福州方管市场价格随行阴跌厂家还是出货为主…方管福州方管市场价格随行阴跌。市场方面，福州当地方管厂家价格政策下调30元，方管市场外地资源也随行阴跌，方管市场目前还是出货为主，视情况再斟酌后期冬储。预计 本地市场价格偏弱运行。原料方面，今日上游昌黎部分钢坯上调10报3310；唐山瑞丰355mm系列方管出厂报价3640，较昨日主流价格下调10元。价格方面：…

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. 

本周北京方管出货没有改善厂家心态暂且平稳…方管本周北京方管出货没有改善，加之消息面利空占据主导，致使市场成交不佳，贸易商操作偏于下调。14-25mm敬业方管3860(吨价，下同)，天钢3850元，14-25mm锰板4060元，较上周同期下跌30元。结算过后，市场价格临近呈 现加速回落走势，8月份北京方管开门黑。周初开盘，受期货及外围市场下跌带动，本地敬业相对高价的敬业资源小幅下… 天津的方管市场或坚挺盘整成交方面有所下量…方管本周初虽期货表现震荡局面，但天津方管市场在低库存的支撑下，价格呈现趋强态势，不过由于节假日氛围浓厚，市场交投氛围受到一定影响，下游采购端 需求减弱，成交方面有所下量。周二市场价格基本持稳，部分报价略有调整，但需求及供应端无有效改善，因此整体成交相对一般。中后期受央行降准利好影响，期 货高位运行，对市场情…