... , long service life, high security, highly pressurized,widely used concrete pump pipepipe line(wear-resistant seamless or welded tube)material:45Mn2 ... as to your requeirementTypeDNThickness(mm)Length(mm)Weld-on EndsApplicable pump BrandsST52/ST37/20#/Q235 steel pipe1254.0,4.5,7 ...