美国是世界上最大的钢管市场，1997年又是自1993年以来市场最好的一年。国内生产和进口总量达到1460万t，比1996年增加了14．7％，约187万t，国内生产和进口总量见表1。表11997年美国国内无缝管生产和进口总量统计1997年美国进口总量213万t，比1996年增加19％；出口总量92万t， The United States is the largest steel pipe market in the world, and 1997 is the best year for the market since 1993. The total domestic production and imports reached 14.6 million tons, an increase of 14.7% over 1996, or about 1.87 million tons. Table 1 shows the total domestic production and imports. Table 11997 Statistics on the Production and Import Volume of Seamless Pipe in the United States in 1997 The total U.S. imports were 2.13 million tons in 1997, an increase of 19% over 1996; the total volume of exports was 920,000 tons,