国内方管市场价格趋稳运行厂家观望心态较浓…方管今日方管市场价格跌幅收窄。早间开盘期螺震荡走高翻红，但是因近期市场需求持续疲软，方管厂家观望心态较浓，北方重点城市唐山方管市场价格弱稳调 整。现在唐山型钢市场价格整体都是在低位调整，今日唐山解除重污染II级应急响应，轧方管厂家已经陆续开始复产，低位资源成交也有所好转。南方市场方管厂家心态悲…

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.

国内方管价格将持续稳中上调运行为主厂家交…方管本周镀锌方管市场价格盘整运行，镀锌方管市场价格出现上涨趋势。本周周初，北方地区民营钢厂经过上周持续拉涨，开始小幅回 落，跌幅在20元/吨。国营钢厂价格基本暂稳运行。周初市场经历了上周的集中放量之后，下游采购的客户明显减少。据方管厂家反馈，天津市场大户成交量在 800吨上下。南方地区上海市场成交量一般，方管厂家… 方管市场价格稳中有降厂家反馈出货一般方管方管市场价格稳中有降。主导市场，北京、天津、上海、广州均出现下降。期螺夜盘保持了高位走势，不过早盘在多头强势发力后开始走弱， 消息面没有新的利好支撑，盘面走势不佳，所以今日开市，市场价格稳中有降。午后盘面低位震荡，没有继续下行，但现货市场却持续走弱。从市场了解到，北京午 后追降20-30，螺纹主流价格降至35…