上海方管价格持稳运行厂家多已出货为主方管上海方管价格持稳运行，市场方面，今本地市价主流稳中偏弱运行，目前方管市场需求整体一般，成交相对偏弱。由于当前南北热轧方管库存均偏低，五月以来下游需求有萎缩迹象，方管厂家多已出货为主。不过库存资源相对不多，商家出货压力不大，市场价格比较稳健。目前市场供需处于平衡，方管厂家多持观望态度。考…

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. 

北京方管市场价格以稳为主成交量明显不足方管本周北京方管市场价格以稳为主。截至27日，北京市螺线沙龙批量成交指导价 格：Φ8-10mm高线为4270元(吨价，下同)，比上周持平。河钢集团产Φ12mm三级抗震螺纹钢为3620元，比上周降20元；Φ25mm三级螺钢 为3650元，比上周降20元。 期货市场先抑后扬，幅度有限持续处在较窄的箱体震荡中；而期螺没有明确方向也给现货市场难… 广州当地方管价格或趋弱调整以出货成交为主…方管广州市场方管价格以稳为主。今日期螺高位震荡宽幅下行，原材料方面现昌黎普碳方坯含税出厂3500跌10。今日广州当地又开始强降 雨，周边地区积水严重影响建设单位的施工进程，故今日市场成交较昨天明显收缩，价格维稳可议，以出货成交为主。目前供需基本面变化不大，主要影响因素还是 雨季对需求的抑制，市场普遍对后市消极，在…