Gasket Size For JIS pipe flanges

JIS B 2220-2012 “Steel Pipe Flanges”

JIS 巳 2239-2004 “Cast Iron Pipe Flanges11

JIS B JIS B 22402006 “Copper Alloy Pipe Flanges”

JIS B 2241-2006 “Aluminium alloy pipe flanges”

JAS Standard Gasket Size

Nominal diameter	I.D. of Di	For full-face seat, large flat seat, and small flat seat flanges
		Gasket O.D. D2
		Nominal	Nominal	Nominal	Thin flange nominal pressure 10K	Nominal	Nominal	Nominal	Nominal	Nominal
		pressure	pressure	pressure		pressure	pressure	pressure	pressure	pressure
		2K	5K	10K		16K	20K	30K	40K	63K
10A	18	–	45	53	55	53	53	59	59	64
15	22	–	50	58	60	58	58	64	64	69
20	28	—	55	63	65	63	63	69	69	75
25	35	–	65	74	78	74	74	79	79	80
32	43	—	78	84	88	84	84	89	89	90
40	49	–	83	89	93	89	89	100	100	108
50	61	–	93	104	108	104	104	114	114	125
65	84〔77〕	—	118	124	128	124	124	140	140	153
80	90	–	129	134	138	140	140	150	150	163
90	102	—	139	144	148	150	150	163	163	181
100	115	–	149	159	163	165	165	173	183	196
125	141	–	184	190	194	203	203	208	226	235
150	167	–	214	220	224	238	238	251	265	275
175	192	–	240	245	249	–	–	–	–	–
200	218	–	260	270	274	283	283	296	315	330
225	244	–	285	290	294	–	–	–	–	–
250	270	–	325	333	335	356	356	360	380	394
300	321	–	370	378	380	406	406	420	434	449
350	359	–	413	423	425	450	450	465	479	488
400	410	–	473	486	488	510	510	524	534	548
450	460	535	533	541	–	575	575	–	–	–
500	513	585	583	596	–	630	630	–	–	–
550	564	643	641	650	–	684	684	–	–	–
600	615	693	691	700	–	734	734	–	–	–
650	667	748	746	750	–	784	805	–	–	–
700	718	798	796	810	–	836	855	–	–	–
750	770	856	850	870	–	896	918	–	–	–
800	820	906	900	920	–	945	978	–	–	–
850	872	956	950	970	–	995	1.038	–	–	–
900	923	1,006	1,000	1,020	–	1,045	1,088	–	–	–
1	1,025	1,106	1,100	1,124	–	1,158	–	–	–	–
1,100	1,130	1,216	1,210	1,234	–	1,258	–	–	–	–
1,200	1,230	1,326	1.32	1,344	–	1,368	–	–	–	–
1,300	1,335	–	–	–	–	1,474	–	–	–	–
1,350	1,385	1,481	1,475	1,498	–	1,534	–	–	–	–
1,400	1,435	–	–	–	–	1,584	–	–	–	–
1,500	1,540	1,636	1,630	1,658	—	1,694	—	—	—	—