Blasting device for steel pipe inner surface, blasting method for steel pipe inner surface, and method for producing steel pipe with excellent inner surface texture

摘要

A blasting device for blasting steel pipe inner surface includes a tubular carrier fluid inflow unit connected to one end of a horizontal steel pipe, and a negative pressure suction unit connected to the other end of the steel pipe. A polishing material or a wiping material is injected horizontally into the carrier fluid inflow unit along with a carrier fluid from a hole formed in the edge face of the tubular carrier inflow unit. The device provides improved blast performance as well as the capability to blast the inner surface from beginning portion to an end portion to provide an excellent inner surface texture.