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长期以来,在许多欧洲国家中周期轧管机一直作为生产无缝钢管的主要设备。但是随着连铸坯的普遍使用,周期轧管机采用钢锭直接轧管,成本较低的优点已逐渐丧失,许多老机组已停产、被淘汰或改造,世界上的周期轧管机数量呈逐年下降的趋势;但近年来仍有一些国家根据自己的国情新建或改造周期轧管机。周期轧管机今后将主要在大直径管、厚壁管、异形管和高合金管生产中保持自己的优势(如检修时间短、基建投资
For a long time, the periodic mill in many European countries has been the main equipment for the production of seamless steel pipe. However, with the widespread use of continuous casting billets, the periodic tube rolling mill adopts the direct rolling of steel ingots and the advantages of lower cost have gradually been lost. Many old units have been discontinued and have been eliminated or reformed. The number of periodic rolling mills in the world has been increasing year by year Declining trend; but in recent years, some countries still have new or modified cycle rolling mills according to their own national conditions. In the future, the periodic tube rolling mill will mainly maintain its advantages in the production of large diameter pipes, thick-walled pipes, special-shaped pipes and high alloy pipes (such as overhauling time, infrastructure investment