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BS 1640

INCHES					METRIC
N.B.	O.D. at Bevel	Length E*	Limiting wall Th. For E	Length E1	N.B..	O.D. At Bevel	Length E*	Limiting wall Th. For E	Length E1
3 4	1.05	1	0.15	1	20	26.67	25.4	3.91	25.4
1	1.32	1 1/2	0.18	1 1/2	25	33.4	38.1	4.55	38.1
1 1/4	1.66	1 1/2	0.19	1 1/2	32	42.16	38.1	4.85	38.1
1 1/2	1.9	1 1/2	0.2	1 1/2	40	48.26	38.1	5.08	38.1
2	2.38	1 1/2	0.22	1 3/4	50	60.33	38.1	5.54	44.45
2 1/2	2.88	1 1/2	0.28	2	65	73.03	38.1	7.01	50.8
3	3.5	2	0.3	2 1/2	80	88.9	50.8	7.62	63.5
3 1/2	4	2 1/2	0.32	3	90	101.6	63.5	8.08	76.2
4	4.5	2 1/2	0.34	3	100	114.3	63.5	8.56	76.2
5	5.56	3	0.38	3 1/2	125	141.3	76.2	9.53	88.9
6	6.63	3 1/2	0.43	4	150	168.28	88.9	10.97	101.6
8	8.63	4	0.5	5	200	219.08	101.6	12.7	127
10	10.75	5	0.5	6	250	273.05	127	12.7	152.4
12	12.75	6	0.5	7	300	323.85	152.4	12.7	177.8
14	14	6 1/2	0.5	7 1/2	350	355.6	165.1	12.7	190.5
16	16	7	0.5	8	400	406.4	177.8	12.7	203.2
18	18	8	0.5	9	450	457.2	203.2	12.7	228.6
20	20	9	0.5	10	500	508	228.6	12.7	254
22	22	10	0.5	10	550	558.8	254	12.7	254
24	24	10 1/2	0.5	12	600	609.6	266.7	12.7	304.8

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