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一、引言为了满足各种规格的钢管需求,出现了包括无缝和有缝钢管生产在内的多种方法。历来有人怀疑,焊接钢管在性能上是否能与无缝钢管相比。近二十年来,焊接管生产技术在国外发展较快。60年代中期开始,不锈钢焊接管已在石油、化工、天然气工业、化纤、造纸工业、食品加工以及其他轻工业部门得到了广泛应用。不锈钢焊管与无缝管相比,具有生产方式简单、容易交换产品规格、生产成本低、管壁相对于外径较薄等优点,有些工业发达国家
I. INTRODUCTION In order to meet the demand of steel pipes of various specifications, a variety of methods have emerged, including the production of seamless and seamed steel pipes. Traditionally, some people doubt that the performance of welded steel pipe with seamless steel pipe compared. In the past two decades, welded pipe production technology developed rapidly in foreign countries. Since the mid-1960s, stainless steel welded pipe has been widely used in petroleum, chemical, natural gas, chemical fiber, paper making, food processing and other light industrial sectors. Compared with the seamless pipe, stainless steel welded pipe has the advantages of simple production method, easy exchange of product specifications, low production cost, thin wall relative to the outer diameter, etc. In some industrialized countries