... shipbuilding casting pipe 1,Large-scaled cast steel items and cast iron items (unit weight < 60 tons); With the advanced equipment ... castings and precision castings;2,A variety of steel for steel ingots3,Large-scaled cast steel items and ... 60 tons);4,Undertaking various treatments for steel (anneal, normalizing, temper, hardening, solution heat treatment, quenching and so on. casting pipe for ship