sanonpipe bụ ọkachamara na-ebubata na onye na-emepụta ọrụ ọkpọkọ enweghị nkebi na China. Isi ngwaahịa ya bụọkpọkọ ọkpọkọ, ọkpọkọ mmanụ, ígwè ọkpọkọ, fatịlaịza na ọkpọkọ kemịkalụ, nastructural enweghị nkebi ígwè ọkpọkọ. Ihe ndị bụ isi bụ:SA106B, 20 g, Q345, 12 Cr1MoVG, 15 CrMoG, Cr5Mo, 1 Cr9Mo, 10 CrMo910,A335P5/ P9 / P11 / P12 / P22 / P91 / P92