concrete pump pipe high wear-resisting, inner-harden, long service life, ... or welded tube)material:45Mn2,high quality alloy steel pipe,st52,20#steel,etcsize:DN 125mm or DN 150mmWall ... 2000/1000148mm chrom carbide insertSchwing,Putzmeister,CIFA,Kyokuto,SanyZX-pipe(ST52)Harden ZX-pipe1257.03000/2000/1000ZX-5’’ F ... /M FlangesPutzmeisterHigh Pressure125Schwing F/M pipe(ST52)1254.0,4.5,7.0,8.03000 ...