购买方管时最实用的三种方管理论重量计算方…方管方管的三种理论重量算法：关于方管的重量的计算方法，总共有三种方式。第一种，就是用钢板算法，也就是，将一个正跟的方管展开，然后形成一个四片扁钢，然后在对扁钢进行计算。这种计算方法计算出来的重量，会与实际的方管的重量有比较大的差异，比实际的重量重。因为，这种方法会把中间重叠的部分的重量计算…

本周中南地区镀锌方管市场价格震荡向下，市场方面，本周周一受原料拉涨影响镀锌方管价格小幅跟涨外，周二到周五镀锌方管价格开始震荡下行。31日，关于唐山6月份环保限产措施出版，限产或对 原料钢坯价格形成一定支撑，然6月份中南各地将进入季节性需求淡季，下游终端对镀锌方管消耗将放缓，或对成品材价格形成一定压力。五月份产量继续维持高位， 供应压力不减。整体来看，利空笼罩整个市场，悲观情绪蔓延，商家普遍看空后市。预计下周中南地区镀锌方管价格震荡偏弱运行。

This week, the price of galvanized square tubes in central and southern China has been fluctuating downward. On the market side, the price of galvanized square tubes started to oscillate downward from Tuesday to Friday, except that the price of galvanized square tubes rose slightly on Monday due to the pulling up of raw materials. On June 31st, the publication of Tangshan's environmental measures for production restriction in June will support the production restriction or the price of raw steel billets. However, the seasonal off-season demand in June will enter all parts of central and southern China. The consumption of galvanized square tubes at downstream terminals will slow down, or pressure will be exerted on the price of finished products. Production remained high in May and supply pressure remained constant. On the whole, the market is shrouded by bad news, and pessimism spreads. Businessmen are generally short of the future market. It is expected that the price fluctuation of galvanized square tubes in central and southern China will be weak next week.

天津唐山邯郸主要管厂统计：本周(5.30)厂内原料带钢库存30.4万吨，比上周同期降2.35万吨；镀锌方管库存8.4万吨，比上周增0.25万 吨；镀锌方管库存19.7万吨，比上周同期增1.5万吨；日均成交量4.97万吨，比上周同期减0.42万吨。另兰格网本周钢坯库存调查：据统计31日唐山 主要仓库钢坯库存约20.8万吨，较上期(24日)降2.5万吨，象屿库库存保持在10万吨以下。

Tianjin Tangshan Handan main pipe factory statistics: this week (53,000 tons) factory stock of raw material strip steel, 23,500 tons lower than the same period last week; galvanized square pipe inventory 84,000 tons, an increase of 0.25 million tons than last week; galvanized square pipe inventory 19.7 million tons, an increase of 15,000 tons over the same period last week; daily turnover of 49,700 tons, a decrease of 0.42 million tons over the same period last week. According to statistics, the stock of billets in Tangshan's main warehouses was about 208,000 tons on 31st, down 25,000 tons from the previous period (24 days), and the stock in Xiangyu warehouse was kept below 100,000 tons.

价格方面：截至发稿，现郑州本地4寸(3.75)镀锌方管 均价4810元(过磅价，下同)，较上周跌30元；武汉4寸(3.75mm)镀锌方管均价为4950元，较上周跌60元；长沙4寸(3.75mm)镀锌方管均 价5250元，较上周跌80元；广州4寸(3.75mm)镀锌方管均价为5602元，较上周跌20元；南宁4寸(3.75mm)镀锌方管均价为4960元，较 上周跌40元；海口4寸(3.75mm)镀锌方管均价为5525元，与上周持平。

Price: Up to submission, the average price of 4-inch (3.75) galvanized square tubes in Zhengzhou is 4810 yuan (pound price, the same below), 30 yuan lower than last week; the average price of 4-inch (3.75 mm) galvanized square tubes in Wuhan is 4950 yuan, 60 yuan lower than last week; the average price of 4-inch (3.75 mm) galvanized square tubes in Changsha is 5250 yuan, 80 yuan lower than last week; the average price of 4-inch (3.75 mm) galvanized square tubes in Guangzhou is 5602 yuan, 20 yuan lower than last week; and the average price of 4-inch (3.75 mm) galvanized square tubes in Nanning is 20 yuan lower than last week. The average price of galvanized square tubes was 4960 yuan, 40 yuan lower than last week; the average price of 4-inch (3.75 mm) galvanized square tubes in Haikou was 5525 yuan, which was the same as last week. 

天津的方管市场或坚挺盘整成交方面有所下量…方管本周初虽期货表现震荡局面，但天津方管市场在低库存的支撑下，价格呈现趋强态势，不过由于节假日氛围浓厚，市场交投氛围受到一定影响，下游采购端 需求减弱，成交方面有所下量。周二市场价格基本持稳，部分报价略有调整，但需求及供应端无有效改善，因此整体成交相对一般。中后期受央行降准利好影响，期 货高位运行，对市场情… 本周北京方管出货没有改善厂家心态暂且平稳…方管本周北京方管出货没有改善，加之消息面利空占据主导，致使市场成交不佳，贸易商操作偏于下调。14-25mm敬业方管3860(吨价，下同)，天钢3850元，14-25mm锰板4060元，较上周同期下跌30元。结算过后，市场价格临近呈 现加速回落走势，8月份北京方管开门黑。周初开盘，受期货及外围市场下跌带动，本地敬业相对高价的敬业资源小幅下…