แหวนเหล็ก JIS/10 (BACKING RING JIS/10)

Flange DN (mm)	Pipe Size		OD   (mm)	ID   (mm)	PCD   (mm)	H   (mm)	Bolts
							d (mm)	Thread Size	Number
	(mm)	(inch)
15	20	1/2	95	31	70	12	15	M12 (1/2”)	4
20	25	3/4	100	36	75	14
25	32	1	125	43	90		19	M16 (5/8”)
32	40	1 1/4	135	53	100	16
40	50	1 1/2	140	64	105
50	63	2	155	78	120
65	75	2 1/2	175	91	140	18
80	90	3	185	108	150				8
100	110	4	210	128	175
	125	–		135
125	140	5	250	158	210	20	23	M20 (3/4”)
150	160	6	280	178	240	22
	180	–		188
200	200	–	330	235	290				12
	225	8		238
250	250	–	400	288	355	24	25	M22 (7/8”)
	280	10		294
300	315	12	445	338	400				16
350	355	–	490	376	445	26
400	400	–	560	430	510	28	27	M24 (1”)
450(1)	450	18	620	483	565	30			20
500	450	18	675	517	620
	500	–		533
550(1)	560	22	745	596	680	32	33	M30 (11/2”)
600	560	22	795	618	730				24
	630	–		645
700	710	–	905	740	840	34