6	3	33	28	M30	19	12
-850	1070	1000	955	868	863.6	36	66	920	928	6	3	33	28	M30	19	12
900	1120	1050	1005	919	914.4	38	70	971	979	6	3	33	28	M30	22	14
1000	1235	1160	1110	1021	1016	40	74	1073	1081	6	3	39	28	M36	22	14
*(1100)	1345	1270	1220	1123	1117.6	42	–	–	–	–	3	39	28	M36
*1200	1465	1380	1325	1225	1219.2	44	–	–	–	–	3	39	32	M36
*1350	1630	1540	1480	–	1371.6	48	–	–	–	–	3	45	36	M42
*1500	1795	1700	1635	–	1524	50	–	–	–	–	3	45	40	M42

JIS B2220 16K Flange- Dimensions

Nominal Dia. of Flange	Outside Dia. of Flange D	Sectional Dimensions of flange												Nominal Bolt Size
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. Of Applicable pipe	t	T	Dia. of Hub		Radius r	Raised Face f	Hole Dia. H	Number of Bolt Holes
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. Of Applicable pipe	t	T	a	b	Radius r	Raised Face f	Hole Dia. H	Number of Bolt Holes
10	90	65	46	17.8	17.3	12	16	26	28	4	1	15	4	M12
15	95	70	51	22.2	21.7	12	16	30	32	4	1	15	4	M12
20	100	75	56	27.7	27..2	14	20	38	42	4	1	15	4	M12
25	125	90	67	34.5	34	14	20	46	50	4	1	19	4	M16
32	135	100	76	43.2	42.7	16	22	56	60	5	2	19	4	M16
40	140	105	81	49.1	48.6	16	24	62	66	5	2	19	4	M16
50	155	120	96	61.1	60.5	16	24	76	80	5	2	19	8	M16
65	175	140	116	77.1	76.3	18	26	94	98	5	2	19	8	M16
80	200	160	132	90	89.1	20	28	108	112	6	2	23	8	M20
-90	210	170	145	102.6	101.6	20	30	120	124	6	2	23	8	M20
100	225	185	160	115.4	114.3	22	34	134	138	6	2	23	8	M20
125	270	225	195	141.2	139.8	22	34	164	170	6	2	25	8	M22
150	305	260	230	166.6	165.2	24	38	196	202	6	2	25	12	M22
200	350	305	275	218	216.3	26	40	244	252	6	2	25	12	M22
250	430	380	345	269.5	267.4	28	44	304	312	6	2	27	12	M24
300	480	430	395	321	318.5	30	48	354	364	8	3	27	16	M24
350	540	480	440	358.1	355.6	34	52	398	408	8	3	33	16	M30X3
400	605	540	495	409	406.4	38	60	446	456	10	3	33	16	M30X3
450	675	605	560	460	457.2	40	64	504	514	10	3	33	20	M30X3
500	730	660	615	511	508	42	68	558	568	10	3	33	20	M30X3
-550	795	720	670	562	558.8	44	70	612	622	10	3	39	20	M36X3
600	845	770	720	613	609.6	46	74	666	676	10	3	39	24	M36X3
-650	895	820	770	664	660.4	48	77	704	726	10	5	39	24	M36X3
700	960	875	820	715	711.2	50	80	754	776	10	5	42	24	M39X3
-750	1020	935	880	766	762	52	83	806	832	10	5	42	24	M39X3
800	1085	990	930	817	812.8	54	86	865	885	10	5	48	24	M45X3
-850	1135	1040	980	868	863.6	56	89	916	936	10	5	48	24	M45X3
900	1185	1090	1030	919	914.4	58	93	968	986	10	5	48	28	M45X3
1000	1320	1210	1140	1021	1016	62	99	1070	1098	12	5	56	28	M52X3
-1100	1420	1310	1240	1123	1117.6	66	105	1180	1200	12	5	56	32	M52X3
1200	1530	1420	1350	1225	1219.2	70	112	1282	1302	12	5	56	32	M52X3

JIS B2220 20K Flange- Dimensions

Nominal Dia. of Flange	Outside Dia. of Flange D	Sectional Dimensions of flange														Reference
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. of Steel pipe	t	T	Dia. of Hub		Radius r	f	D	Number of Bolt Holes	Holes Dia. H	Nominal Bolt SIZE	S1	M	S2	N	L
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. of Steel pipe	t	T	a	b	Radius r	f	D	Number of Bolt Holes	Holes Dia. H	Nominal Bolt SIZE	S1	M	S2	N	L
10	90	65	46	17.8	17.3	14	20	30	32	4	1	–	4	15	M12	27	4	27	4	–
15	95	70	51	22.2	21.7	14	20	34	36	4	1	–	4	15	M12	31	4	31	4	–
20	100	75	56	27.7	27.2	16	22	40	42	4	1	–	4	15	M12	37	4	37	4	–
25	125	90	67	34.5	34	16	24	48	50	4	1		4	19	M16	44	4	44	4.5	–
32	135	100	76	43.2	42.7	18	26	56	60	5	2	–	4	19	M16	52	4	53	5	–
40	140	105	81	49.1	48.6	18	26	62	66	5	2	–	4	19	M16	58	4	59	5.5	–
50	155	120	96	61.1	60.5	18	26	76	80	5	2	–	8	19	M16	70	4	72	5.5	–
65	175	140	116	77.7	76.3	20	30	100	104	5	2	65.9	8	19	M16	94	6	–	–	6
80	200	160	132	90	89.1	22	34	113	117	6	2	78.1	8	23	M20	107	6	–	–	6
-90	210	170	145	102.6	101.6	24	36	126	130	6	2	90.2	8	23	M20	120	6	–	–	6
100	225	185	160	115.4	114.3	24	36	138	142	6	2	102.3	8	23	M20	132	6	–	–	6
125	270	225	195	141.2	139.8	26	40	166	172	6	2	126.6	8	25	M22	160	7	–	–	6
150	305	260	230	166.6	165.2	28	42	196	202	6	2	151	12	25	M22	186	8	–	–	6
200	350	305	275	218	216.3	30	46	244	252	6	2	199.9	12	25	M22	237	9	–	–	6
250	430	380	345	269.5	267.4	34	52	304	312	6	2	248.8	12	27	M24	290	10	–	–	6
300	480	430	395	321	318.5	36	56	354	364	8	3	297.9	16	27	M24	345	11	–	–	6
350	540	480	440	358.1	355.6	40	62	398	408	8	3	333.4	16	33	M30X3	384	12	–	–	6
400	605	540	495	409	406.4	46	70	446	456	10	3	381	16	33	M30X3	437	13	–	–	7
450	675	605	560	460	457.2	48	78	504	514	10	3	431.8	20	33	M30X3	490	15	–	–	7
500	730	660	615	511	508	50	84	558	568	10	3	482.6	20	33	M30X3	544	16	–	–	7
-550	795	720	670	562	558.8	52	90	612	622	10	3	533.4	20	39	M36X3	595	16	–	–	7
600	845	770	720	613	609.6	54	96	666	676	10	3	584.2	24	39	M36X3	646	18	–	–	7
*650	945	850	790	664	660.4	60					5		24	48	M45X3
*700	995	900	840	715	711.2	64					5		24	48	M45X3
*750	1080	970	900	766	762	68					5		24	56	M52X3
*800	1140	1030	960	817	812.8	72					5		24	56	M52X3
*850	1200	1090	1020	868	863.6	74					5		24	56	M52X3
*900	1250	1140	1070	919	914.4	76					5		28	56	M52X3

JIS B2220 30K Slip On Flange- Dimensions

Nominal Dia. of Flange	Outside Dia. of Flange D	Sectional Dimensions of flange														Reference
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. of Steel pipe	t	T	Dia. of Hub		Radius r	f	D	Number of Bolt Holes	Holes Dia. H	Nominal Bolt SIZE	S1	M	S2	N	L
		Dia. of Bolt Circle C	Dia. Of raised Face g	Inside Dia. Of Flange do	Outside Dia. of Steel pipe	t	T	a	b	Radius r	f	D	Number of Bolt Holes	Holes Dia. H	Nominal Bolt SIZE	S1	M	S2	N	L
10	90	65	46	17.8	17.3	14	20	30	32	4	1	–	4	15	M12	27	4	27	4	–
15	95	70	51	22.2	21.7	14	20	34	36	4	1	–	4	15	M12	31	4	31	4	–
20	100	75	56	27.7	27.2	16	22	40	42	4	1	–	4	15	M12	37	4	37	4	–
25	125	90	67	34.5	34	16	24	48	50	4	1		4	19	M16	44	4	44	4.5	–
32	135	100	76	43.2	42.7	18	26	56	60	5	2	–	4	19	M16	52	4	53	5	–
40	140	105	81	49.1	48.6	18	26	62	66	5	2	–	4	19	M16	58	4	59	5.5	–
50	155	120	96	61.1	60.5	18	26	76	80	5	2	–	8	19	M16	70	4	72	5.5	–
65	175	140	116	77.7	76.3	20	30	100	104	5	2	65.9	8	19	M16	94	6	–	–	6
80	200	160	132	90	89.1	22	34	113	117	6	2	78.1	8	23	M20	107	6	–	–	6
-90	210	170	145	102.6	101.6	24	36	126	130	6	2	90.2	8	23	M20	120	6	–	–	6
100	225	185	160	115.4	114.3	24	36	138	142	6	2	102.3	8	23	M20	132	6	–	–	6
125	270	225	195	141.2	139.8	26	40	166	172	6	2	126.6	8	25	M22	160	7	–	–	6
150	305	260	230	166.6	165.2	28	42	196	202	6	2	151	12	25	M22	186	8	–	–	6
200	350	305	275	218	216.3	30	46	244	252	6	2	199.9	12	25	M22	237	9	–	–	6
250	430	380	345	269.5	267.4	34	52	304	312	6	2	248.8	12	27	M24	290	10	–	–	6
300	480	430	395	321	318.5	36	56	354	364	8	3	297.9	16	27	M24	345	11	–	–	6
350	540	480	440	358.1	355.6	40	62	398	408	8	3	333.4	16	33	M30X3	384	12	–	–	6
400	605	540	495	409	406.4	46	70	446	456	10	3	381	16	33	M30X3	437	13	–	–	7
450	675	605	560	460	457.2	48	78	504	514	10	3	431.8	20	33	M30X3	490	15	–	–	7
500	730	660	615	511	508	50	84	558	568	10	3	482.6	20	33	M30X3	544	16	–	–	7
-550	795	720	670	562	558.8	52	90	612	622	10	3	533.4	20	39	M36X3	595	16	–	–	7
600	845	770	720	613	609.6	54	96	666	676	10	3	584.2	24	39	M36X3	646	18	–	–	7
*650	945	850	790	664	660.4	60					5		24	48	M45X3
*700	995	900	840	715	711.2	64					5		24	48	M45X3
*750	1080	970	900	766	762	68					5		24	56	M52X3
*800	1140	1030	960	817	812.8	72					5		24	56	M52X3
*850	1200	1090	1020	868	863.6	74					5		24	56	M52X3
*900	1250	1140	1070	919	914.4	76					5		28	56	M52X3

JIS B2220 30K Weld Neck Flange- Dimensions

Nominal Pipe Size	Outside Dia. of Flange D	Sectional Dimensions of Flange														Nominal Bolt Size
Nominal Pipe Size	Outside Dia. of Flange D	Bolt Circle Dia. C	Dia. of Raised Face g	Outside Dia. of Steel Pipe	T	b	a	R	t	d	Radius r	s	f	Number of Bolt Holes	Dia. of Hole h	Nominal Bolt Size
15	115	80	55	21.7	45	40	22	20	18	15.8	6	3.1	1	4	19	M16
20	120	85	60	27.2	45	44	27.5	20	18	21.1	6	3.2	1	4	19	M16
25	130	95	70	34	48	52	34.4	20	20	26.8	6	3.8	1	4	19	M16
32	140	105	80	42.7	52	62	43.1	30	22	35.1	6	4	2	4	19	M16
40	160	120	90	48.6	54	70	49.1	30	22	40.7	6	4.2	2	4	23	M20
50	165	130	105	60.5	57	84	61	30	22	52.2	8	4.4	2	8	19	M16
65	200	160	130	76.3	69	105	76.9	30	26	65.3	8	5.8	2	8	23	M20
80	210	170	140	89.1	73	118	89.7	30	28	76.4	8	6.1	2	8	23	M20
90	230	185	150	101.6	74	130	102	30	30	89.5	8	6.4	2	8	25	M22
100	240	195	160	114.3	76	142	115	30	32	101.5	8	6.8	2	8	25	M22
125	275	230	195	139.8	86	172	141	50	36	125.7	10	7.5	2	8	25	M22
150	325	275	235	165.2	95	202	166	50	38	150	10	8.1	2	12	27	M24
200	370	320	280	216.3	102	254	218	50	42	198.7	10	9.4	2	12	27	M24
250	450	390	345	267.4	118	312	269	50	48	247.5	12	10.6	2	12	33	M30 3
300	515	450	405	318.5	127	366	320	50	52	296.4	15	11.8	3	16	33	M30 3
350	560	495	450	355.6	134	406	357	80	54	331.8	15	12.7	3	16	33	M30 3
400	630	560	510	406.4	149	462	408	80	60	379.1	20	14.6	3	16	39

JIS B2220 Flange Facing (FLAT FACE RAISED FACE)- Dimensions

Nominal Dia of Flange	Male & Female Type				Tongue & Groove Type
Nominal Dia of Flange	C3	C4	f3	f4	C1	C2	C3	C4	f3	f4
10	38	39	6	5	28	27	38	39	6	5
15	42	43	6	5	32	31	42	43	6	5
20	50	51	6	5	38	37	50	51	6	5
25	60	61	6	5	45	44	60	61	6	5
32	70	71	6	5	55	54	70	71	6	5
40	75	76	6	5	60	59	75	76	6	5
50	90	91	6	5	70	69	90	91	6	5
65	110	111	6	5	90	89	110	111	6	5
80	120	121	6	5	100	99	120	121	6	5
90	130	131	6	5	110	109	130	131	6	5
100	145	146	6	5	125	124	145	146	6	5
125	175	176	6	5	150	149	175	176	6	5
150	215	216	6	5	190	189	215	216	6	5
20	260	261	6	5	230	229	260	261	6	5
250	325	326	6	5	295	294	325	326	6	5
300	375	376	6	5	340	339	375	376	6	5
350	415	416	6	5	380	379	415	416	6	5
400	475	476	6	5	440	439	475	476	6	5

JIS B2220 Flange Facing (Male & Female Type. Tongue & Groove Type)- Dimensions

Nominal Dia of Flange	Male & Female Type				Tongue & Groove Type
Nominal Dia of Flange	C3	C4	f3	f4	C1	C2	C3	C4	f3	f4
10	38	39	6	5	28	27	38	39	6	5
15	42	43	6	5	32	31	42	43	6	5
20	50	51	6	5	38	37	50	51	6	5
25	60	61	6	5	45	44	60	61	6	5
32	70	71	6	5	55	54	70	71	6	5
40	75	76	6	5	60	59	75	76	6	5
50	90	91	6	5	70	69	90	91	6	5
65	110	111	6	5	90	89	110	111	6	5
80	120	121	6	5	100	99	120	121	6	5
90	130	131	6	5	110	109	130	131	6	5
100	145	146	6	5	125	124	145	146	6	5
125	175	176	6	5	150	149	175	176	6	5
150	215	216	6	5	190	189	215	216	6	5
20	260	261	6	5	230	229	260	261	6	5
250	325	326	6	5	295	294	325	326	6	5
300	375	376	6	5	340	339	375	376	6	5
350	415	416	6	5	380	379	415	416	6	5
400	475	476	6	5	440	439	475	476	6	5

JIS B2220 standard flanges

The JIS B2220 standard specifies the dimensions, materials, pressure classes, and performance requirements for flanges used in piping systems based on Japanese Industrial Standards. These flanges are widely employed in industrial applications, particularly in systems adhering to Japanese or Asian specifications.

ASME/ANSI Standards (American):
- ASME B16.5 – Pipe Flanges and Flanged Fittings (NPS 1/2" to 24").
- ASME B16.47 – Large Diameter Steel Flanges (Series A & B, NPS 26" to 60").
- ASME B16.36 – Orifice Flanges.
- ASME B16.48 – Line Blanks (Spectacle, Spade, and Spacer Flanges).
- ANSI B16.1 – Cast Iron Flanges and Flanged Fittings.
- ANSI B16.42 – Ductile Iron Pipe Flanges and Flanged Fittings.
ISO Standards (International)
- ISO 7005-1 – Steel Flanges for General Applications.
- ISO 7005-2 – Cast Iron Flanges.
- ISO 7005-3 – Copper Alloy Flanges.
EN Standards (European)
- EN 1092-1 – Steel Flanges.
- EN 1092-2 – Cast Iron Flanges.
- EN 1092-3 – Copper Alloy Flanges.
- EN 1092-4 – Aluminium Alloy Flanges.
DIN Standards (German)
- DIN 2527 – Blind Flanges.
- DIN 2576 – Slip-On Flanges (PN 10).
- DIN 2633 – Weld Neck Flanges (PN 16).
- DIN 2634 – Weld Neck Flanges (PN 25).
- DIN 2635 – Weld Neck Flanges (PN 40).
JIS Standards (Japanese)
- JIS B2220 – Steel Pipe Flanges.
GOST Standards (Russian)
- GOST 12820 – Flat Flanges for Steel Pipe Joints.
- GOST 12821 – Steel Welded Flanges for High-Pressure Applications.
- GOST 33259 – Flange Connections for Industrial Equipment and Pipelines.
BS Standards (British)
- BS 4504 – Circular Flanges for Pipes, Valves, and Fittings.
- BS 10 – Specification for Flanges and Bolting.
API Standards (Oil & Gas)
- API 6A – Wellhead and Christmas Tree Equipment Flanges.
- API 605 – Large-Diameter Carbon Steel Flanges (merged into ASME B16.47 Series B).
AWWA Standards (Waterworks)
- AWWA C207 – Steel Ring Flanges for Waterworks Service.
MSS Standards (Manufacturer's Standardization Society)
- MSS SP-44 – Steel Pipe Flanges (merged into ASME B16.47 Series A).
- MSS SP-51 – Flanges for Glass-Lined Equipment.
Material-Specific Standards (ASTM)
- ASTM A105 – Carbon Steel Forged Flanges.
- ASTM A182 – Alloy and Stainless Steel Forged Flanges.
- ASTM A350 – Carbon and Low-Alloy Steel Flanges for Low-Temperature Service.
- ASTM A694 – High-Strength Carbon and Alloy Steel Flanges for High-Pressure Applications.
Other Regional and Specialized Standards
- KS B1511 – Korean Standard Flanges.
- NF E29-206 – French Standard Flanges.
- SANS 1123 – South African Standard for Steel Flanges.

Why Ample Alloys For JIS B2220 PN10 flange!

Ample Alloys stands out as a trusted supplier and manufacturer for JIS B2220 flanges, offering exceptional quality, precise manufacturing, and excellent customer service.

Commitment to Quality

Adherence to JIS B2220 specifications, ensuring durable, reliable flanges for demanding applications.

Precision Engineering

Advanced manufacturing techniques for perfect alignment, sealing, and performance.

Global Compliance

Conforms to international standards like ASME B16.5, DIN, and ISO for cross-compliance across industries.

Customization Options

Custom sizes, pressure ratings, and flange face types tailored to specific requirements.

What materials are JIS B2220 flanges made from?

JIS B2220 flanges are available in a variety of materials, including carbon steel, stainless steel, alloy steel, and other specialized alloys, depending on the specific requirements of the application.

What pressure ratings are available for JIS B2220 flanges?

JIS B2220 flanges are available in multiple pressure ratings, commonly ranging from PN 10 to PN 40, to meet the demands of different operating conditions.

How do JIS B2220 flanges compare to other flange standards like ASME or DIN?

JIS B2220 flanges are similar to ASME and DIN standards, with equivalent pressure ratings and material specifications, making them suitable for international projects. However, slight differences may exist in dimensions and design.