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外徑*壁厚	外徑*壁厚
20*3-4-5	45*3-4-5-6-7-8-9-10-12
22*3-4-5	48*3-4-5-6-7-8-9-10-12-14
23*3-4-5	50*3-4-5-6-7-8-9-10-12-14
24*3-4-5	54*3-4-5-6-7-8-9-10-12-14
25*3-4-5	57*3-4-5-6-7-8-9-10-12-14-16
26*3-4-5-6	60*3-4-5-6-7-8-9-10-12-14-16
27*3-4-5-6-7	63.5*3-4-5-6-7-8-9-10-12-14-16
28*3-4-5-6-7	65*3-4-5-6-7-8-9-10-12-14-16
30*3-4-5-6-7-8	68*3-4-5-6-7-8-9-10-12-14-16
32*3-4-5-6-7-8	70*3-4-5-6-7-8-9-10-12-14-16-18
34*3-4-5-6-7-8	73*4-5-6-7-8-9-10-12-14-16-18
35*3-4-5-6-7-8-9	76*3-4-5-6-7-8-9-10-12-14-16-18
36*3-4-5-6-7-8-9	80*4-5-6-7-8-9-10-12-14-16-18
38*3-4-5-6-7-8-9-10	83*4-5-6-7-8-9-10-12-14-16-18
40*3-4-5-6-7-8-9-10	89*5-6-7-8-9-10-12-14-16-18-20
42*3-4-5-6-7-8-9-10-12	95*5-6-7-8-9-10-12-14-16-18-20