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…

宝鸡市场方管价格主流价格继续下跌20元/吨，方管市场需求偏弱。上周国内主流市场方管价格小幅下跌时，宝鸡市场方管厂家对方管价格持稳，但 随着月底临近，方管厂家出货意愿增强，价格上做出让利。资源方面，五月整体资源到货情况尚可，各材质规格齐全，市场库存也小幅增加。关于后市，商家表示方管 表观消费数据增幅收窄，阶段性需求有下滑可能，操作上随行就市为主。短期内宝鸡市场方管价格或偏弱震荡为主。

The mainstream price of Baoji market has continued to fall by 20 yuan/ton, while the market demand of Baoji market is weak. Last week, when the price of square tube fell slightly in the mainstream domestic market, the price of square tube manufacturers remained stable in Baoji market. However, as the end of the month approached, the willingness of square tube manufacturers to ship goods increased and the price made concessions. In terms of resources, the overall arrival of resources in May is still acceptable, the material specifications are complete, and the market inventory has increased slightly. Regarding the future market, the merchants said that the growth rate of the apparent consumption data of the party management was narrowed, and the periodic demand was likely to decline, and the operation was mainly along with the market. In the short term, Baoji market is dominated by price or weak shocks.

价格方面：主导钢厂14-25普方管报价4080元/吨，低合金方管报价4260元/吨。

Price: Leading steel plant 14-25 square tube price 4080 yuan/ton, low alloy square tube price 4260 yuan/ton. 

天津方管已提前进入“春节”模式厂家大都在…方管本周天津方管市场已提前进入“春节”模式。对于节前供需来看，短期受原料价格稳中偏强影响，方管厂家吨钢毛利小幅下降，加之受采暖季政策影响，方管厂家在 春节前或维持目前的生产状态，节前市场到货有限，而钢厂为了保证利润，短期或许会有挺价动作，对市场价格可能会有影响。而需求方面，随着春节的临近，终端 需求会进一步… 本周天津方管市场价格以稳为主厂家谨慎操作…方管本周天津方管市场价格以稳为主，成交较为清淡。周内，本地天钢产热轧管坯Φ50-75价格小幅走 低，目前报3800元。考虑到市场交投氛围并不活跃，盲目下调报价只会让需求流失的更多，因此本地方管市场以稳为主。据了解，目前市场仍然处于一个进退 两难的境地，一方面，一月中旬过后下游需求将大幅回落，贸易商将面临出货较难的情…