... and easy to maintained etc2,Mould and concrete pipe Inner diameter:300-3000mmLength:1000-5000mmWall thickness: ... To produce a (reinforced)concrete pipe making machine,you also need Automatic steel cage welding machine,Concrete feeder,Concrete mixer,Batching ... pipe making machine,please tell me the following informations,thanks for your cooperation:...1,the pipe length2,the pipe inner diameter3,the pipe ...