JIS B2220 Flanges | 5K 10K 16K 20K | Japanese Standard

JIS B2220 flanges are Japanese Industrial Standard flanges made to JIS B2220, a specification used widely in Japan and across Asia for steel pipe flanges in pressure piping. The standard covers nominal pressures from 5K to 63K, which line up roughly with various PN and Class ratings, and nominal diameters from 10A to 1500A. It defines several flange types, including plate (SOP), slip-on (SOH), weld neck (WN), blind, socket weld, and lap joint, with set dimensions, bolt patterns, and facing finishes. These flanges are known for tight manufacturing precision, easy interchangeability, and strict Japanese quality control. PM Industries supplies and stocks them in a full range of ratings, sizes, and materials.

We supply JIS B2220 flanges in carbon steel (SS400, SF440), stainless steel (SUS304, SUS316), and alloy grades, chosen to match pressure, temperature, and corrosion conditions. The standard sets raised face, flat face, and other sealing surfaces suited to different gaskets. You will find these flanges in shipbuilding, power plants, chemical and petrochemical facilities, oil refineries, water treatment plants, and general industrial piping that runs on metric or JIS pipe systems. The design holds up well against the vibration, thermal cycling, and mechanical stress common in marine and heavy industrial work.

Engineers reach for JIS B2220 flanges because they are proven, easy to install, and a natural fit with Japanese-made equipment and piping. Material certificates and pressure-temperature rating tables give full traceability and clear application limits. On international projects, these flanges often act as the link between Asian manufacturing standards and global installations.

PM Industries holds a broad stock of JIS B2220 flanges in popular ratings (5K, 10K, 16K, 20K, 30K, 40K) and materials, ready for prompt delivery with full certification. Need economical carbon steel slip-on flanges, or high-grade stainless weld neck flanges? We carry both. Tell us your rating, size, type, face, and material, and we will quote it with technical support and competitive pricing.

Specification JIS B2220 Flanges

Standards	ANSI/ASME B16.5, B16.48, ANSI Flanges, GOST Flanges, DIN Flanges, EN-1092, B16.47 Series A & B, ASME Flanges, EN Flanges, AWWA Flanges, BS Flanges.
JIS Standard	5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
DIN FLANGES	DIN 2527, 2627, 2631, 2656, 2576, 2673, 2629, 2628, 2566, 2641, 2637, 2655, 2634, 2636, 2632, 2633, 2638, 2642, 2573, 2635.
Pressure Rating	Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Types	Threaded, Plate, Screwed, Forged.
Supporting material	Gasket, Ring Joint, Flange Bolts
Size range	1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Production technique	Forged, machined and Heat treated
Available Flange Type	Weld Neck Flanges, RTJ Flanges, Slip On Flanges, Spectacle Blind Flanges, Flanges Gaskets, Square Flanges, Standard Insert Flanges, High Hub Blinds Flanges, Flat Flanges, forged flanges, Weldo / Nipo Flanges, Jacket Insert Flanges, Tongue groove Flanges, Blind Flanges, Socket Weld Flanges, Large diameter Flanges, Long Weld Neck Flanges, Spacer Blinds, SWRF Flanges, SORF Flanges, Angle Face Rings Flanges, Spades Ring Spacers Flanges, WNRF Flanges, Screwed Flanges, Insert Flanges, flanges bolts, cf flange, Lap Joint Flanges, ASME B16.36 Orifice Flanges, Plate Flange, Expander Flanges, Ring Type Joint Flanges, Loose Flanges, Reducing Flanges, puddle flange, Threaded Flanges, blank flange, vacuum flange.
Connect Type/ Flange Face Type	Ring Type Joint (RTJ), Flat Face (FF), Tongue & Groove, Small Male-Female (SMF), Lap-Joint Face (LJF), Raised Face (RF), Large Male-Female (LMF), Small Tongue.
Custom design	As per your drawing
Test	Direct-reading Spectrograph, X-ray detector, UItrasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine.
Origin	Indian / USA / Korean / West Europe / Japan
Pressure Class	PN 6 TO PN 100
Thickness	Normal Pipe Size ≤ 18
Bore Diameter	Normal Pipe ≤ 10
High Temperature	Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature	Above -29 Degree C (−20°F)
Coating/Surface Treatment:	Zinc Plated, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized.
European/African/Russian Standard Flanges	Available
Gaskets Types	Full Face, Metallic Ring, Flat Ring Gasket
Marking Standard	Name of Manufacturer
	Schedule
	Type of Flange Facing
	Pressure Class
	Nominal Pipe Size, etc
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
	Raw Materials Certificate
	100% Radiography Test Report
	Third Party Inspection Report, etc

Flange Type Available

Jis B2220 5k Flange Dimensions

JIS 5K					LTB		DRILLING DATA
NOMINAL PIPE SIZE		OUTSIDE DIAMETER OF FLANGE	THIKNESS OF FLANGE	THIKNESS OF BLIND	BOSSED LENGTH SOH.SW LI	WELD NECK LENGTH	PITCH CIRCLE DIAMETER	NUMBER OF BOLT HOLES	BOLT HOLE DIAMETER
MM	INCH	C	T	T1	L	L1	PCD	#	H
10	3/8	75	9	9	13	24	55	4	12
15	1/2	80	9	9	13	25	60	4	12
20	3/4	85	10	10	15	28	65	4	12
25	1	95	10	10	17	30	75	4	12
32	1 1/4	115	12	12	19	33	90	4	15
40	2 1/2	120	12	12	20	34	95	4	15
50	2	130	14	14	24	36	105	4	15
65	2 1/2	155	14	14	27	39	130	4	15
80	3	180	14	14	30	41	145	4	19
90	3 1/2	190	14	14	N/A	41	155	4	19
100	4	200	16	16	36	41	165	8	19
125	5	235	16	16	40	43	200	8	19
150	6	265	18	18	40	49	230	8	19
175	7	300	18	18	N/A	49	260	8	23
200	8	320	20	20	N/A	53	280	8	23
225	9	345	20	20	N/A	54	305	12	23
250	10	385	22	22	N/A	61	345	12	23
300	12	430	22	22	N/A	62	390	12	23
350	14	480	24	24	N/A	73	435	12	25
400	16	540	24	24	N/A	76	495	16	25
450	18	605	24	24	40	79	555	16	25
500	20	655	24	24	40	79	605	20	25
550	22	720	26	26	42	81	665	20	27
600	24	770	26	26	44	81	715	20	27
650	26	825	26	28	48	85	770	24	27
700	28	875	26	30	48	94	820	24	27
750	30	945	28	32	52	100	880	24	33
800	32	995	28	34	52	100	930	24	33
850	34	1045	28	36	54	108	980	24	33
900	36	1095	30	36	56	108	1030	24	33
1000	40	1195	32	40	60	116	1130	28	33

Jis B2220 10k Flange Dimensions

JIS10K					LTB		DRILLING DATA
NOMINAL PIPE SIZE		OUTSIDE DIAMETER OF FLANGE	THIKNESS OF FLANGE	THIKNESS OF BLIND	BOSSED LENGTH SOH.SW LI	WELD NECK LENGTH	PITCH CIRCLE DIAMETER	NUMBER OF BOLT HOLES	BOLT HOLE DIAMETER
MM	INCH	C	T	T1	L	L1	PCD	#	H
10	3/8	90	12	12	16	29	65	4	15
15	1/2	95	12	12	16	31	70	4	15
20	3/4	100	14	14	20	32	75	4	15
25	1	125	14	14	20	36	90	4	19
32	1 1/4	135	16	16	22	38	100	4	19
40	2 1/2	140	16	16	24	38	105	4	19
50	2	155	16	16	24	40	120	4	19
65	2 1/2	175	18	18	27	44	140	4	19
80	3	185	18	18	30	45	150	8	19
90	3 1/2	195	18	18	N/A	45	160	8	19
100	4	210	18	18	36	45	175	8	19
125	5	250	20	20	40	47	210	8	23
150	6	280	22	22	40	53	240	8	23
175	7	305	22	22	N/A	55	265	12	23
200	8	330	22	22	N/A	58	290	12	23
225	9	350	22	22	N/A	58	310	12	23
250	10	400	24	24	36	65	355	12	25
300	12	445	24	24	38	68	400	16	25
350	14	490	26	26	42	79	445	16	25
400	16	560	28	28	44	85	510	16	27
450	18	620	30	30	48	90	565	20	27
500	20	675	30	30	48	99	620	20	27
550	22	745	32	34	52	111	680	20	33
600	24	795	32	36	52	112	730	24	33
650	26	845	34	38	56	116	780	24	33
700	28	905	34	40	58	132	840	24	33
750	30	970	36	44	62	139	900	24	33
800	32	1020	36	46	64	139	950	28	33
850	34	1070	36	48	66	139	1000	28	33
900	36	1120	38	50	70	140	1050	28	33
1000	40	1235	40	56	74	151	1160	28	39

Dimensions Of Jis B2220 16k Flange

JIS16K					LTB		DRILLING DATA
NOMINAL PIPE SIZE		OUTSIDE DIAMETER OF FLANGE	THIKNESS OF FLANGE	THIKNESS OF BLIND	BOSSED LENGTH SOH.SW LI	WELD NECK LENGTH	PITCH CIRCLE DIAMETER	NUMBER OF BOLT HOLES	BOLT HOLE DIAMETER
MM	INCH	C	T	T1	L	L1	PCD	#	H
10	3/8	90	12	12	16	31	65	4	15
15	1/2	95	12	12	16	32	70	4	15
20	3/4	100	14	14	20	34	75	4	15
25	1	125	14	14	20	36	90	4	19
32	1 1/4	135	16	16	22	39	100	4	19
40	2 1/2	140	16	16	24	39	105	4	19
50	2	155	16	16	24	40	120	8	19
65	2 1/2	175	18	18	26	46	140	8	19
80	3	200	20	20	28	49	160	8	23
90	3 1/2	210	20	20	30	50	170	8	23
100	4	225	22	22	34	56	185	8	23
125	5	270	22	22	34	60	225	8	25
150	6	305	24	24	38	79	260	12	25
200	8	350	26	26	40	73	305	12	25
250	10	430	28	28	44	81	380	12	27
300	12	480	30	30	48	88	430	16	27
350	14	540	34	34	52	104	480	16	33
400	16	605	38	38	60	115	540	16	33
450	18	675	40	40	64	126	605	20	33
500	20	730	42	42	68	128	660	20	33
550	22	795	44	44	70	135	720	20	39
600	24	845	46	46	74	141	770	24	39
650	26	895	48	N/A	77	N/A	820	24	39
700	28	960	50	N/A	80	N/A	875	24	42
750	30	1020	52	N/A	83	N/A	935	24	42
800	32	1085	54	N/A	86	N/A	990	24	48
850	34	1135	56	N/A	89	N/A	1040	24	48
900	36	1185	58	N/A	93	N/A	1090	28	48
1000	40	1320	62	N/A	99	N/A	1210	28	56

Jis B2220 20k Flange Dimensions Chart

JIS20K					LTB		DRILLING DATA
NOMINAL PIPE SIZE		OUTSIDE DIAMETER OF FLANGE	THIKNESS OF FLANGE	THIKNESS OF BLIND	BOSSED LENGTH SOH.SW LI	WELD NECK LENGTH	PITCH CIRCLE DIAMETER	NUMBER OF BOLT HOLES	BOLT HOLE DIAMETER
MM	INCH	C	T	T1	L	L1	PCD	#	H
10	3/8	90	14	14	20	33	65	4	15
15	1/2	95	14	14	20	34	70	4	15
20	3/4	100	16	16	22	36	75	4	15
25	1	125	16	16	24	38	90	4	19
32	1 1/4	135	18	18	26	41	100	4	19
40	2 1/2	140	18	18	26	41	105	4	19
50	2	155	18	18	26	42	120	8	19
65	2 1/2	175	20	20	30	48	140	8	19
80	3	200	22	22	34	51	160	8	23
90	3 1/2	210	24	24	36	54	170	8	23
100	4	225	24	24	36	58	185	8	23
125	5	270	26	26	40	64	225	8	25
150	6	305	28	28	42	73	260	12	25
200	8	350	30	30	46	77	305	12	25
250	10	430	34	34	52	87	380	12	27
300	12	480	36	36	56	94	430	16	27
350	14	540	40	40	62	110	480	16	33
400	16	605	46	46	70	123	540	16	33
450	18	675	48	48	78	134	605	20	33
500	20	730	50	50	84	136	660	20	33
550	22	795	52	52	90	143	720	20	39
600	24	845	54	56	96	149	770	24	39

Jis B2220 2k Flanges Sizes

Size	d	D	C	Number of Bolts	h	t
010 - 3/8"	17.8	75	55	4	12	9
015 - 1/2"	22.2	80	60	4	12	9
020 - 3/4"	27.7	85	65	4	12	10
025 - 1"	34.5	95	75	4	12	10
032 - 1-1/4"	43.2	115	90	4	15	12
040 - 1-1/2"	49.1	120	95	4	15	12
050 - 2"	61.1	130	105	4	15	14
065 - 2-1/2"	77.1	155	130	4	15	14
080 - 3"	90.0	180	145	4	19	14
090 - 3-1/2"	102.6	190	155	4	19	14
100 - 4"	115.4	200	165	8	19	16
125 - 5"	141.2	235	200	8	19	16
150 - 6"	166.6	265	230	8	19	18
175 - 7"	192.1	300	260	8	23	18
200 - 8"	218.0	320	280	8	23	20
250 - 10"	269.5	385	345	12	23	22
300 - 12"	321.0	430	390	12	23	22
350 - 14"	358.1	480	435	12	25	24
400 - 16"	409.0	540	495	16	25	24
450 - 18"	460	605	555	16	25	24
500 - 20"	511.0	655	605	20	25	24
550 - 22"	562.0	720	665	20	27	26
600 - 24"	613.0	770	715	20	27	26
650 - 26"	664.0	825	770	24	27	26
700 - 28"	715	875	820	24	27	26

Jis B2220 Flange Weight

Standard	Class	Diameter	Bolt Circle Diameter	Number of Bolts	Bolt Size	Diameter of Bolt Hole
AS4087 Flanges	PN14 Flanges	95	67	4	M12	14
AS 2129 Flange	Table C Flanges	95	67	4	13	14
	Table D Flanges	95	67	4	13	14
	Table E Flanges	95	67	4	13	14
	Table F Flanges	95	67	4	13	14
	Table H Flanges	114	83	4	16	17
	Table J Flanges	114	83	4	16	17
ANSI B16.5 Flanges	ANSI 150 Flanges	89	60	4	13	16
	ANSI 300 Flanges	95	67	4	13	16
	ANSI 600 Flanges	95	67	4	13	16
	ANSI 900 Flanges	121	83	4	19	22
	ANSI 1500 Flanges	121	83	4	19	22
ISO 7005 (DIN) Flange	PN6 Flanges	80	55	4	M10	11
	PN10 Flanges	95	65	4	M12	14
	PN16 Flanges	95	65	4	M12	14
	PN20 Flanges	90	60.5	4	M14	16
	PN25 Flanges	95	65	4	M12	14
	PN40 Flanges	95	65	4	M12	14