JIS B2220: 2012 20K Flange Dimensions & Standards

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

NOTES:

(1) Various types of weld preps are offered with this standard. Please confirm at enquiry.

BALCOMBE ENGINEERING P/L ...03 9554 0900..... www.baleng.com.au

JIS B2220: 2012 20K