Other Engineering & Construction MachineryChina Perforated Grouting Piling Steel Tube Injection Grouting Pipe by Q235B, Q345b, Gr. B with Sharp Pointed End for Grouting Work, Find details about China Grouting Pipe, Steel Pipe from Perforated Grouting Piling Steel Tube Injection Grouting Pipe by Q235B, Q345b, Gr. B with Sharp Pointed End for Grouting Work