... Size: DN 125mm or DN 150mm 2. Wall thickness: 4.1-7.1mm 3 Material: 45Mn2, high quality alloy steel pipe, st52 ... 1. We are a professional manufacturer of concrete pump parts in China, specialized in producing concrete pump delivery pipe, rubber hose, elbow, bend, reducer, ... boom, and so on2. We have been supplying concrete pump parts for SCHWING, PUTZMEISTER, SANY, CIFA, KYOKUTO, ZOOMLION for 10 ...