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383…

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.

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：友发新国标产1.5… 下周唐山方管价格或将呈弱势调整方管厂家降…方管周初开市，期螺低开，全天低位运行，方管市场成交差，市场情绪普遍低落，方管厂家降价销售，。周中期，随着中美磋商的进行，期螺强势翻红，市场信心受到提 振，不过在午后传出中美磋商“不欢而散”的消息后，期货毫不犹豫的再次走低美联储降息，股市、期货全部泛绿，市场悲观气氛骤增。周后期，特朗普再放对中国 产品加征关税…