一、引言自前,我国钢管生产供需矛盾尖锐,随着我国国民经济进一步发展,这一矛盾将更加突出。世界上工业发达国家的钢管产量一般占钢产量的10％左右,而我国只占5～6％,其中无缝钢管和焊接钢管各占一半。为了满足日益增长的国民经济对钢管产品的数 I. INTRODUCTION In the past, the contradiction between the supply and demand of steel pipe production in our country was sharp. With the further development of our national economy, this contradiction will become even more prominent. The steel pipe production in the industrialized countries in the world generally accounts for about 10% of the steel output, while China only accounts for 5 ~ 6%, of which the seamless steel pipe and the welded steel pipe account for half each. In order to meet the growing national economy on the number of steel pipe products