国内方管价格或仍有偏弱可能厂家涨价意愿并…方管方管市场价格弱势为主。今日开盘，期螺期卷低开高走，反观现货市场方管厂家涨价意愿并不强，多数市场仍以弱势为主。目前来看，国内主导城市邯郸，天津，唐山，江阴，乐从方管 价格在3420,3600,3480,3610,3800元左右；其中华北邯郸唐山以及华南乐从价格下调20-50元；华东市场相对稳定，但仍有方管厂家窄幅 调整…

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.

南京方管节后市场价格盘整厂家操作意愿不强…方管南京方管节后市场价格盘整。市场方面，节后，上游企稳，市场价格变动较少。这几日南京市场价格随行调整，假期期间少有变动。市场贸易反馈的情况来看，当地镀锌管管厂暂未调价，市场镀锌方管库存下降缓慢，操作意愿不强，预期震荡调整为主。节后方管价格继续受多方影响，方管价格仍将维持窄幅震荡局面。 原料方面，今日上游钢… 上海方管价格持稳运行厂家多已出货为主方管上海方管价格持稳运行，市场方面，今本地市价主流稳中偏弱运行，目前方管市场需求整体一般，成交相对偏弱。由于当前南北热轧方管库存均偏低，五月以来下游需求有萎缩迹象，方管厂家多已出货为主。不过库存资源相对不多，商家出货压力不大，市场价格比较稳健。目前市场供需处于平衡，方管厂家多持观望态度。考虑到目前市场压力…