亚洲精品免费播放_日韩精品中午字幕_久久久久看片_制服丝袜专区在线_宅男深夜视频_91高清视频免费观看_欧美午夜片在线看_不卡欧美aaaaa_久操国产精品_岛国大片在线观看

最全國標熱鍍鋅無縫鋼管理論重量表

外徑	2	2.75	3.5	4	4.5	5	5.5	6	6.5	7	7.5
10	0.395	0.492	0.561	0.591
14	0.592	0.763	0.813	0.986
17	0.739	0.966	1.165	1.282	1.387
21	0.937	1.238	1.51	1.676	1.831	1.972
27	1.233	1.645	2.028	2.269	2.497	2.712	2.916
34	1.578	2.119	2.632	2.959	3.273	3.576	3.865	4.143
42	1.973	2.662	3.323	3.748	4.161	4.562	4.95	5.327	5.69
45	2.121	2.865	3.582	4.044	4.494	4.932	5.357	5.77	6.171	6.559
48	2.269	3.069	3.841	4.34	4.827	5.3	5.764	6.214	6.652	7.077	7.49
50	2.367	3.204	4.013	4.537	5.046	5.549	6.036	6.51	6.973	7.423	7.86
51			4.099	4.636	5.16	5.672	6.171	6.658	7.133	7.595	8.045
54			4.888	4.932	5.493	6.042	6.578	7.102	7.614	8.113	8.6
57			4.618	5.228	5.826	6.412	6.985	7.546	8.095	8.631	9.155
60			4.877	5.523	6.159	6.782	7.392	7.989	8.576	9.149	9.709
70			5.739	6.51	7.269	8.015	8.748	9.469	10.178	10.875	11.559
73			5.999	6.806	7.601	8.384	9.155	9.913	10.659	11.393	12.114
76			60256	7.102	7.934	8.754	9.562	10.357	11.14	11.911	12.669
89			7.121	8.384	9.377	10.357	11.325	12.281	13.224	14.155	15.073
114			9.537	10.85	12.151	13.439	14.716	15.979	17.231	18.47	19.697
140			11.781	13.415	15.036	16.646	18.242	19.827	21.399	22.958	24.506
165			13.939	15.881	17.811	19.728	21.633	23.525	25.406	27.274	29.129

   鍍鋅無縫鋼管分冷鍍管、熱鍍管，前者已被禁用，后者還被國家提倡暫時能用.
   鍍鋅無縫鋼管理論重量公式：（直徑—壁厚）x壁厚x0.02466*1.0599=每米重量（公斤/米）