国内方管价格窄幅下调厂家处于利润边缘或倒…方管今日方管市场价格主稳个调，整体成交仍然受限，成本方面虽有波动，但现货调价不积极，多数方管厂家处于利润边缘或倒挂，本周开工率继续下滑，方管 厂停产检修居多。今日除南方日钢资源个别上调20-30元，其它市场价格继续持稳，在这种上涨无力，下跌有限的行情下，方管厂家操作空间小，出货普遍不佳，午后昌黎…

让现已加工成制品方管具有较小曲折度还得依靠机械东西校直机来完结。所以为了消除方管曲折，一切方管都需求经过冷校直。方管曲折是因为轧机调整不妥，轧制时残留的剩余应力以及因为沿管子截面和长度上冷却不平等缘由形成的。因而，不行能从轧机直接得到很直的管子，只要通过冷校直管子的曲折度才干满意技能条件的规则。

To make the square tubes of the products processed now have a small degree of flexibility, we have to rely on the mechanical straightening machine to complete the straightening machine from east to west. Therefore, in order to eliminate the twists and turns of square tubes, all square tubes need to undergo cold straightening. The bending of square pipe is caused by improper adjustment of rolling mill, residual stress during rolling and unequal cooling along the section and length of pipe. Therefore, it is impossible to get very straight pipes directly from the rolling mill. Only by cold straightening the pipe's flexibility can the rules of skill conditions be satisfied.

校直的根本道理即是使方管进行弹塑性曲折，由大的曲折度成为小的曲折度，因而钢管在校直机内有必要遭到重复曲折。而钢管重复曲折的程度主要由校直机的调整所决议。

The basic principle of straightening is to make square pipe elastic-plastic twist, from large twist to small twist, so it is necessary for steel pipe to be repeated twist in straightening machine. The degree of repeated twists and turns of steel pipe is mainly determined by the adjustment of straightening machine.

影响校直质量的要素许多，如原管的曲折度，钢管尺度和材料校直机型式，调整参数等。

There are many factors affecting the quality of straightening, such as the bending degree of the original pipe, the size of the steel pipe and the type of straightening machine for materials, and the adjustment of parameters.

武汉方管价格或将继续维稳目前市场整体库量…方管武汉方管价格持稳，成交偏弱。早盘商家暂稳观望，但午后出货受限，部分代理商有暗降10元/吨出货现象，今日整体成交较昨日略有萎缩，本周二受期货拉涨，出货尚可，其余需求均 欠佳。据商家反馈，个别代理商为提高市场份额，存在压价现象，其中低价资源也影响了市场方管厂家正常出货。资源方面，本周西城、恒润到货集中，汉冶正… 乌鲁木齐方管市场或将以震荡盘整为主成交依…方管本周乌鲁木齐方管厂家市场各商户平稳报价，市场成交依旧冷清。据了解，今日八钢出台下月板材期货价格，依旧以平盘为主，本地方管厂家市场价格弱势调 整。成交方面，临近年底，乌鲁木齐方管厂家市场需求日渐减少，多数方管厂家日成交量在50吨以内。资源方面，本周由于主导钢厂到货量偏低，但市场需求基本停滞，市场整体库存较…