... ISO2531-1998/GB13295-2003 3.Trusted supplier with abundant supply Welded Ductile Iron Pipe Supplier Specification:DN80-1200Weight of T type ... a good relationship of cooperation with major domestic steel mills in China , such as Baogang , Wugang , Shougang, Taigang, Angang. ... covers Asia, Middle East, South Africa and Korea, such as Malaysia, the United States , Singapore, Thailand, UAE, Brazil and so ...