concrete pump double wall reducer pipe,reducing pipe Concrete pump reducing pipe is a spare part for pipelines. 1.Material: ST52, 45Mn2, Q235,20#,37Mn5 etc. 2. Sizes: DN60-DN180 (mm unit) 3. Length: 1m,2m,3m, 6m or according to clients’ requirements. Our normal reducer for SCHWING  : DESCRIPTION  DN1 DN2 LENGTH (MM)  Reducer  150 125 1240 Twin wall reducer  150