Ductile iron pipe

Ductile iron pipe Hualong was granted the certification of ISO9001 in Aug2001. We are cooperation with Germany and Spain many years. So you may rest assured that the quality of the casting products.a )Ductile iron pipe molding process is sand casting;b)Ductile iron pipe is cast by mould boardsc)Ductile iron pipe is epoxy coating . Coating as per customer's requirement