方管和矩形管冷弯成型时不同的特点方管冷弯方管、冷弯矩形管是通过外辊与管坯外壁的单向接触形成弯矩使带料弯折,冷弯会使弯折线产生压缩,压缩效应使弯折线纵向伸长,弯折处金属出现堆积变厚,这就是冷弯的压缩/增厚效应。Cold-formed square pipe and cold-formed rectangular pipe bend the strip through the unidirectional contact between the …

方管价格窄幅上调，15日国内方管涨跌互现。今日145方管早盘开市主流报稳3880含税出厂，多数成交尚可，部分方管厂家早早出清日产停售，下游架子管需求较好，小窄 带价格有支撑，今日唐山丰润区调坯型钢厂预计按文件执行停限产，钢坯投机需求增加，钢坯直发较好，因此小窄带盘中累涨20；唐山355方管主流较昨涨 10，中宽带较昨涨20，周末两日没有期货做指导，因此方管价格仅依靠市场成交做参考，连续两日多以稳为主，今日铁矿石大幅拉涨，带动期螺尾盘大幅拉升， 调坯型钢厂、窄带及建筑钢材绝大多数将按照政策在7月16日凌晨执行停产，产线开工率将有所下降，对市场情绪有所提振，因此钢坯价格累涨20，方管成本上升， 因此方管出厂价也跟涨10-20，但整体出货一般，商家多挺价为主；华东华南地区今日方管价格窄幅调整，市场整体成交情况不温不火，下游需求表现平平，淡 季效应下拿货情绪普遍不高。目前，北方市场交投氛围受期货及限产影响好转，市场价格回涨10-20左右，当地贸易商部分有跟随拉涨情况，但具体成交暂无明 显好转。综合来看，考虑到供需弱势平衡，预计短期内国内方管市场或将高位坚挺整理为主。

Square tube prices rose narrowly, and domestic tube prices rose and fell on the 15th. Today, 145 square pipe early market mainstream reported stable 3880 with tax, most of the transactions are still acceptable, some square pipe manufacturers early out of the early morning Nissan stop selling, downstream shelf pipe demand is better, small narrow band prices are supportive, today Tangshan Fengrun District billet mill is expected to stop production according to the document, billet speculative demand increased, billet direct delivery is better, As a result, the mainstream of Tangshan 355 square pipe increased by 20% compared with yesterday, the broadband increased by 20% compared with yesterday, and the broadband increased by 20% compared with yesterday. There was no futures guidance on weekend two days. Therefore, the square pipe price only relied on market transactions as a reference. For two consecutive days, it was mainly stable. Today, iron ore rose sharply, leading to a sharp increase in the tail plate during the period, billet-adjusting mills, narrowbands and so on. The majority of construction steel will be shut down in the early morning of July 16 in accordance with the policy. The production line start-up rate will decrease and the market sentiment will be boosted. As a result, the billet price will increase by 20 and the square tube cost will rise. Therefore, the square tube ex-factory price will also rise by 10-20, but the overall shipment is general, and the merchants are mainly in the south of East China today. In spite of the narrow price adjustment, the overall market turnover is tepid, the downstream demand performance is flat, and the mood of picking up goods under the off-season effect is generally not high. At present, the trading climate in the northern market has been improved by futures and production restrictions. Market prices have risen by about 10-20. Some local traders have followed the upward trend, but the specific transaction has not improved significantly for the time being. Generally speaking, considering the weak balance between supply and demand, it is expected that the domestic market will be dominated by a strong consolidation in the short term.

方管价格方面：唐山热轧方管(2.5*355mm)唐山瑞丰3890较昨日涨20；天津热轧方管 4.0*(480-570)天津荣钢3940较昨涨20；无锡热轧方管（2.5*355mm）中天3950较昨降10，莱芜热轧方管2.5* （232-355）莱钢3910较昨稳，唐山热轧小窄带报3900较昨涨20。

明日国内方管价格或仍以维稳为主厂家不缺货…方管方管市场价格继续持平。临近年末，方管现货价格调整幅度不大，方管出货稳中偏弱。据悉，市场平均出货在200-400吨，超级大户出货能达到千吨。目前方管市场规格型号已经基本齐 全，方管厂家不缺货。方管厂家复产近期缓慢到货。而冬储上方管厂家表示并未做库存，一些方管厂家维持今年协议，还有一些方管厂家取消了协议，改做锁价… 全国方管市场价格走势以涨为主中间商拿货放…方管全国方管市场价格走势以涨为主，其中华东、华南、华北、东北地区涨势比较均衡，涨幅在30-80元/吨不等，而西南地区涨幅较大，幅度在 50-100元/吨。下面具体来看：周初开市，全国方管市场涨跌稳并存，幅度在10-60元/吨，关联期卷持红上扬，提振市场心态，商家坚挺出货操作，但 首日运行13%新税率的商家则高位回落，然下游补货心…