Nominal size			B	Ｌ
Ａ	Ｂ	Wall Thickness
8	1/4	S80	23	17.9
10	3/8	S80	28	20.9
15	1/2	S80	33	24.1
20	3/4	S80	38	28.7
25	1	S80	47	30.3
32	11/4	S80	57	35.5
40	11/2	S80	64	39.6
50	2	S80	77	47.4
65	21/2	S80	96	54.6
80	3	S80	110	60.8
15	1/2	S160	38	28.7
20	3/4	S160	47	30.3
25	1	S160	57	35.5
32	11/4	S160	64	39.6
40	11/2	S160	77	47.4
50	2	S160	91	51.6
65	21/2	S160	110	59.8
80	3	S160	120	65.9