Pipe powder is a ferrosilicon-based composite materials.The alloying elements and granularity are subject to rigorous design and control, can effectively reduce the undercooling, inhibit the formation of carbides, slow decay time,
has less sensitivity to the size of casting and in good agreement with the inoculation effect.Pipe powder can play the role of  instantaneus strengthening breeds, while eliminating the pores and pinholes on the outer surface of the cast  tube. In the latter part of it's application ,when the inner surface of corner crack serious, by the addition of some zinc powder, alumina powder, can help solve the problem of extubation difficult.Pipe powder can play the role of three times of inoculation..Our company is very popular for her good performance of product and favorable service.