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 …

南京市场方管价格上涨，成交尚可。早盘螺纹钢期货震荡调整。唐山方坯暂稳，现普碳方坯含税出厂3560元。从当地贸易商了解，商家 对后市持谨慎乐观，市场价格小幅回升，并且基本也得到了下游的认同，成交有所起色。由于目前价格仍有倒挂现象，商家涨价意愿还是较强。不过市场情绪才刚有 所修复，如无重大利好刺激，上涨空间也相对有限。目前市场小规格的螺纹钢暂时比较紧张，后期会有所缓解。综上所述，预计明日南京市场方管价格或窄幅调整。

Nanjing market manages the price to rise, the transaction is still acceptable. Early trading threaded steel futures shock adjustment. Tangshan billet is stable for the time being, and now the ordinary carbon billet with tax is 3560 yuan out of the factory. From the understanding of local traders, businessmen are cautiously optimistic about the future market, market prices have rebounded slightly, and have basically been recognized downstream, trading has improved. As the price is still inverted, the willingness of merchants to increase prices is still strong. However, market sentiment has just been repaired. Without significant positive stimulus, there is relatively limited room for growth. At present, the market of small specifications of threaded steel is relatively tense for the time being, and it will be eased later. To sum up, it is expected that the Nanjing market will adjust its price by a narrow margin tomorrow.

价格方面：截止发稿时，永钢、沙钢三级大螺纹4230元(吨价，下同)，涨10元。

Price: By the time of submission, Yonggang and Shagang three-level large thread 4230 yuan (ton price, the same below), up 10 yuan.

武汉镀锌方管价格趋强整理厂家库存压力不大…方管武汉镀锌方管价格趋强整理，市场方面，今晨开市，黑色系期货持红上扬，叠加成本端走势坚挺，提振市场操作情绪，主流价格同步跟涨居多，成交方面，价格上涨后， 下游及终端客户按需采买，市场整体交投氛围一般，考虑新资源到货正常，方管厂家库存压力不大，综上所述，故预计短期内本地镀锌方管主流价格或观望整理。方管价格方… 天津方管或将弱势走低厂家冬储心态极为薄弱…方管本周天津方管市场价格弱势运行，下周或将继续弱势调整。周内，在原料价格保持坚挺的带动下啊，本地方管市场价格也暂 时稳定，个别方管厂家报价试探性小幅下挫，但在需求低迷的背景下对市场的刺激作用有限，并未获得主流方管厂家的普遍响应和集体跟进。由于天气逐渐转冷不利于出货， 本地方管市场惨淡的终端需求雪上加霜，方管…