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…

徐州镀锌方管市场价格暂稳。市场方面，今日期螺尾盘收尾盘收3266跌20，2001短线区间震荡运行；现货原料带钢带钢较昨回涨10-20，285-355系列高现货裸价主流 3350-3380，期货主流3340-3360；河北主导管厂镀锌方管出厂部分跟随上调30，现镀锌方管4寸(3.75mm)出厂报价在4490-5340 元之间。市场方面，徐州地区价格暂随行波动，市场库存依旧处于小幅下降的态势，方管厂家囤货意愿较小，对于当前阶段价格构成支撑；同时9月限产停工的传言开 始转发，提振心态及交投氛围。预计徐州地区镀锌方管市场销库为主。

Xuzhou galvanized square pipe market price is temporarily stable. On the market side, the end of today's screw-tail closing down 3266, down 20, 2001 short-term oscillation operation; spot raw material strip steel increased 10-20, 285-355 series high spot bare price mainstream 3350-3380, futures mainstream 3340-3360; Hebei leading pipe factory galvanized square pipe factory factory part followed up by an increase of 30, now galvanized square pipe 4 inches (3.75mm) factory report The price ranges from 4490 to 5340 yuan. On the market side, Xuzhou's price fluctuates temporarily, the stock in the market is still in a slight decline, and TRADERS'willingness to hoard goods is relatively small, which supports the price at the current stage. At the same time, rumors of production restriction and shutdown began to be transmitted in September to boost mentality and trading atmosphere. It is expected that the market of galvanized square tubes in Xuzhou will be dominated by sales warehouses. 原料方面，今日上游方坯持涨后价3340，现货3380左右含税出库个别有成交；唐山瑞丰355mm系列带钢出厂报价3650，较昨日主流价格上调20元。

In terms of raw materials, the upstream billet price is up 3340 today, and the spot price is about 3380, including tax. The Tangshan Ruifeng 355mm series strip steel ex-factory quotation is 3650, which is 20 yuan higher than the mainstream price yesterday.

价格方面：目前友发新国标产4寸(3.5mm)镀锌方管价格为4800(过磅含税价,下同)，正金元新国标产4寸(3.5mm)镀锌方管价格为4720元。

　　下周无锡镀锌方管市场或将小幅回涨按需补货本周无锡镀锌方管市场价格暂稳，整体成交欠佳。本周初起，期货、原料等上游市场持续下行，近两日有小幅回涨，整周处于震荡 运行状态。与上周相比，本周期货持续下行又触底小幅反弹，因此本周原材料市场价格有大幅下跌…