STANDARD · JIS-B2220

JIS B2220 Flange Dimensions

JIS B2220:2012 · JIS B2220

JIS B2220:2012Japan, Korea, South-East Asia, marine and shipbuildingK rating

JIS B2220 is the Japanese steel pipe flange standard, sized in millimetres from 10A to 600A and rated 5K, 10K, 16K, 20K and 30K. It is specified in Japanese-designed plants, shipbuilding, marine equipment and much of South-East Asian industry.

JIS flanges use metric bolt patterns and their own outside diameters and thicknesses. A JIS 10K flange is often described as roughly equivalent to ASME Class 150, but the bolt circle and outside diameter differ — a JIS flange must be ordered as JIS and matched with JIS bolts and gaskets. The 30K series runs from 10A to 400A, and 16K/20K do not include 175A or 225A.

Base materialSS400 / S25C

Size notationA (mm nominal, e.g. 100A)

Material options5 groups

Reference data5 topics

DIMENSIONS

Dimension tables

One row per specification. Open a size for the drawing, pressure ratings and printable A4 sheet.

Weld Neck 110 Slip-On 110 Blind 110

Weld Neck: Butt-welded to the pipe with a tapered hub; used for high pressure, high temperature and cyclic service. 110 specifications.

110 specifications

Size	Rating	Outside Ø D	Thickness C	Raised face D2	Bolt circle K	Bolting	Hub A	Length H	Weight
10ADN10	5K	75	9	39	55	4 × Ø12	26	24	—	Spec sheet
10ADN10	10K	90	12	46	65	4 × Ø15	28	29	—	Spec sheet
10ADN10	16K	90	12	46	65	4 × Ø15	—	31	—	Spec sheet
10ADN10	20K	90	14	46	65	4 × Ø15	—	33	—	Spec sheet
10ADN10	30K	110	16	52	75	4 × Ø19	—	—	—	Spec sheet
15ADN15	5K	80	9	44	60	4 × Ø12	31	25	—	Spec sheet
15ADN15	10K	95	12	51	70	4 × Ø15	33	31	—	Spec sheet
15ADN15	16K	95	12	51	70	4 × Ø15	—	32	—	Spec sheet
15ADN15	20K	95	14	51	70	4 × Ø15	—	34	—	Spec sheet
15ADN15	30K	115	18	55	80	4 × Ø19	—	45	—	Spec sheet
20ADN20	5K	85	10	49	65	4 × Ø12	38	28	—	Spec sheet
20ADN20	10K	100	14	56	75	4 × Ø15	38	32	—	Spec sheet
20ADN20	16K	100	14	56	75	4 × Ø15	—	34	—	Spec sheet
20ADN20	20K	100	16	56	75	4 × Ø15	—	36	—	Spec sheet
20ADN20	30K	120	18	60	85	4 × Ø19	—	45	—	Spec sheet
25ADN25	5K	95	10	59	75	4 × Ø12	46	30	—	Spec sheet
25ADN25	10K	125	14	67	90	4 × Ø19	47	36	—	Spec sheet
25ADN25	16K	125	14	67	90	4 × Ø19	—	36	—	Spec sheet
25ADN25	20K	125	16	67	90	4 × Ø19	—	38	—	Spec sheet
25ADN25	30K	130	20	70	95	4 × Ø19	—	48	—	Spec sheet
32ADN32	5K	115	12	70	90	4 × Ø15	55	33	—	Spec sheet
32ADN32	10K	135	16	76	100	4 × Ø19	56	38	—	Spec sheet
32ADN32	16K	135	16	76	100	4 × Ø19	—	39	—	Spec sheet
32ADN32	20K	135	18	76	100	4 × Ø19	—	41	—	Spec sheet
32ADN32	30K	140	22	80	105	4 × Ø19	—	52	—	Spec sheet
40ADN40	5K	120	12	75	95	4 × Ø15	62	34	—	Spec sheet
40ADN40	10K	140	16	81	105	4 × Ø19	62	38	—	Spec sheet
40ADN40	16K	140	16	81	105	4 × Ø19	—	39	—	Spec sheet
40ADN40	20K	140	18	81	105	4 × Ø19	—	41	—	Spec sheet
40ADN40	30K	160	22	90	120	4 × Ø23	—	54	—	Spec sheet
50ADN50	5K	130	14	85	105	4 × Ø15	73	36	—	Spec sheet
50ADN50	10K	155	16	96	120	4 × Ø19	75	40	—	Spec sheet
50ADN50	16K	155	16	96	120	8 × Ø19	—	40	—	Spec sheet
50ADN50	20K	155	18	96	120	8 × Ø19	—	42	—	Spec sheet
50ADN50	30K	165	22	105	130	8 × Ø19	—	57	—	Spec sheet
65ADN65	5K	155	14	110	130	4 × Ø15	91	39	—	Spec sheet
65ADN65	10K	175	18	116	140	4 × Ø19	92	44	—	Spec sheet
65ADN65	16K	175	18	116	140	8 × Ø19	—	46	—	Spec sheet
65ADN65	20K	175	20	116	140	8 × Ø19	—	48	—	Spec sheet
65ADN65	30K	200	26	130	160	8 × Ø23	—	69	—	Spec sheet
80ADN80	5K	180	14	121	145	4 × Ø19	105	41	—	Spec sheet
80ADN80	10K	185	18	126	150	8 × Ø19	105	45	—	Spec sheet
80ADN80	16K	200	20	132	160	8 × Ø23	—	49	—	Spec sheet
80ADN80	20K	200	22	132	160	8 × Ø23	—	51	—	Spec sheet
80ADN80	30K	210	28	140	170	8 × Ø23	—	73	—	Spec sheet
90ADN90	5K	190	14	131	155	4 × Ø19	117	41	—	Spec sheet
90ADN90	10K	195	18	136	160	8 × Ø19	117	45	—	Spec sheet
90ADN90	16K	210	20	145	170	8 × Ø23	—	50	—	Spec sheet
90ADN90	20K	210	24	145	170	8 × Ø23	—	54	—	Spec sheet
90ADN90	30K	230	30	150	185	8 × Ø25	—	74	—	Spec sheet
100ADN100	5K	200	16	141	165	8 × Ø19	128	41	—	Spec sheet
100ADN100	10K	210	18	151	175	8 × Ø19	130	45	—	Spec sheet
100ADN100	16K	225	22	160	185	8 × Ø23	—	56	—	Spec sheet
100ADN100	20K	225	24	160	185	8 × Ø23	—	58	—	Spec sheet
100ADN100	30K	240	32	160	195	8 × Ø25	—	76	—	Spec sheet
125ADN125	5K	235	16	176	200	8 × Ø19	156	43	—	Spec sheet
125ADN125	10K	250	20	182	210	8 × Ø23	156	47	—	Spec sheet
125ADN125	16K	270	22	195	225	8 × Ø25	—	60	—	Spec sheet
125ADN125	20K	270	26	195	225	8 × Ø25	—	64	—	Spec sheet
125ADN125	30K	275	36	195	230	8 × Ø25	—	86	—	Spec sheet
150ADN150	5K	265	18	206	230	8 × Ø19	184	49	—	Spec sheet
150ADN150	10K	280	22	212	240	8 × Ø23	184	53	—	Spec sheet
150ADN150	16K	305	24	230	260	12 × Ø25	—	69	—	Spec sheet
150ADN150	20K	305	28	230	260	12 × Ø25	—	73	—	Spec sheet
150ADN150	30K	325	38	235	275	12 × Ø27	—	95	—	Spec sheet
175ADN175	5K	300	18	232	260	8 × Ø23	209	49	—	Spec sheet
175ADN175	10K	305	22	237	265	12 × Ø23	210	55	—	Spec sheet
200ADN200	5K	320	20	252	280	8 × Ø23	235	53	—	Spec sheet
200ADN200	10K	330	22	262	290	12 × Ø23	238	58	—	Spec sheet
200ADN200	16K	350	26	275	305	12 × Ø27	—	73	—	Spec sheet
200ADN200	20K	350	30	275	305	12 × Ø25	—	77	—	Spec sheet
200ADN200	30K	370	42	280	320	12 × Ø27	—	102	—	Spec sheet
225ADN225	5K	345	20	277	305	12 × Ø23	261	54	—	Spec sheet
225ADN225	10K	350	22	282	310	12 × Ø23	261	58	—	Spec sheet
250ADN250	5K	385	22	317	345	12 × Ø23	290	61	—	Spec sheet
250ADN250	10K	400	24	324	355	12 × Ø25	292	65	—	Spec sheet
250ADN250	16K	430	28	345	380	12 × Ø27	—	81	—	Spec sheet
250ADN250	20K	430	34	345	380	12 × Ø27	—	87	—	Spec sheet
250ADN250	30K	450	48	345	390	12 × Ø33	—	118	—	Spec sheet
300ADN300	5K	430	22	360	390	12 × Ø23	342	62	—	Spec sheet

REFERENCE

Pressure ratings, materials and tolerances

Transcribed from JIS B2220:2012 with table and page references.

Pressure-temperature ratings

JIS B2220 pressure–temperature ratings

Table 11 of JIS B2220:2012 is the rating table that turns a nominal JIS K number into a maximum working press…

Open reference Material groups

JIS B2220 material groups and ASTM reference materials

JIS B2220:2012 does not rate flanges by a steel name alone. It sorts materials into numbered groups and then …

Open reference Tolerances

JIS B2220 dimensional tolerances (Table 22)

Table 22 of JIS B2220:2012 sets the dimensional tolerances for steel pipe flanges, in millimetres. Clause 12.…

Open reference Marking

JIS B2220 marking requirements

Clause 20 of JIS B2220:2012 defines what a flange must carry: nominal pressure, nominal size and material sym…

Open reference Types and facings

JIS B2220 flange types and gasket faces

JIS B2220:2012 classifies flanges by shape and gives each type a short designation. Table 1 defines eight of …

Open reference

How to read the pressure class

JIS K ratings are kgf/cm² nominal: 5K ≈ 0.5 MPa, 10K ≈ 1.0 MPa, 16K ≈ 1.6 MPa, 20K ≈ 2.0 MPa and 30K ≈ 3.0 MPa. The published maximum working pressure is higher or lower than the nominal figure depending on material group and division — for material group 1.1, Division I, the JIS B2220 Table 11 value at up to 120 °C is 0.7 MPa for 5K, 1.4 MPa for 10K, 2.7 MPa for 16K, 3.4 MPa for 20K, 5.1 MPa for 30K, 6.8 MPa for 40K and 10.7 MPa for 63K. Allowable pressure falls with temperature, and JIS bolt patterns differ from ASME classes of similar pressure.

Edition and verification

Data imported 2026-11-05 08:05.