... High compressive strength * Productivity: 30-100pcs/8h Concrete pipe production line Brief intruduction a) HF vertical extruding pipe-making machine is ... the mold immediately to maintenance, etc. Available raw materials sand, gravel, stone chips, fly ash and slag mixed with ... , 40mm for dia 400mm, 50mm for dia 500mm, 60mm for dia 600mm , 70mm for dia 700 , 80mm for dia 800mm, 100mm for dia 1000mmSpeed ...