午夜天堂精品久久久久_欧美性受XXXX黑人XYX性爽_好男人WWW神马视频在线观看_公媳电影在线观看_国产精品久久777777网站

DN300鋼管重量 35crmo無縫鋼管重量

DN300鋼管重量計算公式（外徑-壁厚）*壁厚*0.02466=kg/(每米)

外徑(毫米)	壁  厚（毫米）
	8	8.5	9	9.5	10	11	12	13	14	15
	理論重量（公斤/米）
299	57.41	60.89	64.37	67.83	71.27	78.13	84.93	91.69	98.40	105.06
325	62.54	66.35	70.14	73.92	77.68	85.18	92.63	100.03	107.38	114.68
351	67.67	71.80	75.91	80.01	84.10	92.23	100.32	108.36	116.35	124.29
377	-	-	81.68	86.10	90.51	99.29	108.02	117.00	125.33	133.91
402	-	-	87.21	91.95	96.67	106.06	115.41	124.71	133.94	143.15
426	-	-	92.55	97.57	102.59	112.58	122.52	132.41	142.25	152.04
450	-	-	97.87	103.20	108.50	119.08	130.61	140.09	150.52	160.90
(465)	-	-	101.10	116.48	112.20	123.15	134.05	144.90	155.70	166.46
480	-	-	104.52	110.22	115.90	127.22	139.49	149.71	160.88	172.00
500	-	-	108.96	114.91	120.83	132.65	145.41	156.12	167.79	179.40
530	-	-	115.62	121.94	128.83	140.78	154.29	165.74	178.14	190.50
(550)	-	-	120.07	126.62	133.10	146.21	159.20	172.15	185.05	197.90
560	-	-	122.28	128.97	135.63	148.92	163.16	175.36	188.50	201.60
600	-	-	131.17	138.34	145.50	159.78	175.00	188.18	202.31	216.39
630	-	-	137.81	145.36	152.89	167.91	183.88	197.80	212.67	227.49