中国微合金化技术与含铌钢发展30周-of Evolution(18)

中国微合金化技术与含铌钢发展30周-of Evolution

38 中国含铌钢技术发展30周年国际研讨会论文集

became less nationalistic. In the period since 2000 North American pipeline construction has been based to a major extent (>50%) on imported pipe from producers in India and elsewhere. This has recently stimulated the construction of 8 or 9 green field spiral seam pipe manufacturing plants in the USA which will once again affect the dynamics of the market place.

Table 13: Chinese (CNPC and Sinopec) Pipe Mills