预计明日国内方管或将震荡趋强厂家销售压力…方管方管市场价格窄幅上行，今日唐山小窄带开盘持稳，随后交投开始活跃，因此小窄带生产厂家盘中追涨10，今日期货市场震荡走高，唐山普方坯市 场更是步步追涨，小窄带市场属于被动增长的状态，但从今日成交量来看，多数方管厂家出清日产。唐山窄带及中宽带涨10，今日央行开展4000亿元MLF操作， 利率下降5个基点，…

无缝方管是由无缝钢管冷拔挤压成型的方型钢管，并非直出的焊接方管，而焊接方管也称焊管，是用钢板或带钢经过卷曲成型后焊接制成的方管。焊接方管生产工艺简单，生产效率高，品种规格多，设备资少， 常用材质为：Q235A，Q235C。

Seamless square pipe is a square pipe formed by cold-drawing and extrusion of seamless steel pipe, not a straight welded square pipe. Welded square pipe, also known as welded pipe, is a square pipe made of steel plate or strip steel after curling and forming. Welded square pipe has the advantages of simple production process, high production efficiency, many varieties and specifications, and less equipment. Commonly used materials are Q235A and Q235C. 

一、焊接方管是一种空心方形截面型钢方管,也称为空心冷弯型钢.它是以热轧或冷轧带钢或卷板为坯料经冷弯曲加工成型后再经高频焊接制成的方形截面形状尺寸的型钢。

1. Welded square pipe is a hollow square section steel square pipe, also known as hollow cold-formed steel. It is a square section shape and size steel made by hot-rolled or cold-rolled strip or coil plate after cold bending processing and high frequency welding. 

厚壁方管除壁厚增厚外情况,其角部尺寸和边部平直度均达到甚至超过电阻焊冷成型方管的水平，R角的大小一般是壁厚的2倍-3倍之间.也可以根据客户的需要，生产客户所需大小的R角方管；

In addition to wall thickness, the corner size and flatness of thick-walled square tubes reach or even exceed the level of resistance welding cold-formed square tubes. The size of R angle is generally between two and three times of wall thickness. The R angle can also be manufactured according to the needs of customers. 

二、无缝方管是一种具有中空截面、周边没有接缝的长条钢材.是用无缝管通过模具的4面挤压形成的方管，方管具有中空截面,大量用作输送流体的管道.主要应用于液体输送,液压支架,机械结构,中低压.高压锅炉管,热交换管,气体.石油等行业.他比焊接的更坚固，不会出现裂缝。

2. Seamless square pipe is a kind of long steel with hollow section and no seams around it. It is a square pipe formed by extrusion of seamless pipe through four sides of the die. The square pipe has hollow section and is widely used as a pipeline for conveying fluid. It is mainly used in liquid conveying, hydraulic support, mechanical structure, medium and low pressure, high pressure boiler pipe, heat exchange pipe, gas, oil and other industries. It is stronger than welding and will not. Cracks appeared. 

天津镀锌方管或将继续震荡调整格局厂家出货…方管本周天津镀锌方管市场价格震荡走低，成交方面依旧较为疲软。周初至周中，原料方坯、带钢价格有所反弹，虽然幅度不大，但是 也给跌跌不休的钢市注入了些许新鲜活力，受此影响，本地镀锌方管市场价格小幅走高。周后期，随着原料成本支撑度继续削弱，市场中观望情绪浓厚，本地镀锌方管市 场价格呈现弱稳态势。据了解，由于需求羸… 郑州镀锌方管市场价格小幅上涨厂家观望较多…方管今日郑州镀锌方管市场价格小幅上涨，价格方面，今日济钢产Φ18-25mm镀锌方管报价3900元；晋钢产Φ18-25mm镀锌方管报价3870元；信钢产Φ8-10mm方管报价4140元。周初期螺方面早盘冲高回落，市场价格暂稳运行，市场反馈成交偏弱，出货较为一般。周中市场价格偏稳运行，现货下游需求积极性不强，对市场出货有一定的影响，期螺震荡…