唐山方管价格稳中窄幅调整运行成交仍无起色…方管唐山方管市场价格先强后弱。受昨日成交好转，钢坯上涨支撑，早盘唐山方管价格稳中趋高，但终端采购放缓，高位出货弱，盘中部分方管厂报价跌10，但成交仍无起色，截止16点统计唐山23家方管厂家共出货35000吨，较昨日下降53.3%。工字钢7家7200吨，槽钢12家11800吨，角钢5家16000吨。今日期螺窄幅震荡，钢坯持早…

南京方管市场价格微跌，市场整体成交一般。“五一”假期过后，期货、原料等上游市场一直处于一个窄幅震荡趋势，因此不 管上游还是下游操作均较为谨慎，虽管厂调价幅度并不大，多数贸易商挺价意愿也较强，但市场需求不佳，出货量一般，市场多数抱着观望态度，对近期市场行情并 不看好。库存方面，整体库存量减少缓慢，销售压力依旧不容小觑。价格方面，截至5月10日，南京市场唐山京华产新国标4寸（3.75mm）方管价格为4250元，6寸（4mm）方管价格为4450元。

Nanjing Fangguan market prices fell slightly, the overall market turnover is general. After the May 1st holiday, the upstream markets of futures and raw materials have been in a narrow fluctuation trend. Therefore, both upstream and downstream operations are more cautious. Although the range of price adjustment is not large and most traders are willing to bid more, the market demand is not good, the volume of shipments is general, and most of the markets hold a wait-and-see attitude and are not optimistic about the recent market. Inventory, the overall inventory decline is slow, sales pressure can not be underestimated. In terms of price, as of May 10, the price of 4-inch (3.75 mm) square tube and 6-inch (4 mm) square tube of Tangshan Jinghua New National Standard in Nanjing market were 4250 yuan and 4450 yuan respectively. 原料方面：唐山普碳150方坯报价3610元，比上周同期下跌20元；现唐山瑞丰产355mm系列带钢出厂价格为3870元，比上周同期下跌10元。

Raw materials: Tangshan Pucarbon 150 billet quoted 3610 yuan, 20 yuan lower than the same period last week; Tangshan Ruifeng 355mm series strip steel ex-factory price is 3870 yuan, 10 yuan lower than the same period last week.

管厂方面：现唐山友发产新国标4寸（3.75mm）方管过磅含税价4120元，于上周同期价格持平；唐山京华产4寸（3.75mm）方管过磅含税价4120元，比上周同期下调30元。

In terms of management plant: Tangshan Youfa now produces 4 inches (3.75 mm) square tube weighing with tax price of 4120 yuan, which was flat in the same period last week; Tangshan Jinghua 4 inches (3.75 mm) square tube weighing with tax price of 4120 yuan, 30 yuan lower than the same period last week.

整体来看，当前上游原料市场难掩震荡趋势，下游方管市场推涨乏力。预期下周南京方管市场将持续窄幅震荡运行。

Overall, the current upstream raw material market is difficult to hide the trend of shocks, and the downstream market is weak. It is expected that the Nanjing Square Management Market will continue to operate in a narrow range next week.

天津方管基本持稳的同时弱势运行出货量低位…方管本周天津方管市场涨跌两难。周内，本地天钢产热轧管坯价格和山东中小管厂出厂价平稳运行，受此影响，本地方管价 格调整的幅度并不大，仅仅窄幅波动。从市场了解到，临近年底多数终端方管厂家已无新增采购计划，因此市场上主流方管厂家日出货量低位平稳，保持在二、三吨到七、 八吨的水平，由于终端需求持续低迷、本地热轧管坯… 分析方管表面缺陷的五种检测方法方管方管表面缺陷的检测方法，主要有以下五种：一电涡流检测.电涡流检测有多种形式，常用的有常规涡流检测、远场涡流检测、多频涡流检测和脉冲涡流检测等，利用电涡流传感器对金属进行感应，方管表面不同缺陷类型和形状将产生不同类型的信号。其优点是检测精度高、探测灵敏度高，检测速度快，能检测待检测管材的表面及亚表面，且…