... Prospect " brand , twin wall concrete pump pipe system , Easy reach to 50000 to 80000 ... PM,KYOKUTO,SANY,ZOOMLION, CIFA, SINOTRUK, FOTON,etc and have been recoginezed by them. Concrete Pump PipeTechnology : ... It is quenched and carried out carburizing chemical treatment on the inner wall ... inner wall can reach 60-65 degrees and the serving life of it can increase 3- ...