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…

方管市场价格稳中趋强。成交方面看，今日出货清淡，邯郸千吨级大户出货在200吨左右，上海乐从500吨左右，南方出货较北方稍强。值得一提的是，由于北方需求不佳，目前北材南下进程有所提前，而南方地区近期又出现台风暴雨侵袭，成交堪忧。预计明日国内方管价格或有小幅回落可能。

Square management market prices are stabilizing and becoming stronger. In terms of transaction, today's shipment is light. Handan's large 1000-ton shipments are around 200 tons, Shanghai's Lecong 500 tons, and southern shipments are slightly stronger than northern shipments. It is worth mentioning that due to the poor demand in the north, the process of northbound timber moving southward has been ahead of schedule, and the recent typhoon rainstorm in the southern region has attacked, and the transaction is worrying. It is anticipated that there will be a slight drop in domestic prices tomorrow. 昨日夜盘，期货挖坑回调，早盘再次拉涨，带动天津、上海等地价格小涨10-20元，而邯郸、上海等地则企稳观望。今日开盘后，期货高位震荡，较昨 日的大幅拉涨，今日则呈现压力。今日期螺收于3746元，较昨日涨41元，维持高位的主要原因或在于地方债的提前下达。另外，唐山丰南区的二阶段环保管控 文件发布，较一阶段有所松动，也给与空头炒作题材，今日尾盘价格出现回落。

Yesterday evening, futures digging hole callback, early market rallied again, driving prices in Tianjin, Shanghai and other places up by 10-20 yuan, while Handan, Shanghai and other places are stable and wait-and-see. After the opening of today's market, futures high volatility, compared with yesterday's sharp rise, today is pressured. Today's snails closed at 3,746 yuan, up 41 yuan from yesterday's. The main reason for maintaining the high level may lie in the early issuance of local debt. In addition, the release of the second-stage environmental protection control documents in Fengnan District of Tangshan was looser than that in the first stage, and it also gave short-term speculation. Today's final price has fallen.

方管价格方面，国内方管卷板均价3715元(吨价，下同)，较昨日上涨8元，较上周同期上涨37元。

In terms of square tube prices, the average price of domestic pipe coiled sheets is 3715 yuan (ton price, the same below), up 8 yuan from yesterday and 37 yuan from the same period last week.

临沂镀锌方管市场继续盘整运行厂家多持续企…方管临沂镀锌方管市场报价维持观望。市场方面，今日螺纹钢期货2005合约午收3540，贴水294元/吨，整体走势震荡格局。原料钢坯3400左右含税出库低价有成交，带钢145mm系部分 出清；355mm系列现货昨降5-15左右，裸价主流3330-3370；河北主导管厂现方管4寸(3.75mm)出厂报价在3880-4040之间，现 唐山当地方管市场价3830，名义利润30元… 苏州镀锌方管价格或暂稳观望运行为主厂家心…方管苏州镀锌方管市场价格暂稳。今日上游原材料市场价格、管厂出厂价格均有小幅上涨，近期苏州镀锌方管市场价格暂未调整，整体成交欠佳。据了解，受季节性影响，近期市场活跃度仍 然较低，下游市场需求疲软，客户采购意向弱。方管厂家心态偏悲观，观望情绪浓厚。库存方面持续低位水平运行，按需补货，操作谨慎。整体来看，预计短…