中国微合金化技术与含铌钢发展30周-of Evolution(12)

中国微合金化技术与含铌钢发展30周-of Evolution

32 中国含铌钢技术发展30周年国际研讨会论文集

Industry specification have been updated in many countries to accommodate the HTP concept

[1819] and over 5 million tons of this very low carbon steel have been installed since 1972

[48]. However, there are still opportunities for changing restrictive microalloying element limits in specifications in Iran, India, CIS and elsewhere.

Figure 13: Progress in adopting X-80 Steel [33].

The rate of adoption of API Grade X-80 since 1985 is presented in Figure 13 above. A list of the projects comprising Figure 13 is presented in Table 7 [47]. The growth is becoming exponential as API Grade X-80 is being utilized in China for major portions of the 9250 km Second West-East Pipeline Project [33].