九色视频免费看亚洲国产一久网摸|伊人影院222人妻在线无码专区|亚洲一区图片区丁香五月天 婷婷|日本XXXX大陆国产精品精品久久|亚洲精品无码少妇亚洲无码久久AV|91孕妇在线色橹橹在线视频|五月婷婷激情狠狠干天天搞|日韩AV中文无码高清综合

最全國(guó)標(biāo)熱鍍鋅無(wú)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(wú)縫鋼管分冷鍍管、熱鍍管，前者已被禁用，后者還被國(guó)家提倡暫時(shí)能用.
   鍍鋅無(wú)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）