方管市场价格暂且随行运行厂家执行停产限产…方管石家庄方管市价持稳观望。市场方面，今日螺纹钢期货2005合约高位震荡，最高3549最低3508，尾盘收3538涨23，仓量270万手，增11.2万手。原料钢坯 3410左右含税出库低价部分成交，带钢145mm系降后低位好转；355mm系列现货昨降20左右，裸价主流3370-3410，期货 3340-3370左右；河北主导方管厂家现方管4寸(3.75mm)…

小口径方管用作炼钢吹氧用管，冶炼吹氧用钢管一般用焊接钢管，规格由3/8寸-2寸八种。用或Q195-Q235钢带制成。为防蚀，有的进行渗铝处理。是在S系列产品基础上研制而成，天津吹氧管，结合了当前电弧炉炼钢的实际需要，耐火度高、消耗量少、操作方便等特点。电弧炉炼钢中输送氧气或其它气体，在电弧炉内熔化并精炼钢铁。

Small caliber square pipe is used as oxygen blowing pipe in steelmaking. Welded steel pipe is generally used for oxygen blowing pipe in steelmaking. The specifications range from 3/8 inch to 2 inch. Made of or Q195-Q235 steel strip. In order to prevent corrosion, some are aluminized. It is developed on the basis of S series products. Tianjin oxygen blowing pipe combines the actual needs of electric arc furnace steelmaking. It has the characteristics of high refractory, low consumption and easy operation. In electric arc furnace steelmaking, oxygen or other gases are transported to melt and refine steel in the electric arc furnace. 小口径方管冶炼吹氧用钢管按焊接方法不同可分为电弧方管、高频或低频电阻方管。电焊钢管用于石油钻采和机械制造业等，可用作水煤气管等，大口径直缝方管用于高压油气输送。吹氧管厂家生产的扩口吹氧管，强度一般比直缝方管高，能用较窄的坯料生产管径较大的方管，还可以用同样宽度的坯料生产管径不同的方管。但是与相同长度的直缝管相比，焊缝长度增加30~100%，而且生产速度较低。因此，较小口径的方管大都采用小口径方管，大口径方管则大多采用螺旋焊。

Small caliber square pipe for oxygen blowing can be divided into arc square pipe, high frequency resistance square pipe or low frequency resistance square pipe according to different welding methods. Welded steel pipes are used in oil drilling and mechanical manufacturing, water gas pipes, etc. Large diameter straight seam square pipes are used for high pressure oil and gas transmission. Oxygen blowing tube manufacturer's enlarged oxygen blowing tube has higher strength than straight slotted square tube. It can produce square tube with bigger diameter with narrower blank, and can also produce tube with different diameter with the same width blank. However, compared with the straight seam pipe of the same length, the length of the weld increases by 30-100%, and the production speed is lower. Therefore, the small diameter square pipe is mostly used, while the large diameter square pipe is mostly spiral welded.

广州市场方管价格或继续稳中偏弱调整成交水…方管广州市场方管价格稳中偏弱运行，市场成交一般，方管厂家出货从昨日开始整体有所减弱。期货今日震荡盘整尾盘小幅收红，原材料方面现昌黎普碳方 坯含税出厂3300元/吨降10。现货市场今日广州方管开价螺纹资源主流小幅下调10元出货，盘螺高线资源报价相对稳定；成交方面据方管厂家反馈经过周五周六的小幅放量，周一市场出货开始有… 上海方管价格小幅下跌走量比前日有所见长方管上海方管价格小幅下跌。据了解近段时间的降价主要需求方面占较大因素，下游拿货比前期有所进展，终端成交有多多少少的增长。今日早盘开市多数商家报价纷纷出现上涨趋势， 有些方管厂家发现成交及其不佳，驱使方管厂家调整价格产生降价状态，幅度在20-30元左右。钢厂到货一直比较正常，方管厂家手中库存小幅减小。据本地部分方…