We offer Concrete Pump Pipeline.ST52 Ordinary Pipe, Welded Tube, Wear Resistant Pipe, Double Tube.(straight welded pipe or seamless;Quality:Q235 No.20, st-52, 37Mn5, 45Mn2.Wall thickness:from 2mm to 10mm or moreLengths:According to the customers requirements.Normally 1m, 2m, 3m, 6m.Weld-on collars:suitable for all kind of connecting systems.FeatureInner wall is wear-resistant alloy;outer wall is high toughness steel.The whole inner wall is induction hardened.Both ends have chrome carbide insert.Service life is up to five times comparing with common steel pipe.A variety of specifications.we can product other specifications to the needs of customer.