1973年石油危机以来的一个时期内,世界各国的钢管生产曾经有了相当大的发展,增长速度很高,其中无缝钢管的增长尤快。世界钢管产量在粗钢产量中所占比例已增加到9％以上。西德、苏联、日本等国家达到10—12％。％13(1978—1979),而意大利更高,达到了近年来,由于各国加紧寻找和开采石油和天然气,石油管的需要量大增,从而在世界范围内又出现了建设纲管设备,别特是无缝钢管设备的热潮。有些国家尽管经济处于萧条或不甚 During the period since the oil crisis in 1973, the steel pipe production in various countries in the world had experienced considerable growth with a high growth rate, of which the growth of seamless steel pipe was particularly rapid. World steel production accounts for more than 9% of the crude steel output. West Germany, the Soviet Union, Japan and other countries reached 10-12%. % 13 (1978-1979), while Italy is even higher. In recent years, due to the intensified search and exploitation of oil and natural gas by various countries, the demand for petroleum pipelines has risen sharply. Especially the seamless pipe equipment boom. In some countries, the economy is in a recession or not