郑州镀锌方管市场价格小幅下降库存增加明显…方管本周郑州镀锌方管市场价格小幅下降，距离农历新年已经越来越近，本地的工地开始陆续进入停工状态，对于方管的需求量开始下降，方管库存量开始回升。上半周市场价格降幅较大，虽成本端坚挺，但年关逼近且下游陆续放假，受需求拖累，焊管、镀锌方管涨势后劲不足。预计下周本地镀锌方管市场价格窄幅震荡。方管市…

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.

河北地区镀锌方管出厂报价上调60-100元不等…方管镀锌方管价格继续追涨。周末唐山突发的限产通知又让钢市炸开了锅，与以往不同的是此次限产力度较大且要求24日环保组进驻钢铁企业督促企业6月27日之前停限产到位，目前方管厂家基本接到相关通知。受其消息带动加之地方债发行创年内新高的消息，钢坯从周末截至24日连续上涨达百元，河北地区镀锌方管出厂报价上调60-100元不 等，… 无锡镀锌方管市场价格将持稳运行厂家基本停…方管无锡镀锌方管市场价格暂稳。今日期货震荡，上游原料及管厂出厂价格均稳。目前无锡地区镀锌方管价格稳。年关已至，无锡市场方管厂家基本停止出货，纷纷放假，库存维持稳定。预计近期无锡镀锌方管市场价格将持稳运行。原料方面，今日下午唐山普碳150方坯价格持稳，报价3300元；唐山瑞丰355mm系列带钢价格暂稳，报价3570元。河北…