分析方管表面缺陷的五种检测方法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…

南京市场方管价格上涨，成交尚可。早盘螺纹钢期货延续夜盘强势上涨。唐山方坯累涨20元，现普碳方坯含税出厂3580元。期螺的大 涨也拉动了现货，南京市场价格多次跟涨，成交也相对顺畅。整体来看，需求对价格依然有很好的支撑，但是高价资源成交仍然较弱。不过由于期螺和钢坯的上涨， 钢厂涨价意愿强烈。综上所述，预计明日南京市场方管价格或持续上涨。

Nanjing market manages the price to rise, the transaction is still acceptable. Early-trading threaded steel futures continued the strong rise of the night market. Tangshan billet has risen by 20 yuan, and now ordinary carbon billet has been discharged with tax of 3580 yuan. The sharp rise of futures snails has also stimulated the spot market. Nanjing market prices have been rising many times, and transactions have been relatively smooth. Overall, demand still has a good support for prices, but the transaction of high-price resources is still weak. However, due to the rise of snails and billets, steel mills are willing to increase prices. To sum up, it is expected that prices will continue to rise in Nanjing market tomorrow. 价格方面：截止发稿时，永钢、沙钢三级大螺纹4270元(吨价，下同)，涨40元。

Price: Up to the time of submission, Yonggang and Shagang three-level large threads 4270 yuan (ton price, the same below), up 40 yuan.

　　明日国内方管或将震荡趋强运行厂家信心稍显不足…方管市场价格上行为主，今日唐山小窄带开盘都较为活跃。受盘面影响，下游心态好转，同时唐山部分地区限产逐渐解除，下游架子管厂逐渐复产，因此 小窄带成交较前几日好转，厂家累涨40，涨后高位成交一般，部分钢厂出清…