DN125 ST52 Concrete Pump Pipe,Boom Pipe,concrete pump spare parts of pump pipe DN125 x 3000mm with thickness of 4.5mm,4.5mm,5.0mm,7.0mm made by ST52 seamless steel pipes Name: pump pipe Size: DN100,DN125,DN150DN180 Length: according to your requirements Quality: St52, hardened or twin-wall pipe Thickness: 4.0mm, 4.5mm, 5.0mm, 7.0mm Weld-on ends: 148mm, Putzmeister F/M or Schwing F/M collars